diff --git a/.idea/.gitignore b/.idea/.gitignore
index 13566b8..a9d7db9 100644
--- a/.idea/.gitignore
+++ b/.idea/.gitignore
@@ -6,3 +6,5 @@
 # Datasource local storage ignored files
 /dataSources/
 /dataSources.local.xml
+# GitHub Copilot persisted chat sessions
+/copilot/chatSessions
diff --git a/.idea/misc.xml b/.idea/misc.xml
index e1c7304..4223d4a 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,5 +1,21 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="ANTLRGenerationPreferences">
+    <option name="perGrammarGenerationSettings">
+      <list>
+        <PerGrammarGenerationSettings>
+          <option name="fileName" value="$PROJECT_DIR$/src/main/antlr4/de/dhbw/horb/Decaf.g4" />
+          <option name="autoGen" value="true" />
+          <option name="outputDir" value="src/main/java" />
+          <option name="libDir" value="" />
+          <option name="encoding" value="" />
+          <option name="pkg" value="de.dhbw.horb.ast" />
+          <option name="language" value="" />
+          <option name="generateVisitor" value="true" />
+        </PerGrammarGenerationSettings>
+      </list>
+    </option>
+  </component>
   <component name="ExternalStorageConfigurationManager" enabled="true" />
   <component name="MavenProjectsManager">
     <option name="originalFiles">
diff --git a/decaf.iml b/decaf.iml
index 64976d5..098e100 100644
--- a/decaf.iml
+++ b/decaf.iml
@@ -2,7 +2,7 @@
 <module version="4">
   <component name="AdditionalModuleElements">
     <content url="file://$MODULE_DIR$" dumb="true">
-      <sourceFolder url="file://$MODULE_DIR$/target/generated-sources" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/target/generated-sources" isTestSource="false" generated="true" />
     </content>
   </component>
 </module>
\ No newline at end of file
diff --git a/gen/Decaf.interp b/gen/Decaf.interp
new file mode 100644
index 0000000..fdd9c32
--- /dev/null
+++ b/gen/Decaf.interp
@@ -0,0 +1,78 @@
+token literal names:
+null
+';'
+'def'
+'('
+')'
+','
+'{'
+'}'
+'='
+'if'
+'else'
+'while'
+'return'
+'break'
+'continue'
+'true'
+'false'
+'-'
+'+'
+'*'
+'int'
+'bool'
+'void'
+null
+null
+null
+
+token symbolic names:
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+SUB
+ADD
+MUL
+INT
+BOOL
+VOID
+IDENTIFIER
+Number
+WS
+
+rule names:
+program
+var
+type
+func
+params
+param
+block
+stmt
+expr
+binaryOp
+loc
+funcCall
+args
+literal
+boolean
+number
+id
+
+
+atn:
+[4, 1, 25, 167, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15, 2, 16, 7, 16, 1, 0, 1, 0, 5, 0, 37, 8, 0, 10, 0, 12, 0, 40, 9, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 3, 3, 53, 8, 3, 1, 3, 1, 3, 1, 3, 1, 4, 1, 4, 1, 4, 5, 4, 61, 8, 4, 10, 4, 12, 4, 64, 9, 4, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6, 5, 6, 71, 8, 6, 10, 6, 12, 6, 74, 9, 6, 1, 6, 5, 6, 77, 8, 6, 10, 6, 12, 6, 80, 9, 6, 1, 6, 1, 6, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 3, 7, 99, 8, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 3, 7, 117, 8, 7, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 3, 8, 127, 8, 8, 1, 8, 1, 8, 1, 8, 1, 8, 5, 8, 133, 8, 8, 10, 8, 12, 8, 136, 9, 8, 1, 9, 1, 9, 1, 10, 1, 10, 1, 11, 1, 11, 1, 11, 3, 11, 145, 8, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 12, 5, 12, 152, 8, 12, 10, 12, 12, 12, 155, 9, 12, 1, 13, 1, 13, 3, 13, 159, 8, 13, 1, 14, 1, 14, 1, 15, 1, 15, 1, 16, 1, 16, 1, 16, 0, 1, 16, 17, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 0, 3, 1, 0, 20, 22, 1, 0, 17, 19, 1, 0, 15, 16, 170, 0, 38, 1, 0, 0, 0, 2, 41, 1, 0, 0, 0, 4, 45, 1, 0, 0, 0, 6, 47, 1, 0, 0, 0, 8, 57, 1, 0, 0, 0, 10, 65, 1, 0, 0, 0, 12, 68, 1, 0, 0, 0, 14, 116, 1, 0, 0, 0, 16, 126, 1, 0, 0, 0, 18, 137, 1, 0, 0, 0, 20, 139, 1, 0, 0, 0, 22, 141, 1, 0, 0, 0, 24, 148, 1, 0, 0, 0, 26, 158, 1, 0, 0, 0, 28, 160, 1, 0, 0, 0, 30, 162, 1, 0, 0, 0, 32, 164, 1, 0, 0, 0, 34, 37, 3, 2, 1, 0, 35, 37, 3, 6, 3, 0, 36, 34, 1, 0, 0, 0, 36, 35, 1, 0, 0, 0, 37, 40, 1, 0, 0, 0, 38, 36, 1, 0, 0, 0, 38, 39, 1, 0, 0, 0, 39, 1, 1, 0, 0, 0, 40, 38, 1, 0, 0, 0, 41, 42, 3, 4, 2, 0, 42, 43, 3, 32, 16, 0, 43, 44, 5, 1, 0, 0, 44, 3, 1, 0, 0, 0, 45, 46, 7, 0, 0, 0, 46, 5, 1, 0, 0, 0, 47, 48, 5, 2, 0, 0, 48, 49, 3, 4, 2, 0, 49, 50, 3, 32, 16, 0, 50, 52, 5, 3, 0, 0, 51, 53, 3, 8, 4, 0, 52, 51, 1, 0, 0, 0, 52, 53, 1, 0, 0, 0, 53, 54, 1, 0, 0, 0, 54, 55, 5, 4, 0, 0, 55, 56, 3, 12, 6, 0, 56, 7, 1, 0, 0, 0, 57, 62, 3, 10, 5, 0, 58, 59, 5, 5, 0, 0, 59, 61, 3, 10, 5, 0, 60, 58, 1, 0, 0, 0, 61, 64, 1, 0, 0, 0, 62, 60, 1, 0, 0, 0, 62, 63, 1, 0, 0, 0, 63, 9, 1, 0, 0, 0, 64, 62, 1, 0, 0, 0, 65, 66, 3, 4, 2, 0, 66, 67, 3, 32, 16, 0, 67, 11, 1, 0, 0, 0, 68, 72, 5, 6, 0, 0, 69, 71, 3, 2, 1, 0, 70, 69, 1, 0, 0, 0, 71, 74, 1, 0, 0, 0, 72, 70, 1, 0, 0, 0, 72, 73, 1, 0, 0, 0, 73, 78, 1, 0, 0, 0, 74, 72, 1, 0, 0, 0, 75, 77, 3, 14, 7, 0, 76, 75, 1, 0, 0, 0, 77, 80, 1, 0, 0, 0, 78, 76, 1, 0, 0, 0, 78, 79, 1, 0, 0, 0, 79, 81, 1, 0, 0, 0, 80, 78, 1, 0, 0, 0, 81, 82, 5, 7, 0, 0, 82, 13, 1, 0, 0, 0, 83, 84, 3, 20, 10, 0, 84, 85, 5, 8, 0, 0, 85, 86, 3, 16, 8, 0, 86, 87, 5, 1, 0, 0, 87, 117, 1, 0, 0, 0, 88, 89, 3, 22, 11, 0, 89, 90, 5, 1, 0, 0, 90, 117, 1, 0, 0, 0, 91, 92, 5, 9, 0, 0, 92, 93, 5, 3, 0, 0, 93, 94, 3, 16, 8, 0, 94, 95, 5, 4, 0, 0, 95, 98, 3, 12, 6, 0, 96, 97, 5, 10, 0, 0, 97, 99, 3, 12, 6, 0, 98, 96, 1, 0, 0, 0, 98, 99, 1, 0, 0, 0, 99, 117, 1, 0, 0, 0, 100, 101, 5, 11, 0, 0, 101, 102, 5, 3, 0, 0, 102, 103, 3, 16, 8, 0, 103, 104, 5, 4, 0, 0, 104, 105, 3, 12, 6, 0, 105, 117, 1, 0, 0, 0, 106, 107, 5, 12, 0, 0, 107, 108, 3, 16, 8, 0, 108, 109, 5, 1, 0, 0, 109, 117, 1, 0, 0, 0, 110, 111, 5, 12, 0, 0, 111, 117, 5, 1, 0, 0, 112, 113, 5, 13, 0, 0, 113, 117, 5, 1, 0, 0, 114, 115, 5, 14, 0, 0, 115, 117, 5, 1, 0, 0, 116, 83, 1, 0, 0, 0, 116, 88, 1, 0, 0, 0, 116, 91, 1, 0, 0, 0, 116, 100, 1, 0, 0, 0, 116, 106, 1, 0, 0, 0, 116, 110, 1, 0, 0, 0, 116, 112, 1, 0, 0, 0, 116, 114, 1, 0, 0, 0, 117, 15, 1, 0, 0, 0, 118, 119, 6, 8, -1, 0, 119, 127, 3, 26, 13, 0, 120, 121, 5, 3, 0, 0, 121, 122, 3, 16, 8, 0, 122, 123, 5, 4, 0, 0, 123, 127, 1, 0, 0, 0, 124, 127, 3, 22, 11, 0, 125, 127, 3, 20, 10, 0, 126, 118, 1, 0, 0, 0, 126, 120, 1, 0, 0, 0, 126, 124, 1, 0, 0, 0, 126, 125, 1, 0, 0, 0, 127, 134, 1, 0, 0, 0, 128, 129, 10, 5, 0, 0, 129, 130, 3, 18, 9, 0, 130, 131, 3, 16, 8, 6, 131, 133, 1, 0, 0, 0, 132, 128, 1, 0, 0, 0, 133, 136, 1, 0, 0, 0, 134, 132, 1, 0, 0, 0, 134, 135, 1, 0, 0, 0, 135, 17, 1, 0, 0, 0, 136, 134, 1, 0, 0, 0, 137, 138, 7, 1, 0, 0, 138, 19, 1, 0, 0, 0, 139, 140, 3, 32, 16, 0, 140, 21, 1, 0, 0, 0, 141, 142, 3, 32, 16, 0, 142, 144, 5, 3, 0, 0, 143, 145, 3, 24, 12, 0, 144, 143, 1, 0, 0, 0, 144, 145, 1, 0, 0, 0, 145, 146, 1, 0, 0, 0, 146, 147, 5, 4, 0, 0, 147, 23, 1, 0, 0, 0, 148, 153, 3, 16, 8, 0, 149, 150, 5, 5, 0, 0, 150, 152, 3, 16, 8, 0, 151, 149, 1, 0, 0, 0, 152, 155, 1, 0, 0, 0, 153, 151, 1, 0, 0, 0, 153, 154, 1, 0, 0, 0, 154, 25, 1, 0, 0, 0, 155, 153, 1, 0, 0, 0, 156, 159, 3, 30, 15, 0, 157, 159, 3, 28, 14, 0, 158, 156, 1, 0, 0, 0, 158, 157, 1, 0, 0, 0, 159, 27, 1, 0, 0, 0, 160, 161, 7, 2, 0, 0, 161, 29, 1, 0, 0, 0, 162, 163, 5, 24, 0, 0, 163, 31, 1, 0, 0, 0, 164, 165, 5, 23, 0, 0, 165, 33, 1, 0, 0, 0, 13, 36, 38, 52, 62, 72, 78, 98, 116, 126, 134, 144, 153, 158]
\ No newline at end of file
diff --git a/gen/Decaf.tokens b/gen/Decaf.tokens
new file mode 100644
index 0000000..bb87b00
--- /dev/null
+++ b/gen/Decaf.tokens
@@ -0,0 +1,47 @@
+T__0=1
+T__1=2
+T__2=3
+T__3=4
+T__4=5
+T__5=6
+T__6=7
+T__7=8
+T__8=9
+T__9=10
+T__10=11
+T__11=12
+T__12=13
+T__13=14
+T__14=15
+T__15=16
+SUB=17
+ADD=18
+MUL=19
+INT=20
+BOOL=21
+VOID=22
+IDENTIFIER=23
+Number=24
+WS=25
+';'=1
+'def'=2
+'('=3
+')'=4
+','=5
+'{'=6
+'}'=7
+'='=8
+'if'=9
+'else'=10
+'while'=11
+'return'=12
+'break'=13
+'continue'=14
+'true'=15
+'false'=16
+'-'=17
+'+'=18
+'*'=19
+'int'=20
+'bool'=21
+'void'=22
diff --git a/gen/DecafBaseListener.java b/gen/DecafBaseListener.java
new file mode 100644
index 0000000..800f04a
--- /dev/null
+++ b/gen/DecafBaseListener.java
@@ -0,0 +1,375 @@
+// Generated from C:/Users/laure/Documents/Dev/Compilerbau/LearningANTLR/UeBung2/AntlrAssignment3/src/main/antlr4/de/dhbw/horb/Decaf.g4 by ANTLR 4.13.1
+
+import org.antlr.v4.runtime.ParserRuleContext;
+import org.antlr.v4.runtime.tree.ErrorNode;
+import org.antlr.v4.runtime.tree.TerminalNode;
+
+/**
+ * This class provides an empty implementation of {@link DecafListener},
+ * which can be extended to create a listener which only needs to handle a subset
+ * of the available methods.
+ */
+@SuppressWarnings("CheckReturnValue")
+public class DecafBaseListener implements DecafListener {
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterProgram(DecafParser.ProgramContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitProgram(DecafParser.ProgramContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterVar(DecafParser.VarContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitVar(DecafParser.VarContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterType(DecafParser.TypeContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitType(DecafParser.TypeContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterFunc(DecafParser.FuncContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitFunc(DecafParser.FuncContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterParams(DecafParser.ParamsContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitParams(DecafParser.ParamsContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterParam(DecafParser.ParamContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitParam(DecafParser.ParamContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterBlock(DecafParser.BlockContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitBlock(DecafParser.BlockContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterAssign(DecafParser.AssignContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitAssign(DecafParser.AssignContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterFunctionCall(DecafParser.FunctionCallContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitFunctionCall(DecafParser.FunctionCallContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterIf(DecafParser.IfContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitIf(DecafParser.IfContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterWhile(DecafParser.WhileContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitWhile(DecafParser.WhileContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterReturn(DecafParser.ReturnContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitReturn(DecafParser.ReturnContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterReturnVoid(DecafParser.ReturnVoidContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitReturnVoid(DecafParser.ReturnVoidContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterBreak(DecafParser.BreakContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitBreak(DecafParser.BreakContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterContinue(DecafParser.ContinueContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitContinue(DecafParser.ContinueContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterExpression(DecafParser.ExpressionContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitExpression(DecafParser.ExpressionContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterFunCallExpression(DecafParser.FunCallExpressionContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitFunCallExpression(DecafParser.FunCallExpressionContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterConstant(DecafParser.ConstantContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitConstant(DecafParser.ConstantContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterBinaryOperation(DecafParser.BinaryOperationContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitBinaryOperation(DecafParser.BinaryOperationContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterLocation(DecafParser.LocationContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitLocation(DecafParser.LocationContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterBinaryOp(DecafParser.BinaryOpContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitBinaryOp(DecafParser.BinaryOpContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterLoc(DecafParser.LocContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitLoc(DecafParser.LocContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterFuncCall(DecafParser.FuncCallContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitFuncCall(DecafParser.FuncCallContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterArgs(DecafParser.ArgsContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitArgs(DecafParser.ArgsContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterLiteral(DecafParser.LiteralContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitLiteral(DecafParser.LiteralContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterBoolean(DecafParser.BooleanContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitBoolean(DecafParser.BooleanContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterNumber(DecafParser.NumberContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitNumber(DecafParser.NumberContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterId(DecafParser.IdContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitId(DecafParser.IdContext ctx) { }
+
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterEveryRule(ParserRuleContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitEveryRule(ParserRuleContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void visitTerminal(TerminalNode node) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void visitErrorNode(ErrorNode node) { }
+}
\ No newline at end of file
diff --git a/gen/DecafBaseVisitor.java b/gen/DecafBaseVisitor.java
new file mode 100644
index 0000000..4eb7ff6
--- /dev/null
+++ b/gen/DecafBaseVisitor.java
@@ -0,0 +1,210 @@
+// Generated from C:/Users/laure/Documents/Dev/Compilerbau/LearningANTLR/UeBung2/AntlrAssignment3/src/main/antlr4/de/dhbw/horb/Decaf.g4 by ANTLR 4.13.1
+import org.antlr.v4.runtime.tree.AbstractParseTreeVisitor;
+
+/**
+ * This class provides an empty implementation of {@link DecafVisitor},
+ * which can be extended to create a visitor which only needs to handle a subset
+ * of the available methods.
+ *
+ * @param <T> The return type of the visit operation. Use {@link Void} for
+ * operations with no return type.
+ */
+@SuppressWarnings("CheckReturnValue")
+public class DecafBaseVisitor<T> extends AbstractParseTreeVisitor<T> implements DecafVisitor<T> {
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitProgram(DecafParser.ProgramContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitVar(DecafParser.VarContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitType(DecafParser.TypeContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitFunc(DecafParser.FuncContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitParams(DecafParser.ParamsContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitParam(DecafParser.ParamContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitBlock(DecafParser.BlockContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitAssign(DecafParser.AssignContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitFunctionCall(DecafParser.FunctionCallContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitIf(DecafParser.IfContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitWhile(DecafParser.WhileContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitReturn(DecafParser.ReturnContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitReturnVoid(DecafParser.ReturnVoidContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitBreak(DecafParser.BreakContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitContinue(DecafParser.ContinueContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitExpression(DecafParser.ExpressionContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitFunCallExpression(DecafParser.FunCallExpressionContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitConstant(DecafParser.ConstantContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitBinaryOperation(DecafParser.BinaryOperationContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitLocation(DecafParser.LocationContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitBinaryOp(DecafParser.BinaryOpContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitLoc(DecafParser.LocContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitFuncCall(DecafParser.FuncCallContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitArgs(DecafParser.ArgsContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitLiteral(DecafParser.LiteralContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitBoolean(DecafParser.BooleanContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitNumber(DecafParser.NumberContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitId(DecafParser.IdContext ctx) { return visitChildren(ctx); }
+}
\ No newline at end of file
diff --git a/gen/DecafLexer.interp b/gen/DecafLexer.interp
new file mode 100644
index 0000000..22f63d0
--- /dev/null
+++ b/gen/DecafLexer.interp
@@ -0,0 +1,92 @@
+token literal names:
+null
+';'
+'def'
+'('
+')'
+','
+'{'
+'}'
+'='
+'if'
+'else'
+'while'
+'return'
+'break'
+'continue'
+'true'
+'false'
+'-'
+'+'
+'*'
+'int'
+'bool'
+'void'
+null
+null
+null
+
+token symbolic names:
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+SUB
+ADD
+MUL
+INT
+BOOL
+VOID
+IDENTIFIER
+Number
+WS
+
+rule names:
+T__0
+T__1
+T__2
+T__3
+T__4
+T__5
+T__6
+T__7
+T__8
+T__9
+T__10
+T__11
+T__12
+T__13
+T__14
+T__15
+SUB
+ADD
+MUL
+INT
+BOOL
+VOID
+IDENTIFIER
+Number
+WS
+
+channel names:
+DEFAULT_TOKEN_CHANNEL
+HIDDEN
+
+mode names:
+DEFAULT_MODE
+
+atn:
+[4, 0, 25, 150, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 2, 20, 7, 20, 2, 21, 7, 21, 2, 22, 7, 22, 2, 23, 7, 23, 2, 24, 7, 24, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 3, 1, 3, 1, 4, 1, 4, 1, 5, 1, 5, 1, 6, 1, 6, 1, 7, 1, 7, 1, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16, 1, 17, 1, 17, 1, 18, 1, 18, 1, 19, 1, 19, 1, 19, 1, 19, 1, 20, 1, 20, 1, 20, 1, 20, 1, 20, 1, 21, 1, 21, 1, 21, 1, 21, 1, 21, 1, 22, 4, 22, 138, 8, 22, 11, 22, 12, 22, 139, 1, 23, 4, 23, 143, 8, 23, 11, 23, 12, 23, 144, 1, 24, 1, 24, 1, 24, 1, 24, 0, 0, 25, 1, 1, 3, 2, 5, 3, 7, 4, 9, 5, 11, 6, 13, 7, 15, 8, 17, 9, 19, 10, 21, 11, 23, 12, 25, 13, 27, 14, 29, 15, 31, 16, 33, 17, 35, 18, 37, 19, 39, 20, 41, 21, 43, 22, 45, 23, 47, 24, 49, 25, 1, 0, 3, 2, 0, 65, 90, 97, 122, 1, 0, 48, 57, 3, 0, 9, 10, 13, 13, 32, 32, 151, 0, 1, 1, 0, 0, 0, 0, 3, 1, 0, 0, 0, 0, 5, 1, 0, 0, 0, 0, 7, 1, 0, 0, 0, 0, 9, 1, 0, 0, 0, 0, 11, 1, 0, 0, 0, 0, 13, 1, 0, 0, 0, 0, 15, 1, 0, 0, 0, 0, 17, 1, 0, 0, 0, 0, 19, 1, 0, 0, 0, 0, 21, 1, 0, 0, 0, 0, 23, 1, 0, 0, 0, 0, 25, 1, 0, 0, 0, 0, 27, 1, 0, 0, 0, 0, 29, 1, 0, 0, 0, 0, 31, 1, 0, 0, 0, 0, 33, 1, 0, 0, 0, 0, 35, 1, 0, 0, 0, 0, 37, 1, 0, 0, 0, 0, 39, 1, 0, 0, 0, 0, 41, 1, 0, 0, 0, 0, 43, 1, 0, 0, 0, 0, 45, 1, 0, 0, 0, 0, 47, 1, 0, 0, 0, 0, 49, 1, 0, 0, 0, 1, 51, 1, 0, 0, 0, 3, 53, 1, 0, 0, 0, 5, 57, 1, 0, 0, 0, 7, 59, 1, 0, 0, 0, 9, 61, 1, 0, 0, 0, 11, 63, 1, 0, 0, 0, 13, 65, 1, 0, 0, 0, 15, 67, 1, 0, 0, 0, 17, 69, 1, 0, 0, 0, 19, 72, 1, 0, 0, 0, 21, 77, 1, 0, 0, 0, 23, 83, 1, 0, 0, 0, 25, 90, 1, 0, 0, 0, 27, 96, 1, 0, 0, 0, 29, 105, 1, 0, 0, 0, 31, 110, 1, 0, 0, 0, 33, 116, 1, 0, 0, 0, 35, 118, 1, 0, 0, 0, 37, 120, 1, 0, 0, 0, 39, 122, 1, 0, 0, 0, 41, 126, 1, 0, 0, 0, 43, 131, 1, 0, 0, 0, 45, 137, 1, 0, 0, 0, 47, 142, 1, 0, 0, 0, 49, 146, 1, 0, 0, 0, 51, 52, 5, 59, 0, 0, 52, 2, 1, 0, 0, 0, 53, 54, 5, 100, 0, 0, 54, 55, 5, 101, 0, 0, 55, 56, 5, 102, 0, 0, 56, 4, 1, 0, 0, 0, 57, 58, 5, 40, 0, 0, 58, 6, 1, 0, 0, 0, 59, 60, 5, 41, 0, 0, 60, 8, 1, 0, 0, 0, 61, 62, 5, 44, 0, 0, 62, 10, 1, 0, 0, 0, 63, 64, 5, 123, 0, 0, 64, 12, 1, 0, 0, 0, 65, 66, 5, 125, 0, 0, 66, 14, 1, 0, 0, 0, 67, 68, 5, 61, 0, 0, 68, 16, 1, 0, 0, 0, 69, 70, 5, 105, 0, 0, 70, 71, 5, 102, 0, 0, 71, 18, 1, 0, 0, 0, 72, 73, 5, 101, 0, 0, 73, 74, 5, 108, 0, 0, 74, 75, 5, 115, 0, 0, 75, 76, 5, 101, 0, 0, 76, 20, 1, 0, 0, 0, 77, 78, 5, 119, 0, 0, 78, 79, 5, 104, 0, 0, 79, 80, 5, 105, 0, 0, 80, 81, 5, 108, 0, 0, 81, 82, 5, 101, 0, 0, 82, 22, 1, 0, 0, 0, 83, 84, 5, 114, 0, 0, 84, 85, 5, 101, 0, 0, 85, 86, 5, 116, 0, 0, 86, 87, 5, 117, 0, 0, 87, 88, 5, 114, 0, 0, 88, 89, 5, 110, 0, 0, 89, 24, 1, 0, 0, 0, 90, 91, 5, 98, 0, 0, 91, 92, 5, 114, 0, 0, 92, 93, 5, 101, 0, 0, 93, 94, 5, 97, 0, 0, 94, 95, 5, 107, 0, 0, 95, 26, 1, 0, 0, 0, 96, 97, 5, 99, 0, 0, 97, 98, 5, 111, 0, 0, 98, 99, 5, 110, 0, 0, 99, 100, 5, 116, 0, 0, 100, 101, 5, 105, 0, 0, 101, 102, 5, 110, 0, 0, 102, 103, 5, 117, 0, 0, 103, 104, 5, 101, 0, 0, 104, 28, 1, 0, 0, 0, 105, 106, 5, 116, 0, 0, 106, 107, 5, 114, 0, 0, 107, 108, 5, 117, 0, 0, 108, 109, 5, 101, 0, 0, 109, 30, 1, 0, 0, 0, 110, 111, 5, 102, 0, 0, 111, 112, 5, 97, 0, 0, 112, 113, 5, 108, 0, 0, 113, 114, 5, 115, 0, 0, 114, 115, 5, 101, 0, 0, 115, 32, 1, 0, 0, 0, 116, 117, 5, 45, 0, 0, 117, 34, 1, 0, 0, 0, 118, 119, 5, 43, 0, 0, 119, 36, 1, 0, 0, 0, 120, 121, 5, 42, 0, 0, 121, 38, 1, 0, 0, 0, 122, 123, 5, 105, 0, 0, 123, 124, 5, 110, 0, 0, 124, 125, 5, 116, 0, 0, 125, 40, 1, 0, 0, 0, 126, 127, 5, 98, 0, 0, 127, 128, 5, 111, 0, 0, 128, 129, 5, 111, 0, 0, 129, 130, 5, 108, 0, 0, 130, 42, 1, 0, 0, 0, 131, 132, 5, 118, 0, 0, 132, 133, 5, 111, 0, 0, 133, 134, 5, 105, 0, 0, 134, 135, 5, 100, 0, 0, 135, 44, 1, 0, 0, 0, 136, 138, 7, 0, 0, 0, 137, 136, 1, 0, 0, 0, 138, 139, 1, 0, 0, 0, 139, 137, 1, 0, 0, 0, 139, 140, 1, 0, 0, 0, 140, 46, 1, 0, 0, 0, 141, 143, 7, 1, 0, 0, 142, 141, 1, 0, 0, 0, 143, 144, 1, 0, 0, 0, 144, 142, 1, 0, 0, 0, 144, 145, 1, 0, 0, 0, 145, 48, 1, 0, 0, 0, 146, 147, 7, 2, 0, 0, 147, 148, 1, 0, 0, 0, 148, 149, 6, 24, 0, 0, 149, 50, 1, 0, 0, 0, 3, 0, 139, 144, 1, 6, 0, 0]
\ No newline at end of file
diff --git a/gen/DecafLexer.java b/gen/DecafLexer.java
new file mode 100644
index 0000000..e8a6452
--- /dev/null
+++ b/gen/DecafLexer.java
@@ -0,0 +1,209 @@
+// Generated from C:/Users/laure/Documents/Dev/Compilerbau/LearningANTLR/UeBung2/AntlrAssignment3/src/main/antlr4/de/dhbw/horb/Decaf.g4 by ANTLR 4.13.1
+import org.antlr.v4.runtime.Lexer;
+import org.antlr.v4.runtime.CharStream;
+import org.antlr.v4.runtime.Token;
+import org.antlr.v4.runtime.TokenStream;
+import org.antlr.v4.runtime.*;
+import org.antlr.v4.runtime.atn.*;
+import org.antlr.v4.runtime.dfa.DFA;
+import org.antlr.v4.runtime.misc.*;
+
+@SuppressWarnings({"all", "warnings", "unchecked", "unused", "cast", "CheckReturnValue", "this-escape"})
+public class DecafLexer extends Lexer {
+	static { RuntimeMetaData.checkVersion("4.13.1", RuntimeMetaData.VERSION); }
+
+	protected static final DFA[] _decisionToDFA;
+	protected static final PredictionContextCache _sharedContextCache =
+		new PredictionContextCache();
+	public static final int
+		T__0=1, T__1=2, T__2=3, T__3=4, T__4=5, T__5=6, T__6=7, T__7=8, T__8=9, 
+		T__9=10, T__10=11, T__11=12, T__12=13, T__13=14, T__14=15, T__15=16, SUB=17, 
+		ADD=18, MUL=19, INT=20, BOOL=21, VOID=22, IDENTIFIER=23, Number=24, WS=25;
+	public static String[] channelNames = {
+		"DEFAULT_TOKEN_CHANNEL", "HIDDEN"
+	};
+
+	public static String[] modeNames = {
+		"DEFAULT_MODE"
+	};
+
+	private static String[] makeRuleNames() {
+		return new String[] {
+			"T__0", "T__1", "T__2", "T__3", "T__4", "T__5", "T__6", "T__7", "T__8", 
+			"T__9", "T__10", "T__11", "T__12", "T__13", "T__14", "T__15", "SUB", 
+			"ADD", "MUL", "INT", "BOOL", "VOID", "IDENTIFIER", "Number", "WS"
+		};
+	}
+	public static final String[] ruleNames = makeRuleNames();
+
+	private static String[] makeLiteralNames() {
+		return new String[] {
+			null, "';'", "'def'", "'('", "')'", "','", "'{'", "'}'", "'='", "'if'", 
+			"'else'", "'while'", "'return'", "'break'", "'continue'", "'true'", "'false'", 
+			"'-'", "'+'", "'*'", "'int'", "'bool'", "'void'"
+		};
+	}
+	private static final String[] _LITERAL_NAMES = makeLiteralNames();
+	private static String[] makeSymbolicNames() {
+		return new String[] {
+			null, null, null, null, null, null, null, null, null, null, null, null, 
+			null, null, null, null, null, "SUB", "ADD", "MUL", "INT", "BOOL", "VOID", 
+			"IDENTIFIER", "Number", "WS"
+		};
+	}
+	private static final String[] _SYMBOLIC_NAMES = makeSymbolicNames();
+	public static final Vocabulary VOCABULARY = new VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);
+
+	/**
+	 * @deprecated Use {@link #VOCABULARY} instead.
+	 */
+	@Deprecated
+	public static final String[] tokenNames;
+	static {
+		tokenNames = new String[_SYMBOLIC_NAMES.length];
+		for (int i = 0; i < tokenNames.length; i++) {
+			tokenNames[i] = VOCABULARY.getLiteralName(i);
+			if (tokenNames[i] == null) {
+				tokenNames[i] = VOCABULARY.getSymbolicName(i);
+			}
+
+			if (tokenNames[i] == null) {
+				tokenNames[i] = "<INVALID>";
+			}
+		}
+	}
+
+	@Override
+	@Deprecated
+	public String[] getTokenNames() {
+		return tokenNames;
+	}
+
+	@Override
+
+	public Vocabulary getVocabulary() {
+		return VOCABULARY;
+	}
+
+
+	public DecafLexer(CharStream input) {
+		super(input);
+		_interp = new LexerATNSimulator(this,_ATN,_decisionToDFA,_sharedContextCache);
+	}
+
+	@Override
+	public String getGrammarFileName() { return "Decaf.g4"; }
+
+	@Override
+	public String[] getRuleNames() { return ruleNames; }
+
+	@Override
+	public String getSerializedATN() { return _serializedATN; }
+
+	@Override
+	public String[] getChannelNames() { return channelNames; }
+
+	@Override
+	public String[] getModeNames() { return modeNames; }
+
+	@Override
+	public ATN getATN() { return _ATN; }
+
+	public static final String _serializedATN =
+		"\u0004\u0000\u0019\u0096\u0006\uffff\uffff\u0002\u0000\u0007\u0000\u0002"+
+		"\u0001\u0007\u0001\u0002\u0002\u0007\u0002\u0002\u0003\u0007\u0003\u0002"+
+		"\u0004\u0007\u0004\u0002\u0005\u0007\u0005\u0002\u0006\u0007\u0006\u0002"+
+		"\u0007\u0007\u0007\u0002\b\u0007\b\u0002\t\u0007\t\u0002\n\u0007\n\u0002"+
+		"\u000b\u0007\u000b\u0002\f\u0007\f\u0002\r\u0007\r\u0002\u000e\u0007\u000e"+
+		"\u0002\u000f\u0007\u000f\u0002\u0010\u0007\u0010\u0002\u0011\u0007\u0011"+
+		"\u0002\u0012\u0007\u0012\u0002\u0013\u0007\u0013\u0002\u0014\u0007\u0014"+
+		"\u0002\u0015\u0007\u0015\u0002\u0016\u0007\u0016\u0002\u0017\u0007\u0017"+
+		"\u0002\u0018\u0007\u0018\u0001\u0000\u0001\u0000\u0001\u0001\u0001\u0001"+
+		"\u0001\u0001\u0001\u0001\u0001\u0002\u0001\u0002\u0001\u0003\u0001\u0003"+
+		"\u0001\u0004\u0001\u0004\u0001\u0005\u0001\u0005\u0001\u0006\u0001\u0006"+
+		"\u0001\u0007\u0001\u0007\u0001\b\u0001\b\u0001\b\u0001\t\u0001\t\u0001"+
+		"\t\u0001\t\u0001\t\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001"+
+		"\u000b\u0001\u000b\u0001\u000b\u0001\u000b\u0001\u000b\u0001\u000b\u0001"+
+		"\u000b\u0001\f\u0001\f\u0001\f\u0001\f\u0001\f\u0001\f\u0001\r\u0001\r"+
+		"\u0001\r\u0001\r\u0001\r\u0001\r\u0001\r\u0001\r\u0001\r\u0001\u000e\u0001"+
+		"\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000f\u0001\u000f\u0001"+
+		"\u000f\u0001\u000f\u0001\u000f\u0001\u000f\u0001\u0010\u0001\u0010\u0001"+
+		"\u0011\u0001\u0011\u0001\u0012\u0001\u0012\u0001\u0013\u0001\u0013\u0001"+
+		"\u0013\u0001\u0013\u0001\u0014\u0001\u0014\u0001\u0014\u0001\u0014\u0001"+
+		"\u0014\u0001\u0015\u0001\u0015\u0001\u0015\u0001\u0015\u0001\u0015\u0001"+
+		"\u0016\u0004\u0016\u008a\b\u0016\u000b\u0016\f\u0016\u008b\u0001\u0017"+
+		"\u0004\u0017\u008f\b\u0017\u000b\u0017\f\u0017\u0090\u0001\u0018\u0001"+
+		"\u0018\u0001\u0018\u0001\u0018\u0000\u0000\u0019\u0001\u0001\u0003\u0002"+
+		"\u0005\u0003\u0007\u0004\t\u0005\u000b\u0006\r\u0007\u000f\b\u0011\t\u0013"+
+		"\n\u0015\u000b\u0017\f\u0019\r\u001b\u000e\u001d\u000f\u001f\u0010!\u0011"+
+		"#\u0012%\u0013\'\u0014)\u0015+\u0016-\u0017/\u00181\u0019\u0001\u0000"+
+		"\u0003\u0002\u0000AZaz\u0001\u000009\u0003\u0000\t\n\r\r  \u0097\u0000"+
+		"\u0001\u0001\u0000\u0000\u0000\u0000\u0003\u0001\u0000\u0000\u0000\u0000"+
+		"\u0005\u0001\u0000\u0000\u0000\u0000\u0007\u0001\u0000\u0000\u0000\u0000"+
+		"\t\u0001\u0000\u0000\u0000\u0000\u000b\u0001\u0000\u0000\u0000\u0000\r"+
+		"\u0001\u0000\u0000\u0000\u0000\u000f\u0001\u0000\u0000\u0000\u0000\u0011"+
+		"\u0001\u0000\u0000\u0000\u0000\u0013\u0001\u0000\u0000\u0000\u0000\u0015"+
+		"\u0001\u0000\u0000\u0000\u0000\u0017\u0001\u0000\u0000\u0000\u0000\u0019"+
+		"\u0001\u0000\u0000\u0000\u0000\u001b\u0001\u0000\u0000\u0000\u0000\u001d"+
+		"\u0001\u0000\u0000\u0000\u0000\u001f\u0001\u0000\u0000\u0000\u0000!\u0001"+
+		"\u0000\u0000\u0000\u0000#\u0001\u0000\u0000\u0000\u0000%\u0001\u0000\u0000"+
+		"\u0000\u0000\'\u0001\u0000\u0000\u0000\u0000)\u0001\u0000\u0000\u0000"+
+		"\u0000+\u0001\u0000\u0000\u0000\u0000-\u0001\u0000\u0000\u0000\u0000/"+
+		"\u0001\u0000\u0000\u0000\u00001\u0001\u0000\u0000\u0000\u00013\u0001\u0000"+
+		"\u0000\u0000\u00035\u0001\u0000\u0000\u0000\u00059\u0001\u0000\u0000\u0000"+
+		"\u0007;\u0001\u0000\u0000\u0000\t=\u0001\u0000\u0000\u0000\u000b?\u0001"+
+		"\u0000\u0000\u0000\rA\u0001\u0000\u0000\u0000\u000fC\u0001\u0000\u0000"+
+		"\u0000\u0011E\u0001\u0000\u0000\u0000\u0013H\u0001\u0000\u0000\u0000\u0015"+
+		"M\u0001\u0000\u0000\u0000\u0017S\u0001\u0000\u0000\u0000\u0019Z\u0001"+
+		"\u0000\u0000\u0000\u001b`\u0001\u0000\u0000\u0000\u001di\u0001\u0000\u0000"+
+		"\u0000\u001fn\u0001\u0000\u0000\u0000!t\u0001\u0000\u0000\u0000#v\u0001"+
+		"\u0000\u0000\u0000%x\u0001\u0000\u0000\u0000\'z\u0001\u0000\u0000\u0000"+
+		")~\u0001\u0000\u0000\u0000+\u0083\u0001\u0000\u0000\u0000-\u0089\u0001"+
+		"\u0000\u0000\u0000/\u008e\u0001\u0000\u0000\u00001\u0092\u0001\u0000\u0000"+
+		"\u000034\u0005;\u0000\u00004\u0002\u0001\u0000\u0000\u000056\u0005d\u0000"+
+		"\u000067\u0005e\u0000\u000078\u0005f\u0000\u00008\u0004\u0001\u0000\u0000"+
+		"\u00009:\u0005(\u0000\u0000:\u0006\u0001\u0000\u0000\u0000;<\u0005)\u0000"+
+		"\u0000<\b\u0001\u0000\u0000\u0000=>\u0005,\u0000\u0000>\n\u0001\u0000"+
+		"\u0000\u0000?@\u0005{\u0000\u0000@\f\u0001\u0000\u0000\u0000AB\u0005}"+
+		"\u0000\u0000B\u000e\u0001\u0000\u0000\u0000CD\u0005=\u0000\u0000D\u0010"+
+		"\u0001\u0000\u0000\u0000EF\u0005i\u0000\u0000FG\u0005f\u0000\u0000G\u0012"+
+		"\u0001\u0000\u0000\u0000HI\u0005e\u0000\u0000IJ\u0005l\u0000\u0000JK\u0005"+
+		"s\u0000\u0000KL\u0005e\u0000\u0000L\u0014\u0001\u0000\u0000\u0000MN\u0005"+
+		"w\u0000\u0000NO\u0005h\u0000\u0000OP\u0005i\u0000\u0000PQ\u0005l\u0000"+
+		"\u0000QR\u0005e\u0000\u0000R\u0016\u0001\u0000\u0000\u0000ST\u0005r\u0000"+
+		"\u0000TU\u0005e\u0000\u0000UV\u0005t\u0000\u0000VW\u0005u\u0000\u0000"+
+		"WX\u0005r\u0000\u0000XY\u0005n\u0000\u0000Y\u0018\u0001\u0000\u0000\u0000"+
+		"Z[\u0005b\u0000\u0000[\\\u0005r\u0000\u0000\\]\u0005e\u0000\u0000]^\u0005"+
+		"a\u0000\u0000^_\u0005k\u0000\u0000_\u001a\u0001\u0000\u0000\u0000`a\u0005"+
+		"c\u0000\u0000ab\u0005o\u0000\u0000bc\u0005n\u0000\u0000cd\u0005t\u0000"+
+		"\u0000de\u0005i\u0000\u0000ef\u0005n\u0000\u0000fg\u0005u\u0000\u0000"+
+		"gh\u0005e\u0000\u0000h\u001c\u0001\u0000\u0000\u0000ij\u0005t\u0000\u0000"+
+		"jk\u0005r\u0000\u0000kl\u0005u\u0000\u0000lm\u0005e\u0000\u0000m\u001e"+
+		"\u0001\u0000\u0000\u0000no\u0005f\u0000\u0000op\u0005a\u0000\u0000pq\u0005"+
+		"l\u0000\u0000qr\u0005s\u0000\u0000rs\u0005e\u0000\u0000s \u0001\u0000"+
+		"\u0000\u0000tu\u0005-\u0000\u0000u\"\u0001\u0000\u0000\u0000vw\u0005+"+
+		"\u0000\u0000w$\u0001\u0000\u0000\u0000xy\u0005*\u0000\u0000y&\u0001\u0000"+
+		"\u0000\u0000z{\u0005i\u0000\u0000{|\u0005n\u0000\u0000|}\u0005t\u0000"+
+		"\u0000}(\u0001\u0000\u0000\u0000~\u007f\u0005b\u0000\u0000\u007f\u0080"+
+		"\u0005o\u0000\u0000\u0080\u0081\u0005o\u0000\u0000\u0081\u0082\u0005l"+
+		"\u0000\u0000\u0082*\u0001\u0000\u0000\u0000\u0083\u0084\u0005v\u0000\u0000"+
+		"\u0084\u0085\u0005o\u0000\u0000\u0085\u0086\u0005i\u0000\u0000\u0086\u0087"+
+		"\u0005d\u0000\u0000\u0087,\u0001\u0000\u0000\u0000\u0088\u008a\u0007\u0000"+
+		"\u0000\u0000\u0089\u0088\u0001\u0000\u0000\u0000\u008a\u008b\u0001\u0000"+
+		"\u0000\u0000\u008b\u0089\u0001\u0000\u0000\u0000\u008b\u008c\u0001\u0000"+
+		"\u0000\u0000\u008c.\u0001\u0000\u0000\u0000\u008d\u008f\u0007\u0001\u0000"+
+		"\u0000\u008e\u008d\u0001\u0000\u0000\u0000\u008f\u0090\u0001\u0000\u0000"+
+		"\u0000\u0090\u008e\u0001\u0000\u0000\u0000\u0090\u0091\u0001\u0000\u0000"+
+		"\u0000\u00910\u0001\u0000\u0000\u0000\u0092\u0093\u0007\u0002\u0000\u0000"+
+		"\u0093\u0094\u0001\u0000\u0000\u0000\u0094\u0095\u0006\u0018\u0000\u0000"+
+		"\u00952\u0001\u0000\u0000\u0000\u0003\u0000\u008b\u0090\u0001\u0006\u0000"+
+		"\u0000";
+	public static final ATN _ATN =
+		new ATNDeserializer().deserialize(_serializedATN.toCharArray());
+	static {
+		_decisionToDFA = new DFA[_ATN.getNumberOfDecisions()];
+		for (int i = 0; i < _ATN.getNumberOfDecisions(); i++) {
+			_decisionToDFA[i] = new DFA(_ATN.getDecisionState(i), i);
+		}
+	}
+}
\ No newline at end of file
diff --git a/gen/DecafLexer.tokens b/gen/DecafLexer.tokens
new file mode 100644
index 0000000..bb87b00
--- /dev/null
+++ b/gen/DecafLexer.tokens
@@ -0,0 +1,47 @@
+T__0=1
+T__1=2
+T__2=3
+T__3=4
+T__4=5
+T__5=6
+T__6=7
+T__7=8
+T__8=9
+T__9=10
+T__10=11
+T__11=12
+T__12=13
+T__13=14
+T__14=15
+T__15=16
+SUB=17
+ADD=18
+MUL=19
+INT=20
+BOOL=21
+VOID=22
+IDENTIFIER=23
+Number=24
+WS=25
+';'=1
+'def'=2
+'('=3
+')'=4
+','=5
+'{'=6
+'}'=7
+'='=8
+'if'=9
+'else'=10
+'while'=11
+'return'=12
+'break'=13
+'continue'=14
+'true'=15
+'false'=16
+'-'=17
+'+'=18
+'*'=19
+'int'=20
+'bool'=21
+'void'=22
diff --git a/gen/DecafListener.java b/gen/DecafListener.java
new file mode 100644
index 0000000..b468cc5
--- /dev/null
+++ b/gen/DecafListener.java
@@ -0,0 +1,315 @@
+// Generated from C:/Users/laure/Documents/Dev/Compilerbau/LearningANTLR/UeBung2/AntlrAssignment3/src/main/antlr4/de/dhbw/horb/Decaf.g4 by ANTLR 4.13.1
+import org.antlr.v4.runtime.tree.ParseTreeListener;
+
+/**
+ * This interface defines a complete listener for a parse tree produced by
+ * {@link DecafParser}.
+ */
+public interface DecafListener extends ParseTreeListener {
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#program}.
+	 * @param ctx the parse tree
+	 */
+	void enterProgram(DecafParser.ProgramContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#program}.
+	 * @param ctx the parse tree
+	 */
+	void exitProgram(DecafParser.ProgramContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#var}.
+	 * @param ctx the parse tree
+	 */
+	void enterVar(DecafParser.VarContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#var}.
+	 * @param ctx the parse tree
+	 */
+	void exitVar(DecafParser.VarContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#type}.
+	 * @param ctx the parse tree
+	 */
+	void enterType(DecafParser.TypeContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#type}.
+	 * @param ctx the parse tree
+	 */
+	void exitType(DecafParser.TypeContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#func}.
+	 * @param ctx the parse tree
+	 */
+	void enterFunc(DecafParser.FuncContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#func}.
+	 * @param ctx the parse tree
+	 */
+	void exitFunc(DecafParser.FuncContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#params}.
+	 * @param ctx the parse tree
+	 */
+	void enterParams(DecafParser.ParamsContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#params}.
+	 * @param ctx the parse tree
+	 */
+	void exitParams(DecafParser.ParamsContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#param}.
+	 * @param ctx the parse tree
+	 */
+	void enterParam(DecafParser.ParamContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#param}.
+	 * @param ctx the parse tree
+	 */
+	void exitParam(DecafParser.ParamContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#block}.
+	 * @param ctx the parse tree
+	 */
+	void enterBlock(DecafParser.BlockContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#block}.
+	 * @param ctx the parse tree
+	 */
+	void exitBlock(DecafParser.BlockContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Assign}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterAssign(DecafParser.AssignContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Assign}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitAssign(DecafParser.AssignContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code FunctionCall}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterFunctionCall(DecafParser.FunctionCallContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code FunctionCall}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitFunctionCall(DecafParser.FunctionCallContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code If}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterIf(DecafParser.IfContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code If}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitIf(DecafParser.IfContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code While}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterWhile(DecafParser.WhileContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code While}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitWhile(DecafParser.WhileContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Return}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterReturn(DecafParser.ReturnContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Return}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitReturn(DecafParser.ReturnContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code ReturnVoid}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterReturnVoid(DecafParser.ReturnVoidContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code ReturnVoid}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitReturnVoid(DecafParser.ReturnVoidContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Break}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterBreak(DecafParser.BreakContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Break}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitBreak(DecafParser.BreakContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Continue}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterContinue(DecafParser.ContinueContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Continue}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitContinue(DecafParser.ContinueContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Expression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterExpression(DecafParser.ExpressionContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Expression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitExpression(DecafParser.ExpressionContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code FunCallExpression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterFunCallExpression(DecafParser.FunCallExpressionContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code FunCallExpression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitFunCallExpression(DecafParser.FunCallExpressionContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Constant}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterConstant(DecafParser.ConstantContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Constant}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitConstant(DecafParser.ConstantContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code BinaryOperation}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterBinaryOperation(DecafParser.BinaryOperationContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code BinaryOperation}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitBinaryOperation(DecafParser.BinaryOperationContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Location}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterLocation(DecafParser.LocationContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Location}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitLocation(DecafParser.LocationContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#binaryOp}.
+	 * @param ctx the parse tree
+	 */
+	void enterBinaryOp(DecafParser.BinaryOpContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#binaryOp}.
+	 * @param ctx the parse tree
+	 */
+	void exitBinaryOp(DecafParser.BinaryOpContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#loc}.
+	 * @param ctx the parse tree
+	 */
+	void enterLoc(DecafParser.LocContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#loc}.
+	 * @param ctx the parse tree
+	 */
+	void exitLoc(DecafParser.LocContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#funcCall}.
+	 * @param ctx the parse tree
+	 */
+	void enterFuncCall(DecafParser.FuncCallContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#funcCall}.
+	 * @param ctx the parse tree
+	 */
+	void exitFuncCall(DecafParser.FuncCallContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#args}.
+	 * @param ctx the parse tree
+	 */
+	void enterArgs(DecafParser.ArgsContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#args}.
+	 * @param ctx the parse tree
+	 */
+	void exitArgs(DecafParser.ArgsContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#literal}.
+	 * @param ctx the parse tree
+	 */
+	void enterLiteral(DecafParser.LiteralContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#literal}.
+	 * @param ctx the parse tree
+	 */
+	void exitLiteral(DecafParser.LiteralContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#boolean}.
+	 * @param ctx the parse tree
+	 */
+	void enterBoolean(DecafParser.BooleanContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#boolean}.
+	 * @param ctx the parse tree
+	 */
+	void exitBoolean(DecafParser.BooleanContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#number}.
+	 * @param ctx the parse tree
+	 */
+	void enterNumber(DecafParser.NumberContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#number}.
+	 * @param ctx the parse tree
+	 */
+	void exitNumber(DecafParser.NumberContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#id}.
+	 * @param ctx the parse tree
+	 */
+	void enterId(DecafParser.IdContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#id}.
+	 * @param ctx the parse tree
+	 */
+	void exitId(DecafParser.IdContext ctx);
+}
\ No newline at end of file
diff --git a/gen/DecafParser.java b/gen/DecafParser.java
new file mode 100644
index 0000000..6883f65
--- /dev/null
+++ b/gen/DecafParser.java
@@ -0,0 +1,1638 @@
+// Generated from C:/Users/laure/Documents/Dev/Compilerbau/LearningANTLR/UeBung2/AntlrAssignment3/src/main/antlr4/de/dhbw/horb/Decaf.g4 by ANTLR 4.13.1
+import org.antlr.v4.runtime.atn.*;
+import org.antlr.v4.runtime.dfa.DFA;
+import org.antlr.v4.runtime.*;
+import org.antlr.v4.runtime.misc.*;
+import org.antlr.v4.runtime.tree.*;
+import java.util.List;
+import java.util.Iterator;
+import java.util.ArrayList;
+
+@SuppressWarnings({"all", "warnings", "unchecked", "unused", "cast", "CheckReturnValue"})
+public class DecafParser extends Parser {
+	static { RuntimeMetaData.checkVersion("4.13.1", RuntimeMetaData.VERSION); }
+
+	protected static final DFA[] _decisionToDFA;
+	protected static final PredictionContextCache _sharedContextCache =
+		new PredictionContextCache();
+	public static final int
+		T__0=1, T__1=2, T__2=3, T__3=4, T__4=5, T__5=6, T__6=7, T__7=8, T__8=9, 
+		T__9=10, T__10=11, T__11=12, T__12=13, T__13=14, T__14=15, T__15=16, SUB=17, 
+		ADD=18, MUL=19, INT=20, BOOL=21, VOID=22, IDENTIFIER=23, Number=24, WS=25;
+	public static final int
+		RULE_program = 0, RULE_var = 1, RULE_type = 2, RULE_func = 3, RULE_params = 4, 
+		RULE_param = 5, RULE_block = 6, RULE_stmt = 7, RULE_expr = 8, RULE_binaryOp = 9, 
+		RULE_loc = 10, RULE_funcCall = 11, RULE_args = 12, RULE_literal = 13, 
+		RULE_boolean = 14, RULE_number = 15, RULE_id = 16;
+	private static String[] makeRuleNames() {
+		return new String[] {
+			"program", "var", "type", "func", "params", "param", "block", "stmt", 
+			"expr", "binaryOp", "loc", "funcCall", "args", "literal", "boolean", 
+			"number", "id"
+		};
+	}
+	public static final String[] ruleNames = makeRuleNames();
+
+	private static String[] makeLiteralNames() {
+		return new String[] {
+			null, "';'", "'def'", "'('", "')'", "','", "'{'", "'}'", "'='", "'if'", 
+			"'else'", "'while'", "'return'", "'break'", "'continue'", "'true'", "'false'", 
+			"'-'", "'+'", "'*'", "'int'", "'bool'", "'void'"
+		};
+	}
+	private static final String[] _LITERAL_NAMES = makeLiteralNames();
+	private static String[] makeSymbolicNames() {
+		return new String[] {
+			null, null, null, null, null, null, null, null, null, null, null, null, 
+			null, null, null, null, null, "SUB", "ADD", "MUL", "INT", "BOOL", "VOID", 
+			"IDENTIFIER", "Number", "WS"
+		};
+	}
+	private static final String[] _SYMBOLIC_NAMES = makeSymbolicNames();
+	public static final Vocabulary VOCABULARY = new VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);
+
+	/**
+	 * @deprecated Use {@link #VOCABULARY} instead.
+	 */
+	@Deprecated
+	public static final String[] tokenNames;
+	static {
+		tokenNames = new String[_SYMBOLIC_NAMES.length];
+		for (int i = 0; i < tokenNames.length; i++) {
+			tokenNames[i] = VOCABULARY.getLiteralName(i);
+			if (tokenNames[i] == null) {
+				tokenNames[i] = VOCABULARY.getSymbolicName(i);
+			}
+
+			if (tokenNames[i] == null) {
+				tokenNames[i] = "<INVALID>";
+			}
+		}
+	}
+
+	@Override
+	@Deprecated
+	public String[] getTokenNames() {
+		return tokenNames;
+	}
+
+	@Override
+
+	public Vocabulary getVocabulary() {
+		return VOCABULARY;
+	}
+
+	@Override
+	public String getGrammarFileName() { return "Decaf.g4"; }
+
+	@Override
+	public String[] getRuleNames() { return ruleNames; }
+
+	@Override
+	public String getSerializedATN() { return _serializedATN; }
+
+	@Override
+	public ATN getATN() { return _ATN; }
+
+	public DecafParser(TokenStream input) {
+		super(input);
+		_interp = new ParserATNSimulator(this,_ATN,_decisionToDFA,_sharedContextCache);
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class ProgramContext extends ParserRuleContext {
+		public List<VarContext> var() {
+			return getRuleContexts(VarContext.class);
+		}
+		public VarContext var(int i) {
+			return getRuleContext(VarContext.class,i);
+		}
+		public List<FuncContext> func() {
+			return getRuleContexts(FuncContext.class);
+		}
+		public FuncContext func(int i) {
+			return getRuleContext(FuncContext.class,i);
+		}
+		public ProgramContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_program; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterProgram(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitProgram(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitProgram(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ProgramContext program() throws RecognitionException {
+		ProgramContext _localctx = new ProgramContext(_ctx, getState());
+		enterRule(_localctx, 0, RULE_program);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(38);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while ((((_la) & ~0x3f) == 0 && ((1L << _la) & 7340036L) != 0)) {
+				{
+				setState(36);
+				_errHandler.sync(this);
+				switch (_input.LA(1)) {
+				case INT:
+				case BOOL:
+				case VOID:
+					{
+					setState(34);
+					var();
+					}
+					break;
+				case T__1:
+					{
+					setState(35);
+					func();
+					}
+					break;
+				default:
+					throw new NoViableAltException(this);
+				}
+				}
+				setState(40);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class VarContext extends ParserRuleContext {
+		public TypeContext type() {
+			return getRuleContext(TypeContext.class,0);
+		}
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public VarContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_var; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterVar(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitVar(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitVar(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final VarContext var() throws RecognitionException {
+		VarContext _localctx = new VarContext(_ctx, getState());
+		enterRule(_localctx, 2, RULE_var);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(41);
+			type();
+			setState(42);
+			id();
+			setState(43);
+			match(T__0);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class TypeContext extends ParserRuleContext {
+		public TerminalNode INT() { return getToken(DecafParser.INT, 0); }
+		public TerminalNode BOOL() { return getToken(DecafParser.BOOL, 0); }
+		public TerminalNode VOID() { return getToken(DecafParser.VOID, 0); }
+		public TypeContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_type; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterType(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitType(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitType(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final TypeContext type() throws RecognitionException {
+		TypeContext _localctx = new TypeContext(_ctx, getState());
+		enterRule(_localctx, 4, RULE_type);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(45);
+			_la = _input.LA(1);
+			if ( !((((_la) & ~0x3f) == 0 && ((1L << _la) & 7340032L) != 0)) ) {
+			_errHandler.recoverInline(this);
+			}
+			else {
+				if ( _input.LA(1)==Token.EOF ) matchedEOF = true;
+				_errHandler.reportMatch(this);
+				consume();
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class FuncContext extends ParserRuleContext {
+		public TypeContext type() {
+			return getRuleContext(TypeContext.class,0);
+		}
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public BlockContext block() {
+			return getRuleContext(BlockContext.class,0);
+		}
+		public ParamsContext params() {
+			return getRuleContext(ParamsContext.class,0);
+		}
+		public FuncContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_func; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterFunc(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitFunc(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitFunc(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final FuncContext func() throws RecognitionException {
+		FuncContext _localctx = new FuncContext(_ctx, getState());
+		enterRule(_localctx, 6, RULE_func);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(47);
+			match(T__1);
+			setState(48);
+			type();
+			setState(49);
+			id();
+			setState(50);
+			match(T__2);
+			setState(52);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			if ((((_la) & ~0x3f) == 0 && ((1L << _la) & 7340032L) != 0)) {
+				{
+				setState(51);
+				params();
+				}
+			}
+
+			setState(54);
+			match(T__3);
+			setState(55);
+			block();
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class ParamsContext extends ParserRuleContext {
+		public List<ParamContext> param() {
+			return getRuleContexts(ParamContext.class);
+		}
+		public ParamContext param(int i) {
+			return getRuleContext(ParamContext.class,i);
+		}
+		public ParamsContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_params; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterParams(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitParams(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitParams(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ParamsContext params() throws RecognitionException {
+		ParamsContext _localctx = new ParamsContext(_ctx, getState());
+		enterRule(_localctx, 8, RULE_params);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(57);
+			param();
+			setState(62);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while (_la==T__4) {
+				{
+				{
+				setState(58);
+				match(T__4);
+				setState(59);
+				param();
+				}
+				}
+				setState(64);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class ParamContext extends ParserRuleContext {
+		public TypeContext type() {
+			return getRuleContext(TypeContext.class,0);
+		}
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public ParamContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_param; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterParam(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitParam(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitParam(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ParamContext param() throws RecognitionException {
+		ParamContext _localctx = new ParamContext(_ctx, getState());
+		enterRule(_localctx, 10, RULE_param);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(65);
+			type();
+			setState(66);
+			id();
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class BlockContext extends ParserRuleContext {
+		public List<VarContext> var() {
+			return getRuleContexts(VarContext.class);
+		}
+		public VarContext var(int i) {
+			return getRuleContext(VarContext.class,i);
+		}
+		public List<StmtContext> stmt() {
+			return getRuleContexts(StmtContext.class);
+		}
+		public StmtContext stmt(int i) {
+			return getRuleContext(StmtContext.class,i);
+		}
+		public BlockContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_block; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterBlock(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitBlock(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitBlock(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final BlockContext block() throws RecognitionException {
+		BlockContext _localctx = new BlockContext(_ctx, getState());
+		enterRule(_localctx, 12, RULE_block);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(68);
+			match(T__5);
+			setState(72);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while ((((_la) & ~0x3f) == 0 && ((1L << _la) & 7340032L) != 0)) {
+				{
+				{
+				setState(69);
+				var();
+				}
+				}
+				setState(74);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			setState(78);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while ((((_la) & ~0x3f) == 0 && ((1L << _la) & 8419840L) != 0)) {
+				{
+				{
+				setState(75);
+				stmt();
+				}
+				}
+				setState(80);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			setState(81);
+			match(T__6);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class StmtContext extends ParserRuleContext {
+		public StmtContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_stmt; }
+	 
+		public StmtContext() { }
+		public void copyFrom(StmtContext ctx) {
+			super.copyFrom(ctx);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class ReturnVoidContext extends StmtContext {
+		public ReturnVoidContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterReturnVoid(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitReturnVoid(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitReturnVoid(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class ReturnContext extends StmtContext {
+		public ExprContext expr() {
+			return getRuleContext(ExprContext.class,0);
+		}
+		public ReturnContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterReturn(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitReturn(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitReturn(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class BreakContext extends StmtContext {
+		public BreakContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterBreak(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitBreak(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitBreak(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class AssignContext extends StmtContext {
+		public LocContext loc() {
+			return getRuleContext(LocContext.class,0);
+		}
+		public ExprContext expr() {
+			return getRuleContext(ExprContext.class,0);
+		}
+		public AssignContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterAssign(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitAssign(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitAssign(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class FunctionCallContext extends StmtContext {
+		public FuncCallContext funcCall() {
+			return getRuleContext(FuncCallContext.class,0);
+		}
+		public FunctionCallContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterFunctionCall(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitFunctionCall(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitFunctionCall(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class WhileContext extends StmtContext {
+		public ExprContext expr() {
+			return getRuleContext(ExprContext.class,0);
+		}
+		public BlockContext block() {
+			return getRuleContext(BlockContext.class,0);
+		}
+		public WhileContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterWhile(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitWhile(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitWhile(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class ContinueContext extends StmtContext {
+		public ContinueContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterContinue(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitContinue(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitContinue(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class IfContext extends StmtContext {
+		public ExprContext expr() {
+			return getRuleContext(ExprContext.class,0);
+		}
+		public List<BlockContext> block() {
+			return getRuleContexts(BlockContext.class);
+		}
+		public BlockContext block(int i) {
+			return getRuleContext(BlockContext.class,i);
+		}
+		public IfContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterIf(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitIf(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitIf(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final StmtContext stmt() throws RecognitionException {
+		StmtContext _localctx = new StmtContext(_ctx, getState());
+		enterRule(_localctx, 14, RULE_stmt);
+		int _la;
+		try {
+			setState(116);
+			_errHandler.sync(this);
+			switch ( getInterpreter().adaptivePredict(_input,7,_ctx) ) {
+			case 1:
+				_localctx = new AssignContext(_localctx);
+				enterOuterAlt(_localctx, 1);
+				{
+				setState(83);
+				loc();
+				setState(84);
+				match(T__7);
+				setState(85);
+				expr(0);
+				setState(86);
+				match(T__0);
+				}
+				break;
+			case 2:
+				_localctx = new FunctionCallContext(_localctx);
+				enterOuterAlt(_localctx, 2);
+				{
+				setState(88);
+				funcCall();
+				setState(89);
+				match(T__0);
+				}
+				break;
+			case 3:
+				_localctx = new IfContext(_localctx);
+				enterOuterAlt(_localctx, 3);
+				{
+				setState(91);
+				match(T__8);
+				setState(92);
+				match(T__2);
+				setState(93);
+				expr(0);
+				setState(94);
+				match(T__3);
+				setState(95);
+				block();
+				setState(98);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+				if (_la==T__9) {
+					{
+					setState(96);
+					match(T__9);
+					setState(97);
+					block();
+					}
+				}
+
+				}
+				break;
+			case 4:
+				_localctx = new WhileContext(_localctx);
+				enterOuterAlt(_localctx, 4);
+				{
+				setState(100);
+				match(T__10);
+				setState(101);
+				match(T__2);
+				setState(102);
+				expr(0);
+				setState(103);
+				match(T__3);
+				setState(104);
+				block();
+				}
+				break;
+			case 5:
+				_localctx = new ReturnContext(_localctx);
+				enterOuterAlt(_localctx, 5);
+				{
+				setState(106);
+				match(T__11);
+				setState(107);
+				expr(0);
+				setState(108);
+				match(T__0);
+				}
+				break;
+			case 6:
+				_localctx = new ReturnVoidContext(_localctx);
+				enterOuterAlt(_localctx, 6);
+				{
+				setState(110);
+				match(T__11);
+				setState(111);
+				match(T__0);
+				}
+				break;
+			case 7:
+				_localctx = new BreakContext(_localctx);
+				enterOuterAlt(_localctx, 7);
+				{
+				setState(112);
+				match(T__12);
+				setState(113);
+				match(T__0);
+				}
+				break;
+			case 8:
+				_localctx = new ContinueContext(_localctx);
+				enterOuterAlt(_localctx, 8);
+				{
+				setState(114);
+				match(T__13);
+				setState(115);
+				match(T__0);
+				}
+				break;
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class ExprContext extends ParserRuleContext {
+		public ExprContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_expr; }
+	 
+		public ExprContext() { }
+		public void copyFrom(ExprContext ctx) {
+			super.copyFrom(ctx);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class ExpressionContext extends ExprContext {
+		public ExprContext expr() {
+			return getRuleContext(ExprContext.class,0);
+		}
+		public ExpressionContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterExpression(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitExpression(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitExpression(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class FunCallExpressionContext extends ExprContext {
+		public FuncCallContext funcCall() {
+			return getRuleContext(FuncCallContext.class,0);
+		}
+		public FunCallExpressionContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterFunCallExpression(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitFunCallExpression(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitFunCallExpression(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class ConstantContext extends ExprContext {
+		public LiteralContext literal() {
+			return getRuleContext(LiteralContext.class,0);
+		}
+		public ConstantContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterConstant(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitConstant(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitConstant(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class BinaryOperationContext extends ExprContext {
+		public List<ExprContext> expr() {
+			return getRuleContexts(ExprContext.class);
+		}
+		public ExprContext expr(int i) {
+			return getRuleContext(ExprContext.class,i);
+		}
+		public BinaryOpContext binaryOp() {
+			return getRuleContext(BinaryOpContext.class,0);
+		}
+		public BinaryOperationContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterBinaryOperation(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitBinaryOperation(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitBinaryOperation(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class LocationContext extends ExprContext {
+		public LocContext loc() {
+			return getRuleContext(LocContext.class,0);
+		}
+		public LocationContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterLocation(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitLocation(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitLocation(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ExprContext expr() throws RecognitionException {
+		return expr(0);
+	}
+
+	private ExprContext expr(int _p) throws RecognitionException {
+		ParserRuleContext _parentctx = _ctx;
+		int _parentState = getState();
+		ExprContext _localctx = new ExprContext(_ctx, _parentState);
+		ExprContext _prevctx = _localctx;
+		int _startState = 16;
+		enterRecursionRule(_localctx, 16, RULE_expr, _p);
+		try {
+			int _alt;
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(126);
+			_errHandler.sync(this);
+			switch ( getInterpreter().adaptivePredict(_input,8,_ctx) ) {
+			case 1:
+				{
+				_localctx = new ConstantContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+
+				setState(119);
+				literal();
+				}
+				break;
+			case 2:
+				{
+				_localctx = new ExpressionContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+				setState(120);
+				match(T__2);
+				setState(121);
+				expr(0);
+				setState(122);
+				match(T__3);
+				}
+				break;
+			case 3:
+				{
+				_localctx = new FunCallExpressionContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+				setState(124);
+				funcCall();
+				}
+				break;
+			case 4:
+				{
+				_localctx = new LocationContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+				setState(125);
+				loc();
+				}
+				break;
+			}
+			_ctx.stop = _input.LT(-1);
+			setState(134);
+			_errHandler.sync(this);
+			_alt = getInterpreter().adaptivePredict(_input,9,_ctx);
+			while ( _alt!=2 && _alt!=org.antlr.v4.runtime.atn.ATN.INVALID_ALT_NUMBER ) {
+				if ( _alt==1 ) {
+					if ( _parseListeners!=null ) triggerExitRuleEvent();
+					_prevctx = _localctx;
+					{
+					{
+					_localctx = new BinaryOperationContext(new ExprContext(_parentctx, _parentState));
+					pushNewRecursionContext(_localctx, _startState, RULE_expr);
+					setState(128);
+					if (!(precpred(_ctx, 5))) throw new FailedPredicateException(this, "precpred(_ctx, 5)");
+					setState(129);
+					binaryOp();
+					setState(130);
+					expr(6);
+					}
+					} 
+				}
+				setState(136);
+				_errHandler.sync(this);
+				_alt = getInterpreter().adaptivePredict(_input,9,_ctx);
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			unrollRecursionContexts(_parentctx);
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class BinaryOpContext extends ParserRuleContext {
+		public TerminalNode ADD() { return getToken(DecafParser.ADD, 0); }
+		public TerminalNode SUB() { return getToken(DecafParser.SUB, 0); }
+		public TerminalNode MUL() { return getToken(DecafParser.MUL, 0); }
+		public BinaryOpContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_binaryOp; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterBinaryOp(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitBinaryOp(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitBinaryOp(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final BinaryOpContext binaryOp() throws RecognitionException {
+		BinaryOpContext _localctx = new BinaryOpContext(_ctx, getState());
+		enterRule(_localctx, 18, RULE_binaryOp);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(137);
+			_la = _input.LA(1);
+			if ( !((((_la) & ~0x3f) == 0 && ((1L << _la) & 917504L) != 0)) ) {
+			_errHandler.recoverInline(this);
+			}
+			else {
+				if ( _input.LA(1)==Token.EOF ) matchedEOF = true;
+				_errHandler.reportMatch(this);
+				consume();
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class LocContext extends ParserRuleContext {
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public LocContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_loc; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterLoc(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitLoc(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitLoc(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final LocContext loc() throws RecognitionException {
+		LocContext _localctx = new LocContext(_ctx, getState());
+		enterRule(_localctx, 20, RULE_loc);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(139);
+			id();
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class FuncCallContext extends ParserRuleContext {
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public ArgsContext args() {
+			return getRuleContext(ArgsContext.class,0);
+		}
+		public FuncCallContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_funcCall; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterFuncCall(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitFuncCall(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitFuncCall(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final FuncCallContext funcCall() throws RecognitionException {
+		FuncCallContext _localctx = new FuncCallContext(_ctx, getState());
+		enterRule(_localctx, 22, RULE_funcCall);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(141);
+			id();
+			setState(142);
+			match(T__2);
+			setState(144);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			if ((((_la) & ~0x3f) == 0 && ((1L << _la) & 25264136L) != 0)) {
+				{
+				setState(143);
+				args();
+				}
+			}
+
+			setState(146);
+			match(T__3);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class ArgsContext extends ParserRuleContext {
+		public List<ExprContext> expr() {
+			return getRuleContexts(ExprContext.class);
+		}
+		public ExprContext expr(int i) {
+			return getRuleContext(ExprContext.class,i);
+		}
+		public ArgsContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_args; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterArgs(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitArgs(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitArgs(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ArgsContext args() throws RecognitionException {
+		ArgsContext _localctx = new ArgsContext(_ctx, getState());
+		enterRule(_localctx, 24, RULE_args);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(148);
+			expr(0);
+			setState(153);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while (_la==T__4) {
+				{
+				{
+				setState(149);
+				match(T__4);
+				setState(150);
+				expr(0);
+				}
+				}
+				setState(155);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class LiteralContext extends ParserRuleContext {
+		public NumberContext number() {
+			return getRuleContext(NumberContext.class,0);
+		}
+		public BooleanContext boolean_() {
+			return getRuleContext(BooleanContext.class,0);
+		}
+		public LiteralContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_literal; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterLiteral(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitLiteral(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitLiteral(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final LiteralContext literal() throws RecognitionException {
+		LiteralContext _localctx = new LiteralContext(_ctx, getState());
+		enterRule(_localctx, 26, RULE_literal);
+		try {
+			setState(158);
+			_errHandler.sync(this);
+			switch (_input.LA(1)) {
+			case Number:
+				enterOuterAlt(_localctx, 1);
+				{
+				setState(156);
+				number();
+				}
+				break;
+			case T__14:
+			case T__15:
+				enterOuterAlt(_localctx, 2);
+				{
+				setState(157);
+				boolean_();
+				}
+				break;
+			default:
+				throw new NoViableAltException(this);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class BooleanContext extends ParserRuleContext {
+		public BooleanContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_boolean; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterBoolean(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitBoolean(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitBoolean(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final BooleanContext boolean_() throws RecognitionException {
+		BooleanContext _localctx = new BooleanContext(_ctx, getState());
+		enterRule(_localctx, 28, RULE_boolean);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(160);
+			_la = _input.LA(1);
+			if ( !(_la==T__14 || _la==T__15) ) {
+			_errHandler.recoverInline(this);
+			}
+			else {
+				if ( _input.LA(1)==Token.EOF ) matchedEOF = true;
+				_errHandler.reportMatch(this);
+				consume();
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class NumberContext extends ParserRuleContext {
+		public TerminalNode Number() { return getToken(DecafParser.Number, 0); }
+		public NumberContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_number; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterNumber(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitNumber(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitNumber(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final NumberContext number() throws RecognitionException {
+		NumberContext _localctx = new NumberContext(_ctx, getState());
+		enterRule(_localctx, 30, RULE_number);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(162);
+			match(Number);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class IdContext extends ParserRuleContext {
+		public TerminalNode IDENTIFIER() { return getToken(DecafParser.IDENTIFIER, 0); }
+		public IdContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_id; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterId(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitId(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitId(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final IdContext id() throws RecognitionException {
+		IdContext _localctx = new IdContext(_ctx, getState());
+		enterRule(_localctx, 32, RULE_id);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(164);
+			match(IDENTIFIER);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public boolean sempred(RuleContext _localctx, int ruleIndex, int predIndex) {
+		switch (ruleIndex) {
+		case 8:
+			return expr_sempred((ExprContext)_localctx, predIndex);
+		}
+		return true;
+	}
+	private boolean expr_sempred(ExprContext _localctx, int predIndex) {
+		switch (predIndex) {
+		case 0:
+			return precpred(_ctx, 5);
+		}
+		return true;
+	}
+
+	public static final String _serializedATN =
+		"\u0004\u0001\u0019\u00a7\u0002\u0000\u0007\u0000\u0002\u0001\u0007\u0001"+
+		"\u0002\u0002\u0007\u0002\u0002\u0003\u0007\u0003\u0002\u0004\u0007\u0004"+
+		"\u0002\u0005\u0007\u0005\u0002\u0006\u0007\u0006\u0002\u0007\u0007\u0007"+
+		"\u0002\b\u0007\b\u0002\t\u0007\t\u0002\n\u0007\n\u0002\u000b\u0007\u000b"+
+		"\u0002\f\u0007\f\u0002\r\u0007\r\u0002\u000e\u0007\u000e\u0002\u000f\u0007"+
+		"\u000f\u0002\u0010\u0007\u0010\u0001\u0000\u0001\u0000\u0005\u0000%\b"+
+		"\u0000\n\u0000\f\u0000(\t\u0000\u0001\u0001\u0001\u0001\u0001\u0001\u0001"+
+		"\u0001\u0001\u0002\u0001\u0002\u0001\u0003\u0001\u0003\u0001\u0003\u0001"+
+		"\u0003\u0001\u0003\u0003\u00035\b\u0003\u0001\u0003\u0001\u0003\u0001"+
+		"\u0003\u0001\u0004\u0001\u0004\u0001\u0004\u0005\u0004=\b\u0004\n\u0004"+
+		"\f\u0004@\t\u0004\u0001\u0005\u0001\u0005\u0001\u0005\u0001\u0006\u0001"+
+		"\u0006\u0005\u0006G\b\u0006\n\u0006\f\u0006J\t\u0006\u0001\u0006\u0005"+
+		"\u0006M\b\u0006\n\u0006\f\u0006P\t\u0006\u0001\u0006\u0001\u0006\u0001"+
+		"\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001"+
+		"\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001"+
+		"\u0007\u0001\u0007\u0001\u0007\u0003\u0007c\b\u0007\u0001\u0007\u0001"+
+		"\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001"+
+		"\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001"+
+		"\u0007\u0001\u0007\u0001\u0007\u0003\u0007u\b\u0007\u0001\b\u0001\b\u0001"+
+		"\b\u0001\b\u0001\b\u0001\b\u0001\b\u0001\b\u0003\b\u007f\b\b\u0001\b\u0001"+
+		"\b\u0001\b\u0001\b\u0005\b\u0085\b\b\n\b\f\b\u0088\t\b\u0001\t\u0001\t"+
+		"\u0001\n\u0001\n\u0001\u000b\u0001\u000b\u0001\u000b\u0003\u000b\u0091"+
+		"\b\u000b\u0001\u000b\u0001\u000b\u0001\f\u0001\f\u0001\f\u0005\f\u0098"+
+		"\b\f\n\f\f\f\u009b\t\f\u0001\r\u0001\r\u0003\r\u009f\b\r\u0001\u000e\u0001"+
+		"\u000e\u0001\u000f\u0001\u000f\u0001\u0010\u0001\u0010\u0001\u0010\u0000"+
+		"\u0001\u0010\u0011\u0000\u0002\u0004\u0006\b\n\f\u000e\u0010\u0012\u0014"+
+		"\u0016\u0018\u001a\u001c\u001e \u0000\u0003\u0001\u0000\u0014\u0016\u0001"+
+		"\u0000\u0011\u0013\u0001\u0000\u000f\u0010\u00aa\u0000&\u0001\u0000\u0000"+
+		"\u0000\u0002)\u0001\u0000\u0000\u0000\u0004-\u0001\u0000\u0000\u0000\u0006"+
+		"/\u0001\u0000\u0000\u0000\b9\u0001\u0000\u0000\u0000\nA\u0001\u0000\u0000"+
+		"\u0000\fD\u0001\u0000\u0000\u0000\u000et\u0001\u0000\u0000\u0000\u0010"+
+		"~\u0001\u0000\u0000\u0000\u0012\u0089\u0001\u0000\u0000\u0000\u0014\u008b"+
+		"\u0001\u0000\u0000\u0000\u0016\u008d\u0001\u0000\u0000\u0000\u0018\u0094"+
+		"\u0001\u0000\u0000\u0000\u001a\u009e\u0001\u0000\u0000\u0000\u001c\u00a0"+
+		"\u0001\u0000\u0000\u0000\u001e\u00a2\u0001\u0000\u0000\u0000 \u00a4\u0001"+
+		"\u0000\u0000\u0000\"%\u0003\u0002\u0001\u0000#%\u0003\u0006\u0003\u0000"+
+		"$\"\u0001\u0000\u0000\u0000$#\u0001\u0000\u0000\u0000%(\u0001\u0000\u0000"+
+		"\u0000&$\u0001\u0000\u0000\u0000&\'\u0001\u0000\u0000\u0000\'\u0001\u0001"+
+		"\u0000\u0000\u0000(&\u0001\u0000\u0000\u0000)*\u0003\u0004\u0002\u0000"+
+		"*+\u0003 \u0010\u0000+,\u0005\u0001\u0000\u0000,\u0003\u0001\u0000\u0000"+
+		"\u0000-.\u0007\u0000\u0000\u0000.\u0005\u0001\u0000\u0000\u0000/0\u0005"+
+		"\u0002\u0000\u000001\u0003\u0004\u0002\u000012\u0003 \u0010\u000024\u0005"+
+		"\u0003\u0000\u000035\u0003\b\u0004\u000043\u0001\u0000\u0000\u000045\u0001"+
+		"\u0000\u0000\u000056\u0001\u0000\u0000\u000067\u0005\u0004\u0000\u0000"+
+		"78\u0003\f\u0006\u00008\u0007\u0001\u0000\u0000\u00009>\u0003\n\u0005"+
+		"\u0000:;\u0005\u0005\u0000\u0000;=\u0003\n\u0005\u0000<:\u0001\u0000\u0000"+
+		"\u0000=@\u0001\u0000\u0000\u0000><\u0001\u0000\u0000\u0000>?\u0001\u0000"+
+		"\u0000\u0000?\t\u0001\u0000\u0000\u0000@>\u0001\u0000\u0000\u0000AB\u0003"+
+		"\u0004\u0002\u0000BC\u0003 \u0010\u0000C\u000b\u0001\u0000\u0000\u0000"+
+		"DH\u0005\u0006\u0000\u0000EG\u0003\u0002\u0001\u0000FE\u0001\u0000\u0000"+
+		"\u0000GJ\u0001\u0000\u0000\u0000HF\u0001\u0000\u0000\u0000HI\u0001\u0000"+
+		"\u0000\u0000IN\u0001\u0000\u0000\u0000JH\u0001\u0000\u0000\u0000KM\u0003"+
+		"\u000e\u0007\u0000LK\u0001\u0000\u0000\u0000MP\u0001\u0000\u0000\u0000"+
+		"NL\u0001\u0000\u0000\u0000NO\u0001\u0000\u0000\u0000OQ\u0001\u0000\u0000"+
+		"\u0000PN\u0001\u0000\u0000\u0000QR\u0005\u0007\u0000\u0000R\r\u0001\u0000"+
+		"\u0000\u0000ST\u0003\u0014\n\u0000TU\u0005\b\u0000\u0000UV\u0003\u0010"+
+		"\b\u0000VW\u0005\u0001\u0000\u0000Wu\u0001\u0000\u0000\u0000XY\u0003\u0016"+
+		"\u000b\u0000YZ\u0005\u0001\u0000\u0000Zu\u0001\u0000\u0000\u0000[\\\u0005"+
+		"\t\u0000\u0000\\]\u0005\u0003\u0000\u0000]^\u0003\u0010\b\u0000^_\u0005"+
+		"\u0004\u0000\u0000_b\u0003\f\u0006\u0000`a\u0005\n\u0000\u0000ac\u0003"+
+		"\f\u0006\u0000b`\u0001\u0000\u0000\u0000bc\u0001\u0000\u0000\u0000cu\u0001"+
+		"\u0000\u0000\u0000de\u0005\u000b\u0000\u0000ef\u0005\u0003\u0000\u0000"+
+		"fg\u0003\u0010\b\u0000gh\u0005\u0004\u0000\u0000hi\u0003\f\u0006\u0000"+
+		"iu\u0001\u0000\u0000\u0000jk\u0005\f\u0000\u0000kl\u0003\u0010\b\u0000"+
+		"lm\u0005\u0001\u0000\u0000mu\u0001\u0000\u0000\u0000no\u0005\f\u0000\u0000"+
+		"ou\u0005\u0001\u0000\u0000pq\u0005\r\u0000\u0000qu\u0005\u0001\u0000\u0000"+
+		"rs\u0005\u000e\u0000\u0000su\u0005\u0001\u0000\u0000tS\u0001\u0000\u0000"+
+		"\u0000tX\u0001\u0000\u0000\u0000t[\u0001\u0000\u0000\u0000td\u0001\u0000"+
+		"\u0000\u0000tj\u0001\u0000\u0000\u0000tn\u0001\u0000\u0000\u0000tp\u0001"+
+		"\u0000\u0000\u0000tr\u0001\u0000\u0000\u0000u\u000f\u0001\u0000\u0000"+
+		"\u0000vw\u0006\b\uffff\uffff\u0000w\u007f\u0003\u001a\r\u0000xy\u0005"+
+		"\u0003\u0000\u0000yz\u0003\u0010\b\u0000z{\u0005\u0004\u0000\u0000{\u007f"+
+		"\u0001\u0000\u0000\u0000|\u007f\u0003\u0016\u000b\u0000}\u007f\u0003\u0014"+
+		"\n\u0000~v\u0001\u0000\u0000\u0000~x\u0001\u0000\u0000\u0000~|\u0001\u0000"+
+		"\u0000\u0000~}\u0001\u0000\u0000\u0000\u007f\u0086\u0001\u0000\u0000\u0000"+
+		"\u0080\u0081\n\u0005\u0000\u0000\u0081\u0082\u0003\u0012\t\u0000\u0082"+
+		"\u0083\u0003\u0010\b\u0006\u0083\u0085\u0001\u0000\u0000\u0000\u0084\u0080"+
+		"\u0001\u0000\u0000\u0000\u0085\u0088\u0001\u0000\u0000\u0000\u0086\u0084"+
+		"\u0001\u0000\u0000\u0000\u0086\u0087\u0001\u0000\u0000\u0000\u0087\u0011"+
+		"\u0001\u0000\u0000\u0000\u0088\u0086\u0001\u0000\u0000\u0000\u0089\u008a"+
+		"\u0007\u0001\u0000\u0000\u008a\u0013\u0001\u0000\u0000\u0000\u008b\u008c"+
+		"\u0003 \u0010\u0000\u008c\u0015\u0001\u0000\u0000\u0000\u008d\u008e\u0003"+
+		" \u0010\u0000\u008e\u0090\u0005\u0003\u0000\u0000\u008f\u0091\u0003\u0018"+
+		"\f\u0000\u0090\u008f\u0001\u0000\u0000\u0000\u0090\u0091\u0001\u0000\u0000"+
+		"\u0000\u0091\u0092\u0001\u0000\u0000\u0000\u0092\u0093\u0005\u0004\u0000"+
+		"\u0000\u0093\u0017\u0001\u0000\u0000\u0000\u0094\u0099\u0003\u0010\b\u0000"+
+		"\u0095\u0096\u0005\u0005\u0000\u0000\u0096\u0098\u0003\u0010\b\u0000\u0097"+
+		"\u0095\u0001\u0000\u0000\u0000\u0098\u009b\u0001\u0000\u0000\u0000\u0099"+
+		"\u0097\u0001\u0000\u0000\u0000\u0099\u009a\u0001\u0000\u0000\u0000\u009a"+
+		"\u0019\u0001\u0000\u0000\u0000\u009b\u0099\u0001\u0000\u0000\u0000\u009c"+
+		"\u009f\u0003\u001e\u000f\u0000\u009d\u009f\u0003\u001c\u000e\u0000\u009e"+
+		"\u009c\u0001\u0000\u0000\u0000\u009e\u009d\u0001\u0000\u0000\u0000\u009f"+
+		"\u001b\u0001\u0000\u0000\u0000\u00a0\u00a1\u0007\u0002\u0000\u0000\u00a1"+
+		"\u001d\u0001\u0000\u0000\u0000\u00a2\u00a3\u0005\u0018\u0000\u0000\u00a3"+
+		"\u001f\u0001\u0000\u0000\u0000\u00a4\u00a5\u0005\u0017\u0000\u0000\u00a5"+
+		"!\u0001\u0000\u0000\u0000\r$&4>HNbt~\u0086\u0090\u0099\u009e";
+	public static final ATN _ATN =
+		new ATNDeserializer().deserialize(_serializedATN.toCharArray());
+	static {
+		_decisionToDFA = new DFA[_ATN.getNumberOfDecisions()];
+		for (int i = 0; i < _ATN.getNumberOfDecisions(); i++) {
+			_decisionToDFA[i] = new DFA(_ATN.getDecisionState(i), i);
+		}
+	}
+}
\ No newline at end of file
diff --git a/gen/DecafVisitor.java b/gen/DecafVisitor.java
new file mode 100644
index 0000000..e523b87
--- /dev/null
+++ b/gen/DecafVisitor.java
@@ -0,0 +1,193 @@
+// Generated from C:/Users/laure/Documents/Dev/Compilerbau/LearningANTLR/UeBung2/AntlrAssignment3/src/main/antlr4/de/dhbw/horb/Decaf.g4 by ANTLR 4.13.1
+import org.antlr.v4.runtime.tree.ParseTreeVisitor;
+
+/**
+ * This interface defines a complete generic visitor for a parse tree produced
+ * by {@link DecafParser}.
+ *
+ * @param <T> The return type of the visit operation. Use {@link Void} for
+ * operations with no return type.
+ */
+public interface DecafVisitor<T> extends ParseTreeVisitor<T> {
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#program}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitProgram(DecafParser.ProgramContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#var}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitVar(DecafParser.VarContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#type}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitType(DecafParser.TypeContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#func}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitFunc(DecafParser.FuncContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#params}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitParams(DecafParser.ParamsContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#param}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitParam(DecafParser.ParamContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#block}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitBlock(DecafParser.BlockContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Assign}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitAssign(DecafParser.AssignContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code FunctionCall}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitFunctionCall(DecafParser.FunctionCallContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code If}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitIf(DecafParser.IfContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code While}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitWhile(DecafParser.WhileContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Return}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitReturn(DecafParser.ReturnContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code ReturnVoid}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitReturnVoid(DecafParser.ReturnVoidContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Break}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitBreak(DecafParser.BreakContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Continue}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitContinue(DecafParser.ContinueContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Expression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitExpression(DecafParser.ExpressionContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code FunCallExpression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitFunCallExpression(DecafParser.FunCallExpressionContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Constant}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitConstant(DecafParser.ConstantContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code BinaryOperation}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitBinaryOperation(DecafParser.BinaryOperationContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Location}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitLocation(DecafParser.LocationContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#binaryOp}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitBinaryOp(DecafParser.BinaryOpContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#loc}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitLoc(DecafParser.LocContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#funcCall}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitFuncCall(DecafParser.FuncCallContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#args}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitArgs(DecafParser.ArgsContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#literal}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitLiteral(DecafParser.LiteralContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#boolean}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitBoolean(DecafParser.BooleanContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#number}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitNumber(DecafParser.NumberContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#id}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitId(DecafParser.IdContext ctx);
+}
\ No newline at end of file
diff --git a/src/main/java/de/dhbw/horb/ASTGenerator.java b/src/main/java/de/dhbw/horb/ASTGenerator.java
index d0802eb..ce492c4 100644
--- a/src/main/java/de/dhbw/horb/ASTGenerator.java
+++ b/src/main/java/de/dhbw/horb/ASTGenerator.java
@@ -28,7 +28,14 @@ public class ASTGenerator {
     }
 
     public static Function generateFunc(DecafParser.FuncContext ctx) {
-        throw new RuntimeException("TODO");
+        List<Variable> variableList = new ArrayList<>();
+        if (ctx.params() != null){
+            for (DecafParser.ParamContext paramContext : ctx.params().param()) {
+                variableList.add(new Variable(paramContext.id().getText(),getType(paramContext.type())));
+            }
+        }
+        StatementGenerator statementGenerator = new StatementGenerator();
+        return new Function(getType(ctx.type()),ctx.id().getText(), variableList, statementGenerator.generateBlock(ctx.block()));
     }
 
     public static Type getType(DecafParser.TypeContext ctx){
diff --git a/src/main/java/de/dhbw/horb/Compiler.java b/src/main/java/de/dhbw/horb/Compiler.java
index 3562d1a..dde0231 100644
--- a/src/main/java/de/dhbw/horb/Compiler.java
+++ b/src/main/java/de/dhbw/horb/Compiler.java
@@ -1,14 +1,12 @@
 package de.dhbw.horb;
 
-import de.dhbw.horb.ast.*;
+import de.dhbw.horb.ast.DecafLexer;
+import de.dhbw.horb.ast.DecafParser;
+import de.dhbw.horb.ast.Program;
 import org.antlr.v4.runtime.CharStream;
 import org.antlr.v4.runtime.CharStreams;
 import org.antlr.v4.runtime.CommonTokenStream;
 
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
-
 /**
  * Decaf language Compiler
  */
diff --git a/src/main/java/de/dhbw/horb/ExpressionGenerator.java b/src/main/java/de/dhbw/horb/ExpressionGenerator.java
index 9c13f3b..755698f 100644
--- a/src/main/java/de/dhbw/horb/ExpressionGenerator.java
+++ b/src/main/java/de/dhbw/horb/ExpressionGenerator.java
@@ -2,54 +2,73 @@ package de.dhbw.horb;
 
 import de.dhbw.horb.ast.*;
 
-public class ExpressionGenerator extends de.dhbw.horb.DecafBaseVisitor<Expression> {
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class ExpressionGenerator extends DecafBaseVisitor<Expression> {
     @Override
-    public Expression visitBinaryOperation(de.dhbw.horb.DecafParser.BinaryOperationContext ctx) {
+    public Expression visitBinaryOperation(DecafParser.BinaryOperationContext ctx) {
         return generateBinary(ctx);
     }
 
     @Override
-    public Expression visitFunCallExpression(de.dhbw.horb.DecafParser.FunCallExpressionContext ctx) {
-        throw new RuntimeException("TODO");
+    public Expression visitFunCallExpression(DecafParser.FunCallExpressionContext ctx) {
+        return generateFuncCallExpression(ctx);
     }
 
     @Override
-    public Expression visitConstant(de.dhbw.horb.DecafParser.ConstantContext ctx) {
+    public Expression visitConstant(DecafParser.ConstantContext ctx) {
         return generateConstant(ctx.literal());
     }
 
     @Override
-    public Expression visitExpression(de.dhbw.horb.DecafParser.ExpressionContext ctx) {
+    public Expression visitExpression(DecafParser.ExpressionContext ctx) {
         //ParseTree for ( expr )
         //Just pass it down to the inner expr:
         return this.visit(ctx.expr());
     }
 
     @Override
-    public Expression visitLocation(de.dhbw.horb.DecafParser.LocationContext ctx) {
+    public Expression visitLocation(DecafParser.LocationContext ctx) {
         return generateLocation(ctx.loc());
     }
 
-    public static Expression generateConstant(de.dhbw.horb.DecafParser.LiteralContext ctx){
+    public static Expression generateConstant(DecafParser.LiteralContext ctx){
         if(ctx.number() != null)
             return new IntConstant(Integer.valueOf(ctx.number().getText()));
         if(ctx.boolean_() != null)
             return new BoolConstant(Boolean.valueOf(ctx.boolean_().getText()));
         throw new RuntimeException();
     }
-    public static Operator generateOperator(de.dhbw.horb.DecafParser.BinaryOpContext ctx){
+    public  Expression generateFuncCallExpression(DecafParser.FunCallExpressionContext ctx){
+        return new FunctionCall(ctx.funcCall().id().getText(), generateArgs(ctx.funcCall().args()));
+    }
+
+    public List<Expression> generateArgs(DecafParser.ArgsContext args) {
+        if(args == null){
+            return Collections.emptyList();
+        }
+       List<Expression> expressionList = new ArrayList<>();
+        for (DecafParser.ExprContext exprContext : args.expr()) {
+           expressionList.add(exprContext.accept(this));
+        }
+        return expressionList;
+    }
+
+    public static Operator generateOperator(DecafParser.BinaryOpContext ctx){
         if(ctx.ADD() != null)return Operator.ADD;
         if(ctx.SUB() != null)return Operator.SUB;
         if(ctx.MUL() != null)return Operator.MUL;
         throw new RuntimeException();
     }
-    public static Binary generateBinary(de.dhbw.horb.DecafParser.BinaryOperationContext ctx){
+    public static Binary generateBinary(DecafParser.BinaryOperationContext ctx){
         ExpressionGenerator eGen = new ExpressionGenerator();
         return new Binary(eGen.visit(ctx.expr().get(0)) // left side
                 , generateOperator(ctx.binaryOp()) //operator
                 , eGen.visit(ctx.expr().get(1))); //right side
     }
-    public static Location generateLocation(de.dhbw.horb.DecafParser.LocContext loc) {
+    public static Location generateLocation(DecafParser.LocContext loc) {
         return new Location(loc.id().getText());
     }
 }
diff --git a/src/main/java/de/dhbw/horb/StatementGenerator.java b/src/main/java/de/dhbw/horb/StatementGenerator.java
index 77efb6b..a7d534a 100644
--- a/src/main/java/de/dhbw/horb/StatementGenerator.java
+++ b/src/main/java/de/dhbw/horb/StatementGenerator.java
@@ -3,42 +3,81 @@ package de.dhbw.horb;
 import de.dhbw.horb.ast.*;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
+import static de.dhbw.horb.ASTGenerator.generateVariable;
+
 public class StatementGenerator extends DecafBaseVisitor<Statement> {
     @Override
     public Statement visitAssign(DecafParser.AssignContext ctx) {
-        throw new RuntimeException("TODO");
+        ExpressionGenerator eGen = new ExpressionGenerator();
+        return new Assignment(ExpressionGenerator.generateLocation(ctx.loc()), ctx.expr().accept(eGen));
     }
 
+
+    @Override
+    public Statement visitFunctionCall(DecafParser.FunctionCallContext ctx) {
+        ExpressionGenerator eGen = new ExpressionGenerator();
+        return new FunctionCall(ctx.funcCall().id().getText(), eGen.generateArgs(ctx.funcCall().args()));
+    }
+
+
     @Override
     public Statement visitIf(DecafParser.IfContext ctx) {
-        throw new RuntimeException("TODO");
+        ExpressionGenerator eGen = new ExpressionGenerator();
+        if (ctx.block().size() == 2){
+            return new IfElse(ctx.expr().accept(eGen), generateBlock(ctx.block(0)), generateBlock(ctx.block(1)));
+        }
+        if (ctx.block().size() == 1){
+            return new IfElse(ctx.expr().accept(eGen), generateBlock(ctx.block(0)),
+                    new Block(Collections.emptyList(), Collections.emptyList()));
+        }
+        throw new RuntimeException();
     }
 
     @Override
     public Statement visitWhile(DecafParser.WhileContext ctx) {
-        throw new RuntimeException("TODO");
+        ExpressionGenerator eGen = new ExpressionGenerator();
+        return new While(ctx.expr().accept(eGen), generateBlock(ctx.block()));
     }
 
     @Override
     public Statement visitReturn(DecafParser.ReturnContext ctx) {
-        throw new RuntimeException("TODO");
+        ExpressionGenerator eGen = new ExpressionGenerator();
+        return new Return(ctx.expr().accept(eGen));
     }
 
     @Override
     public Statement visitReturnVoid(DecafParser.ReturnVoidContext ctx) {
-        throw new RuntimeException("TODO");
+        return new ReturnVoid();
     }
 
     @Override
     public Statement visitBreak(DecafParser.BreakContext ctx) {
-        throw new RuntimeException("TODO");
+        return new Break();
     }
 
     @Override
     public Statement visitContinue(DecafParser.ContinueContext ctx) {
-        throw new RuntimeException("TODO");
+        return new Continue();
     }
 
+
+    public Block generateBlock(DecafParser.BlockContext block) {
+        List<Variable> variableList = new ArrayList<>();
+        List<Statement> statementList = new ArrayList<>();
+        for (DecafParser.VarContext varContext : block.var()) {
+            variableList.add(generateVariable(varContext));
+        }
+        for (DecafParser.StmtContext stmtContext : block.stmt()) {
+            statementList.add(generateStatement(stmtContext));
+        }
+
+        return new Block(variableList, statementList);
+    }
+
+    private Statement generateStatement(DecafParser.StmtContext stmtContext) {
+        return stmtContext.accept(this);
+    }
 }
diff --git a/src/main/java/de/dhbw/horb/ast/Decaf.interp b/src/main/java/de/dhbw/horb/ast/Decaf.interp
new file mode 100644
index 0000000..fdd9c32
--- /dev/null
+++ b/src/main/java/de/dhbw/horb/ast/Decaf.interp
@@ -0,0 +1,78 @@
+token literal names:
+null
+';'
+'def'
+'('
+')'
+','
+'{'
+'}'
+'='
+'if'
+'else'
+'while'
+'return'
+'break'
+'continue'
+'true'
+'false'
+'-'
+'+'
+'*'
+'int'
+'bool'
+'void'
+null
+null
+null
+
+token symbolic names:
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+SUB
+ADD
+MUL
+INT
+BOOL
+VOID
+IDENTIFIER
+Number
+WS
+
+rule names:
+program
+var
+type
+func
+params
+param
+block
+stmt
+expr
+binaryOp
+loc
+funcCall
+args
+literal
+boolean
+number
+id
+
+
+atn:
+[4, 1, 25, 167, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15, 2, 16, 7, 16, 1, 0, 1, 0, 5, 0, 37, 8, 0, 10, 0, 12, 0, 40, 9, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 3, 3, 53, 8, 3, 1, 3, 1, 3, 1, 3, 1, 4, 1, 4, 1, 4, 5, 4, 61, 8, 4, 10, 4, 12, 4, 64, 9, 4, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6, 5, 6, 71, 8, 6, 10, 6, 12, 6, 74, 9, 6, 1, 6, 5, 6, 77, 8, 6, 10, 6, 12, 6, 80, 9, 6, 1, 6, 1, 6, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 3, 7, 99, 8, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 3, 7, 117, 8, 7, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 3, 8, 127, 8, 8, 1, 8, 1, 8, 1, 8, 1, 8, 5, 8, 133, 8, 8, 10, 8, 12, 8, 136, 9, 8, 1, 9, 1, 9, 1, 10, 1, 10, 1, 11, 1, 11, 1, 11, 3, 11, 145, 8, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 12, 5, 12, 152, 8, 12, 10, 12, 12, 12, 155, 9, 12, 1, 13, 1, 13, 3, 13, 159, 8, 13, 1, 14, 1, 14, 1, 15, 1, 15, 1, 16, 1, 16, 1, 16, 0, 1, 16, 17, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 0, 3, 1, 0, 20, 22, 1, 0, 17, 19, 1, 0, 15, 16, 170, 0, 38, 1, 0, 0, 0, 2, 41, 1, 0, 0, 0, 4, 45, 1, 0, 0, 0, 6, 47, 1, 0, 0, 0, 8, 57, 1, 0, 0, 0, 10, 65, 1, 0, 0, 0, 12, 68, 1, 0, 0, 0, 14, 116, 1, 0, 0, 0, 16, 126, 1, 0, 0, 0, 18, 137, 1, 0, 0, 0, 20, 139, 1, 0, 0, 0, 22, 141, 1, 0, 0, 0, 24, 148, 1, 0, 0, 0, 26, 158, 1, 0, 0, 0, 28, 160, 1, 0, 0, 0, 30, 162, 1, 0, 0, 0, 32, 164, 1, 0, 0, 0, 34, 37, 3, 2, 1, 0, 35, 37, 3, 6, 3, 0, 36, 34, 1, 0, 0, 0, 36, 35, 1, 0, 0, 0, 37, 40, 1, 0, 0, 0, 38, 36, 1, 0, 0, 0, 38, 39, 1, 0, 0, 0, 39, 1, 1, 0, 0, 0, 40, 38, 1, 0, 0, 0, 41, 42, 3, 4, 2, 0, 42, 43, 3, 32, 16, 0, 43, 44, 5, 1, 0, 0, 44, 3, 1, 0, 0, 0, 45, 46, 7, 0, 0, 0, 46, 5, 1, 0, 0, 0, 47, 48, 5, 2, 0, 0, 48, 49, 3, 4, 2, 0, 49, 50, 3, 32, 16, 0, 50, 52, 5, 3, 0, 0, 51, 53, 3, 8, 4, 0, 52, 51, 1, 0, 0, 0, 52, 53, 1, 0, 0, 0, 53, 54, 1, 0, 0, 0, 54, 55, 5, 4, 0, 0, 55, 56, 3, 12, 6, 0, 56, 7, 1, 0, 0, 0, 57, 62, 3, 10, 5, 0, 58, 59, 5, 5, 0, 0, 59, 61, 3, 10, 5, 0, 60, 58, 1, 0, 0, 0, 61, 64, 1, 0, 0, 0, 62, 60, 1, 0, 0, 0, 62, 63, 1, 0, 0, 0, 63, 9, 1, 0, 0, 0, 64, 62, 1, 0, 0, 0, 65, 66, 3, 4, 2, 0, 66, 67, 3, 32, 16, 0, 67, 11, 1, 0, 0, 0, 68, 72, 5, 6, 0, 0, 69, 71, 3, 2, 1, 0, 70, 69, 1, 0, 0, 0, 71, 74, 1, 0, 0, 0, 72, 70, 1, 0, 0, 0, 72, 73, 1, 0, 0, 0, 73, 78, 1, 0, 0, 0, 74, 72, 1, 0, 0, 0, 75, 77, 3, 14, 7, 0, 76, 75, 1, 0, 0, 0, 77, 80, 1, 0, 0, 0, 78, 76, 1, 0, 0, 0, 78, 79, 1, 0, 0, 0, 79, 81, 1, 0, 0, 0, 80, 78, 1, 0, 0, 0, 81, 82, 5, 7, 0, 0, 82, 13, 1, 0, 0, 0, 83, 84, 3, 20, 10, 0, 84, 85, 5, 8, 0, 0, 85, 86, 3, 16, 8, 0, 86, 87, 5, 1, 0, 0, 87, 117, 1, 0, 0, 0, 88, 89, 3, 22, 11, 0, 89, 90, 5, 1, 0, 0, 90, 117, 1, 0, 0, 0, 91, 92, 5, 9, 0, 0, 92, 93, 5, 3, 0, 0, 93, 94, 3, 16, 8, 0, 94, 95, 5, 4, 0, 0, 95, 98, 3, 12, 6, 0, 96, 97, 5, 10, 0, 0, 97, 99, 3, 12, 6, 0, 98, 96, 1, 0, 0, 0, 98, 99, 1, 0, 0, 0, 99, 117, 1, 0, 0, 0, 100, 101, 5, 11, 0, 0, 101, 102, 5, 3, 0, 0, 102, 103, 3, 16, 8, 0, 103, 104, 5, 4, 0, 0, 104, 105, 3, 12, 6, 0, 105, 117, 1, 0, 0, 0, 106, 107, 5, 12, 0, 0, 107, 108, 3, 16, 8, 0, 108, 109, 5, 1, 0, 0, 109, 117, 1, 0, 0, 0, 110, 111, 5, 12, 0, 0, 111, 117, 5, 1, 0, 0, 112, 113, 5, 13, 0, 0, 113, 117, 5, 1, 0, 0, 114, 115, 5, 14, 0, 0, 115, 117, 5, 1, 0, 0, 116, 83, 1, 0, 0, 0, 116, 88, 1, 0, 0, 0, 116, 91, 1, 0, 0, 0, 116, 100, 1, 0, 0, 0, 116, 106, 1, 0, 0, 0, 116, 110, 1, 0, 0, 0, 116, 112, 1, 0, 0, 0, 116, 114, 1, 0, 0, 0, 117, 15, 1, 0, 0, 0, 118, 119, 6, 8, -1, 0, 119, 127, 3, 26, 13, 0, 120, 121, 5, 3, 0, 0, 121, 122, 3, 16, 8, 0, 122, 123, 5, 4, 0, 0, 123, 127, 1, 0, 0, 0, 124, 127, 3, 22, 11, 0, 125, 127, 3, 20, 10, 0, 126, 118, 1, 0, 0, 0, 126, 120, 1, 0, 0, 0, 126, 124, 1, 0, 0, 0, 126, 125, 1, 0, 0, 0, 127, 134, 1, 0, 0, 0, 128, 129, 10, 5, 0, 0, 129, 130, 3, 18, 9, 0, 130, 131, 3, 16, 8, 6, 131, 133, 1, 0, 0, 0, 132, 128, 1, 0, 0, 0, 133, 136, 1, 0, 0, 0, 134, 132, 1, 0, 0, 0, 134, 135, 1, 0, 0, 0, 135, 17, 1, 0, 0, 0, 136, 134, 1, 0, 0, 0, 137, 138, 7, 1, 0, 0, 138, 19, 1, 0, 0, 0, 139, 140, 3, 32, 16, 0, 140, 21, 1, 0, 0, 0, 141, 142, 3, 32, 16, 0, 142, 144, 5, 3, 0, 0, 143, 145, 3, 24, 12, 0, 144, 143, 1, 0, 0, 0, 144, 145, 1, 0, 0, 0, 145, 146, 1, 0, 0, 0, 146, 147, 5, 4, 0, 0, 147, 23, 1, 0, 0, 0, 148, 153, 3, 16, 8, 0, 149, 150, 5, 5, 0, 0, 150, 152, 3, 16, 8, 0, 151, 149, 1, 0, 0, 0, 152, 155, 1, 0, 0, 0, 153, 151, 1, 0, 0, 0, 153, 154, 1, 0, 0, 0, 154, 25, 1, 0, 0, 0, 155, 153, 1, 0, 0, 0, 156, 159, 3, 30, 15, 0, 157, 159, 3, 28, 14, 0, 158, 156, 1, 0, 0, 0, 158, 157, 1, 0, 0, 0, 159, 27, 1, 0, 0, 0, 160, 161, 7, 2, 0, 0, 161, 29, 1, 0, 0, 0, 162, 163, 5, 24, 0, 0, 163, 31, 1, 0, 0, 0, 164, 165, 5, 23, 0, 0, 165, 33, 1, 0, 0, 0, 13, 36, 38, 52, 62, 72, 78, 98, 116, 126, 134, 144, 153, 158]
\ No newline at end of file
diff --git a/src/main/java/de/dhbw/horb/ast/Decaf.tokens b/src/main/java/de/dhbw/horb/ast/Decaf.tokens
new file mode 100644
index 0000000..bb87b00
--- /dev/null
+++ b/src/main/java/de/dhbw/horb/ast/Decaf.tokens
@@ -0,0 +1,47 @@
+T__0=1
+T__1=2
+T__2=3
+T__3=4
+T__4=5
+T__5=6
+T__6=7
+T__7=8
+T__8=9
+T__9=10
+T__10=11
+T__11=12
+T__12=13
+T__13=14
+T__14=15
+T__15=16
+SUB=17
+ADD=18
+MUL=19
+INT=20
+BOOL=21
+VOID=22
+IDENTIFIER=23
+Number=24
+WS=25
+';'=1
+'def'=2
+'('=3
+')'=4
+','=5
+'{'=6
+'}'=7
+'='=8
+'if'=9
+'else'=10
+'while'=11
+'return'=12
+'break'=13
+'continue'=14
+'true'=15
+'false'=16
+'-'=17
+'+'=18
+'*'=19
+'int'=20
+'bool'=21
+'void'=22
diff --git a/src/main/java/de/dhbw/horb/ast/DecafBaseListener.java b/src/main/java/de/dhbw/horb/ast/DecafBaseListener.java
new file mode 100644
index 0000000..4790fc4
--- /dev/null
+++ b/src/main/java/de/dhbw/horb/ast/DecafBaseListener.java
@@ -0,0 +1,376 @@
+// Generated from C:/Users/laure/Documents/Dev/Compilerbau/LearningANTLR/UeBung2/AntlrAssignment3/src/main/antlr4/de/dhbw/horb/Decaf.g4 by ANTLR 4.13.1
+package de.dhbw.horb.ast;
+
+import org.antlr.v4.runtime.ParserRuleContext;
+import org.antlr.v4.runtime.tree.ErrorNode;
+import org.antlr.v4.runtime.tree.TerminalNode;
+
+/**
+ * This class provides an empty implementation of {@link DecafListener},
+ * which can be extended to create a listener which only needs to handle a subset
+ * of the available methods.
+ */
+@SuppressWarnings("CheckReturnValue")
+public class DecafBaseListener implements DecafListener {
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterProgram(DecafParser.ProgramContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitProgram(DecafParser.ProgramContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterVar(DecafParser.VarContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitVar(DecafParser.VarContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterType(DecafParser.TypeContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitType(DecafParser.TypeContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterFunc(DecafParser.FuncContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitFunc(DecafParser.FuncContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterParams(DecafParser.ParamsContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitParams(DecafParser.ParamsContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterParam(DecafParser.ParamContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitParam(DecafParser.ParamContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterBlock(DecafParser.BlockContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitBlock(DecafParser.BlockContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterAssign(DecafParser.AssignContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitAssign(DecafParser.AssignContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterFunctionCall(DecafParser.FunctionCallContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitFunctionCall(DecafParser.FunctionCallContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterIf(DecafParser.IfContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitIf(DecafParser.IfContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterWhile(DecafParser.WhileContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitWhile(DecafParser.WhileContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterReturn(DecafParser.ReturnContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitReturn(DecafParser.ReturnContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterReturnVoid(DecafParser.ReturnVoidContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitReturnVoid(DecafParser.ReturnVoidContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterBreak(DecafParser.BreakContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitBreak(DecafParser.BreakContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterContinue(DecafParser.ContinueContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitContinue(DecafParser.ContinueContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterExpression(DecafParser.ExpressionContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitExpression(DecafParser.ExpressionContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterFunCallExpression(DecafParser.FunCallExpressionContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitFunCallExpression(DecafParser.FunCallExpressionContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterConstant(DecafParser.ConstantContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitConstant(DecafParser.ConstantContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterBinaryOperation(DecafParser.BinaryOperationContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitBinaryOperation(DecafParser.BinaryOperationContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterLocation(DecafParser.LocationContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitLocation(DecafParser.LocationContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterBinaryOp(DecafParser.BinaryOpContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitBinaryOp(DecafParser.BinaryOpContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterLoc(DecafParser.LocContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitLoc(DecafParser.LocContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterFuncCall(DecafParser.FuncCallContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitFuncCall(DecafParser.FuncCallContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterArgs(DecafParser.ArgsContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitArgs(DecafParser.ArgsContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterLiteral(DecafParser.LiteralContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitLiteral(DecafParser.LiteralContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterBoolean(DecafParser.BooleanContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitBoolean(DecafParser.BooleanContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterNumber(DecafParser.NumberContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitNumber(DecafParser.NumberContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterId(DecafParser.IdContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitId(DecafParser.IdContext ctx) { }
+
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterEveryRule(ParserRuleContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitEveryRule(ParserRuleContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void visitTerminal(TerminalNode node) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void visitErrorNode(ErrorNode node) { }
+}
\ No newline at end of file
diff --git a/src/main/java/de/dhbw/horb/ast/DecafBaseVisitor.java b/src/main/java/de/dhbw/horb/ast/DecafBaseVisitor.java
new file mode 100644
index 0000000..f806493
--- /dev/null
+++ b/src/main/java/de/dhbw/horb/ast/DecafBaseVisitor.java
@@ -0,0 +1,211 @@
+// Generated from C:/Users/laure/Documents/Dev/Compilerbau/LearningANTLR/UeBung2/AntlrAssignment3/src/main/antlr4/de/dhbw/horb/Decaf.g4 by ANTLR 4.13.1
+package de.dhbw.horb.ast;
+import org.antlr.v4.runtime.tree.AbstractParseTreeVisitor;
+
+/**
+ * This class provides an empty implementation of {@link DecafVisitor},
+ * which can be extended to create a visitor which only needs to handle a subset
+ * of the available methods.
+ *
+ * @param <T> The return type of the visit operation. Use {@link Void} for
+ * operations with no return type.
+ */
+@SuppressWarnings("CheckReturnValue")
+public class DecafBaseVisitor<T> extends AbstractParseTreeVisitor<T> implements DecafVisitor<T> {
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitProgram(DecafParser.ProgramContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitVar(DecafParser.VarContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitType(DecafParser.TypeContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitFunc(DecafParser.FuncContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitParams(DecafParser.ParamsContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitParam(DecafParser.ParamContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitBlock(DecafParser.BlockContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitAssign(DecafParser.AssignContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitFunctionCall(DecafParser.FunctionCallContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitIf(DecafParser.IfContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitWhile(DecafParser.WhileContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitReturn(DecafParser.ReturnContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitReturnVoid(DecafParser.ReturnVoidContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitBreak(DecafParser.BreakContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitContinue(DecafParser.ContinueContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitExpression(DecafParser.ExpressionContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitFunCallExpression(DecafParser.FunCallExpressionContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitConstant(DecafParser.ConstantContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitBinaryOperation(DecafParser.BinaryOperationContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitLocation(DecafParser.LocationContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitBinaryOp(DecafParser.BinaryOpContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitLoc(DecafParser.LocContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitFuncCall(DecafParser.FuncCallContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitArgs(DecafParser.ArgsContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitLiteral(DecafParser.LiteralContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitBoolean(DecafParser.BooleanContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitNumber(DecafParser.NumberContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitId(DecafParser.IdContext ctx) { return visitChildren(ctx); }
+}
\ No newline at end of file
diff --git a/src/main/java/de/dhbw/horb/ast/DecafLexer.interp b/src/main/java/de/dhbw/horb/ast/DecafLexer.interp
new file mode 100644
index 0000000..22f63d0
--- /dev/null
+++ b/src/main/java/de/dhbw/horb/ast/DecafLexer.interp
@@ -0,0 +1,92 @@
+token literal names:
+null
+';'
+'def'
+'('
+')'
+','
+'{'
+'}'
+'='
+'if'
+'else'
+'while'
+'return'
+'break'
+'continue'
+'true'
+'false'
+'-'
+'+'
+'*'
+'int'
+'bool'
+'void'
+null
+null
+null
+
+token symbolic names:
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+SUB
+ADD
+MUL
+INT
+BOOL
+VOID
+IDENTIFIER
+Number
+WS
+
+rule names:
+T__0
+T__1
+T__2
+T__3
+T__4
+T__5
+T__6
+T__7
+T__8
+T__9
+T__10
+T__11
+T__12
+T__13
+T__14
+T__15
+SUB
+ADD
+MUL
+INT
+BOOL
+VOID
+IDENTIFIER
+Number
+WS
+
+channel names:
+DEFAULT_TOKEN_CHANNEL
+HIDDEN
+
+mode names:
+DEFAULT_MODE
+
+atn:
+[4, 0, 25, 150, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 2, 20, 7, 20, 2, 21, 7, 21, 2, 22, 7, 22, 2, 23, 7, 23, 2, 24, 7, 24, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 3, 1, 3, 1, 4, 1, 4, 1, 5, 1, 5, 1, 6, 1, 6, 1, 7, 1, 7, 1, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16, 1, 17, 1, 17, 1, 18, 1, 18, 1, 19, 1, 19, 1, 19, 1, 19, 1, 20, 1, 20, 1, 20, 1, 20, 1, 20, 1, 21, 1, 21, 1, 21, 1, 21, 1, 21, 1, 22, 4, 22, 138, 8, 22, 11, 22, 12, 22, 139, 1, 23, 4, 23, 143, 8, 23, 11, 23, 12, 23, 144, 1, 24, 1, 24, 1, 24, 1, 24, 0, 0, 25, 1, 1, 3, 2, 5, 3, 7, 4, 9, 5, 11, 6, 13, 7, 15, 8, 17, 9, 19, 10, 21, 11, 23, 12, 25, 13, 27, 14, 29, 15, 31, 16, 33, 17, 35, 18, 37, 19, 39, 20, 41, 21, 43, 22, 45, 23, 47, 24, 49, 25, 1, 0, 3, 2, 0, 65, 90, 97, 122, 1, 0, 48, 57, 3, 0, 9, 10, 13, 13, 32, 32, 151, 0, 1, 1, 0, 0, 0, 0, 3, 1, 0, 0, 0, 0, 5, 1, 0, 0, 0, 0, 7, 1, 0, 0, 0, 0, 9, 1, 0, 0, 0, 0, 11, 1, 0, 0, 0, 0, 13, 1, 0, 0, 0, 0, 15, 1, 0, 0, 0, 0, 17, 1, 0, 0, 0, 0, 19, 1, 0, 0, 0, 0, 21, 1, 0, 0, 0, 0, 23, 1, 0, 0, 0, 0, 25, 1, 0, 0, 0, 0, 27, 1, 0, 0, 0, 0, 29, 1, 0, 0, 0, 0, 31, 1, 0, 0, 0, 0, 33, 1, 0, 0, 0, 0, 35, 1, 0, 0, 0, 0, 37, 1, 0, 0, 0, 0, 39, 1, 0, 0, 0, 0, 41, 1, 0, 0, 0, 0, 43, 1, 0, 0, 0, 0, 45, 1, 0, 0, 0, 0, 47, 1, 0, 0, 0, 0, 49, 1, 0, 0, 0, 1, 51, 1, 0, 0, 0, 3, 53, 1, 0, 0, 0, 5, 57, 1, 0, 0, 0, 7, 59, 1, 0, 0, 0, 9, 61, 1, 0, 0, 0, 11, 63, 1, 0, 0, 0, 13, 65, 1, 0, 0, 0, 15, 67, 1, 0, 0, 0, 17, 69, 1, 0, 0, 0, 19, 72, 1, 0, 0, 0, 21, 77, 1, 0, 0, 0, 23, 83, 1, 0, 0, 0, 25, 90, 1, 0, 0, 0, 27, 96, 1, 0, 0, 0, 29, 105, 1, 0, 0, 0, 31, 110, 1, 0, 0, 0, 33, 116, 1, 0, 0, 0, 35, 118, 1, 0, 0, 0, 37, 120, 1, 0, 0, 0, 39, 122, 1, 0, 0, 0, 41, 126, 1, 0, 0, 0, 43, 131, 1, 0, 0, 0, 45, 137, 1, 0, 0, 0, 47, 142, 1, 0, 0, 0, 49, 146, 1, 0, 0, 0, 51, 52, 5, 59, 0, 0, 52, 2, 1, 0, 0, 0, 53, 54, 5, 100, 0, 0, 54, 55, 5, 101, 0, 0, 55, 56, 5, 102, 0, 0, 56, 4, 1, 0, 0, 0, 57, 58, 5, 40, 0, 0, 58, 6, 1, 0, 0, 0, 59, 60, 5, 41, 0, 0, 60, 8, 1, 0, 0, 0, 61, 62, 5, 44, 0, 0, 62, 10, 1, 0, 0, 0, 63, 64, 5, 123, 0, 0, 64, 12, 1, 0, 0, 0, 65, 66, 5, 125, 0, 0, 66, 14, 1, 0, 0, 0, 67, 68, 5, 61, 0, 0, 68, 16, 1, 0, 0, 0, 69, 70, 5, 105, 0, 0, 70, 71, 5, 102, 0, 0, 71, 18, 1, 0, 0, 0, 72, 73, 5, 101, 0, 0, 73, 74, 5, 108, 0, 0, 74, 75, 5, 115, 0, 0, 75, 76, 5, 101, 0, 0, 76, 20, 1, 0, 0, 0, 77, 78, 5, 119, 0, 0, 78, 79, 5, 104, 0, 0, 79, 80, 5, 105, 0, 0, 80, 81, 5, 108, 0, 0, 81, 82, 5, 101, 0, 0, 82, 22, 1, 0, 0, 0, 83, 84, 5, 114, 0, 0, 84, 85, 5, 101, 0, 0, 85, 86, 5, 116, 0, 0, 86, 87, 5, 117, 0, 0, 87, 88, 5, 114, 0, 0, 88, 89, 5, 110, 0, 0, 89, 24, 1, 0, 0, 0, 90, 91, 5, 98, 0, 0, 91, 92, 5, 114, 0, 0, 92, 93, 5, 101, 0, 0, 93, 94, 5, 97, 0, 0, 94, 95, 5, 107, 0, 0, 95, 26, 1, 0, 0, 0, 96, 97, 5, 99, 0, 0, 97, 98, 5, 111, 0, 0, 98, 99, 5, 110, 0, 0, 99, 100, 5, 116, 0, 0, 100, 101, 5, 105, 0, 0, 101, 102, 5, 110, 0, 0, 102, 103, 5, 117, 0, 0, 103, 104, 5, 101, 0, 0, 104, 28, 1, 0, 0, 0, 105, 106, 5, 116, 0, 0, 106, 107, 5, 114, 0, 0, 107, 108, 5, 117, 0, 0, 108, 109, 5, 101, 0, 0, 109, 30, 1, 0, 0, 0, 110, 111, 5, 102, 0, 0, 111, 112, 5, 97, 0, 0, 112, 113, 5, 108, 0, 0, 113, 114, 5, 115, 0, 0, 114, 115, 5, 101, 0, 0, 115, 32, 1, 0, 0, 0, 116, 117, 5, 45, 0, 0, 117, 34, 1, 0, 0, 0, 118, 119, 5, 43, 0, 0, 119, 36, 1, 0, 0, 0, 120, 121, 5, 42, 0, 0, 121, 38, 1, 0, 0, 0, 122, 123, 5, 105, 0, 0, 123, 124, 5, 110, 0, 0, 124, 125, 5, 116, 0, 0, 125, 40, 1, 0, 0, 0, 126, 127, 5, 98, 0, 0, 127, 128, 5, 111, 0, 0, 128, 129, 5, 111, 0, 0, 129, 130, 5, 108, 0, 0, 130, 42, 1, 0, 0, 0, 131, 132, 5, 118, 0, 0, 132, 133, 5, 111, 0, 0, 133, 134, 5, 105, 0, 0, 134, 135, 5, 100, 0, 0, 135, 44, 1, 0, 0, 0, 136, 138, 7, 0, 0, 0, 137, 136, 1, 0, 0, 0, 138, 139, 1, 0, 0, 0, 139, 137, 1, 0, 0, 0, 139, 140, 1, 0, 0, 0, 140, 46, 1, 0, 0, 0, 141, 143, 7, 1, 0, 0, 142, 141, 1, 0, 0, 0, 143, 144, 1, 0, 0, 0, 144, 142, 1, 0, 0, 0, 144, 145, 1, 0, 0, 0, 145, 48, 1, 0, 0, 0, 146, 147, 7, 2, 0, 0, 147, 148, 1, 0, 0, 0, 148, 149, 6, 24, 0, 0, 149, 50, 1, 0, 0, 0, 3, 0, 139, 144, 1, 6, 0, 0]
\ No newline at end of file
diff --git a/src/main/java/de/dhbw/horb/ast/DecafLexer.java b/src/main/java/de/dhbw/horb/ast/DecafLexer.java
new file mode 100644
index 0000000..3632db5
--- /dev/null
+++ b/src/main/java/de/dhbw/horb/ast/DecafLexer.java
@@ -0,0 +1,210 @@
+// Generated from C:/Users/laure/Documents/Dev/Compilerbau/LearningANTLR/UeBung2/AntlrAssignment3/src/main/antlr4/de/dhbw/horb/Decaf.g4 by ANTLR 4.13.1
+package de.dhbw.horb.ast;
+import org.antlr.v4.runtime.Lexer;
+import org.antlr.v4.runtime.CharStream;
+import org.antlr.v4.runtime.Token;
+import org.antlr.v4.runtime.TokenStream;
+import org.antlr.v4.runtime.*;
+import org.antlr.v4.runtime.atn.*;
+import org.antlr.v4.runtime.dfa.DFA;
+import org.antlr.v4.runtime.misc.*;
+
+@SuppressWarnings({"all", "warnings", "unchecked", "unused", "cast", "CheckReturnValue", "this-escape"})
+public class DecafLexer extends Lexer {
+	static { RuntimeMetaData.checkVersion("4.13.1", RuntimeMetaData.VERSION); }
+
+	protected static final DFA[] _decisionToDFA;
+	protected static final PredictionContextCache _sharedContextCache =
+		new PredictionContextCache();
+	public static final int
+		T__0=1, T__1=2, T__2=3, T__3=4, T__4=5, T__5=6, T__6=7, T__7=8, T__8=9, 
+		T__9=10, T__10=11, T__11=12, T__12=13, T__13=14, T__14=15, T__15=16, SUB=17, 
+		ADD=18, MUL=19, INT=20, BOOL=21, VOID=22, IDENTIFIER=23, Number=24, WS=25;
+	public static String[] channelNames = {
+		"DEFAULT_TOKEN_CHANNEL", "HIDDEN"
+	};
+
+	public static String[] modeNames = {
+		"DEFAULT_MODE"
+	};
+
+	private static String[] makeRuleNames() {
+		return new String[] {
+			"T__0", "T__1", "T__2", "T__3", "T__4", "T__5", "T__6", "T__7", "T__8", 
+			"T__9", "T__10", "T__11", "T__12", "T__13", "T__14", "T__15", "SUB", 
+			"ADD", "MUL", "INT", "BOOL", "VOID", "IDENTIFIER", "Number", "WS"
+		};
+	}
+	public static final String[] ruleNames = makeRuleNames();
+
+	private static String[] makeLiteralNames() {
+		return new String[] {
+			null, "';'", "'def'", "'('", "')'", "','", "'{'", "'}'", "'='", "'if'", 
+			"'else'", "'while'", "'return'", "'break'", "'continue'", "'true'", "'false'", 
+			"'-'", "'+'", "'*'", "'int'", "'bool'", "'void'"
+		};
+	}
+	private static final String[] _LITERAL_NAMES = makeLiteralNames();
+	private static String[] makeSymbolicNames() {
+		return new String[] {
+			null, null, null, null, null, null, null, null, null, null, null, null, 
+			null, null, null, null, null, "SUB", "ADD", "MUL", "INT", "BOOL", "VOID", 
+			"IDENTIFIER", "Number", "WS"
+		};
+	}
+	private static final String[] _SYMBOLIC_NAMES = makeSymbolicNames();
+	public static final Vocabulary VOCABULARY = new VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);
+
+	/**
+	 * @deprecated Use {@link #VOCABULARY} instead.
+	 */
+	@Deprecated
+	public static final String[] tokenNames;
+	static {
+		tokenNames = new String[_SYMBOLIC_NAMES.length];
+		for (int i = 0; i < tokenNames.length; i++) {
+			tokenNames[i] = VOCABULARY.getLiteralName(i);
+			if (tokenNames[i] == null) {
+				tokenNames[i] = VOCABULARY.getSymbolicName(i);
+			}
+
+			if (tokenNames[i] == null) {
+				tokenNames[i] = "<INVALID>";
+			}
+		}
+	}
+
+	@Override
+	@Deprecated
+	public String[] getTokenNames() {
+		return tokenNames;
+	}
+
+	@Override
+
+	public Vocabulary getVocabulary() {
+		return VOCABULARY;
+	}
+
+
+	public DecafLexer(CharStream input) {
+		super(input);
+		_interp = new LexerATNSimulator(this,_ATN,_decisionToDFA,_sharedContextCache);
+	}
+
+	@Override
+	public String getGrammarFileName() { return "Decaf.g4"; }
+
+	@Override
+	public String[] getRuleNames() { return ruleNames; }
+
+	@Override
+	public String getSerializedATN() { return _serializedATN; }
+
+	@Override
+	public String[] getChannelNames() { return channelNames; }
+
+	@Override
+	public String[] getModeNames() { return modeNames; }
+
+	@Override
+	public ATN getATN() { return _ATN; }
+
+	public static final String _serializedATN =
+		"\u0004\u0000\u0019\u0096\u0006\uffff\uffff\u0002\u0000\u0007\u0000\u0002"+
+		"\u0001\u0007\u0001\u0002\u0002\u0007\u0002\u0002\u0003\u0007\u0003\u0002"+
+		"\u0004\u0007\u0004\u0002\u0005\u0007\u0005\u0002\u0006\u0007\u0006\u0002"+
+		"\u0007\u0007\u0007\u0002\b\u0007\b\u0002\t\u0007\t\u0002\n\u0007\n\u0002"+
+		"\u000b\u0007\u000b\u0002\f\u0007\f\u0002\r\u0007\r\u0002\u000e\u0007\u000e"+
+		"\u0002\u000f\u0007\u000f\u0002\u0010\u0007\u0010\u0002\u0011\u0007\u0011"+
+		"\u0002\u0012\u0007\u0012\u0002\u0013\u0007\u0013\u0002\u0014\u0007\u0014"+
+		"\u0002\u0015\u0007\u0015\u0002\u0016\u0007\u0016\u0002\u0017\u0007\u0017"+
+		"\u0002\u0018\u0007\u0018\u0001\u0000\u0001\u0000\u0001\u0001\u0001\u0001"+
+		"\u0001\u0001\u0001\u0001\u0001\u0002\u0001\u0002\u0001\u0003\u0001\u0003"+
+		"\u0001\u0004\u0001\u0004\u0001\u0005\u0001\u0005\u0001\u0006\u0001\u0006"+
+		"\u0001\u0007\u0001\u0007\u0001\b\u0001\b\u0001\b\u0001\t\u0001\t\u0001"+
+		"\t\u0001\t\u0001\t\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001"+
+		"\u000b\u0001\u000b\u0001\u000b\u0001\u000b\u0001\u000b\u0001\u000b\u0001"+
+		"\u000b\u0001\f\u0001\f\u0001\f\u0001\f\u0001\f\u0001\f\u0001\r\u0001\r"+
+		"\u0001\r\u0001\r\u0001\r\u0001\r\u0001\r\u0001\r\u0001\r\u0001\u000e\u0001"+
+		"\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000f\u0001\u000f\u0001"+
+		"\u000f\u0001\u000f\u0001\u000f\u0001\u000f\u0001\u0010\u0001\u0010\u0001"+
+		"\u0011\u0001\u0011\u0001\u0012\u0001\u0012\u0001\u0013\u0001\u0013\u0001"+
+		"\u0013\u0001\u0013\u0001\u0014\u0001\u0014\u0001\u0014\u0001\u0014\u0001"+
+		"\u0014\u0001\u0015\u0001\u0015\u0001\u0015\u0001\u0015\u0001\u0015\u0001"+
+		"\u0016\u0004\u0016\u008a\b\u0016\u000b\u0016\f\u0016\u008b\u0001\u0017"+
+		"\u0004\u0017\u008f\b\u0017\u000b\u0017\f\u0017\u0090\u0001\u0018\u0001"+
+		"\u0018\u0001\u0018\u0001\u0018\u0000\u0000\u0019\u0001\u0001\u0003\u0002"+
+		"\u0005\u0003\u0007\u0004\t\u0005\u000b\u0006\r\u0007\u000f\b\u0011\t\u0013"+
+		"\n\u0015\u000b\u0017\f\u0019\r\u001b\u000e\u001d\u000f\u001f\u0010!\u0011"+
+		"#\u0012%\u0013\'\u0014)\u0015+\u0016-\u0017/\u00181\u0019\u0001\u0000"+
+		"\u0003\u0002\u0000AZaz\u0001\u000009\u0003\u0000\t\n\r\r  \u0097\u0000"+
+		"\u0001\u0001\u0000\u0000\u0000\u0000\u0003\u0001\u0000\u0000\u0000\u0000"+
+		"\u0005\u0001\u0000\u0000\u0000\u0000\u0007\u0001\u0000\u0000\u0000\u0000"+
+		"\t\u0001\u0000\u0000\u0000\u0000\u000b\u0001\u0000\u0000\u0000\u0000\r"+
+		"\u0001\u0000\u0000\u0000\u0000\u000f\u0001\u0000\u0000\u0000\u0000\u0011"+
+		"\u0001\u0000\u0000\u0000\u0000\u0013\u0001\u0000\u0000\u0000\u0000\u0015"+
+		"\u0001\u0000\u0000\u0000\u0000\u0017\u0001\u0000\u0000\u0000\u0000\u0019"+
+		"\u0001\u0000\u0000\u0000\u0000\u001b\u0001\u0000\u0000\u0000\u0000\u001d"+
+		"\u0001\u0000\u0000\u0000\u0000\u001f\u0001\u0000\u0000\u0000\u0000!\u0001"+
+		"\u0000\u0000\u0000\u0000#\u0001\u0000\u0000\u0000\u0000%\u0001\u0000\u0000"+
+		"\u0000\u0000\'\u0001\u0000\u0000\u0000\u0000)\u0001\u0000\u0000\u0000"+
+		"\u0000+\u0001\u0000\u0000\u0000\u0000-\u0001\u0000\u0000\u0000\u0000/"+
+		"\u0001\u0000\u0000\u0000\u00001\u0001\u0000\u0000\u0000\u00013\u0001\u0000"+
+		"\u0000\u0000\u00035\u0001\u0000\u0000\u0000\u00059\u0001\u0000\u0000\u0000"+
+		"\u0007;\u0001\u0000\u0000\u0000\t=\u0001\u0000\u0000\u0000\u000b?\u0001"+
+		"\u0000\u0000\u0000\rA\u0001\u0000\u0000\u0000\u000fC\u0001\u0000\u0000"+
+		"\u0000\u0011E\u0001\u0000\u0000\u0000\u0013H\u0001\u0000\u0000\u0000\u0015"+
+		"M\u0001\u0000\u0000\u0000\u0017S\u0001\u0000\u0000\u0000\u0019Z\u0001"+
+		"\u0000\u0000\u0000\u001b`\u0001\u0000\u0000\u0000\u001di\u0001\u0000\u0000"+
+		"\u0000\u001fn\u0001\u0000\u0000\u0000!t\u0001\u0000\u0000\u0000#v\u0001"+
+		"\u0000\u0000\u0000%x\u0001\u0000\u0000\u0000\'z\u0001\u0000\u0000\u0000"+
+		")~\u0001\u0000\u0000\u0000+\u0083\u0001\u0000\u0000\u0000-\u0089\u0001"+
+		"\u0000\u0000\u0000/\u008e\u0001\u0000\u0000\u00001\u0092\u0001\u0000\u0000"+
+		"\u000034\u0005;\u0000\u00004\u0002\u0001\u0000\u0000\u000056\u0005d\u0000"+
+		"\u000067\u0005e\u0000\u000078\u0005f\u0000\u00008\u0004\u0001\u0000\u0000"+
+		"\u00009:\u0005(\u0000\u0000:\u0006\u0001\u0000\u0000\u0000;<\u0005)\u0000"+
+		"\u0000<\b\u0001\u0000\u0000\u0000=>\u0005,\u0000\u0000>\n\u0001\u0000"+
+		"\u0000\u0000?@\u0005{\u0000\u0000@\f\u0001\u0000\u0000\u0000AB\u0005}"+
+		"\u0000\u0000B\u000e\u0001\u0000\u0000\u0000CD\u0005=\u0000\u0000D\u0010"+
+		"\u0001\u0000\u0000\u0000EF\u0005i\u0000\u0000FG\u0005f\u0000\u0000G\u0012"+
+		"\u0001\u0000\u0000\u0000HI\u0005e\u0000\u0000IJ\u0005l\u0000\u0000JK\u0005"+
+		"s\u0000\u0000KL\u0005e\u0000\u0000L\u0014\u0001\u0000\u0000\u0000MN\u0005"+
+		"w\u0000\u0000NO\u0005h\u0000\u0000OP\u0005i\u0000\u0000PQ\u0005l\u0000"+
+		"\u0000QR\u0005e\u0000\u0000R\u0016\u0001\u0000\u0000\u0000ST\u0005r\u0000"+
+		"\u0000TU\u0005e\u0000\u0000UV\u0005t\u0000\u0000VW\u0005u\u0000\u0000"+
+		"WX\u0005r\u0000\u0000XY\u0005n\u0000\u0000Y\u0018\u0001\u0000\u0000\u0000"+
+		"Z[\u0005b\u0000\u0000[\\\u0005r\u0000\u0000\\]\u0005e\u0000\u0000]^\u0005"+
+		"a\u0000\u0000^_\u0005k\u0000\u0000_\u001a\u0001\u0000\u0000\u0000`a\u0005"+
+		"c\u0000\u0000ab\u0005o\u0000\u0000bc\u0005n\u0000\u0000cd\u0005t\u0000"+
+		"\u0000de\u0005i\u0000\u0000ef\u0005n\u0000\u0000fg\u0005u\u0000\u0000"+
+		"gh\u0005e\u0000\u0000h\u001c\u0001\u0000\u0000\u0000ij\u0005t\u0000\u0000"+
+		"jk\u0005r\u0000\u0000kl\u0005u\u0000\u0000lm\u0005e\u0000\u0000m\u001e"+
+		"\u0001\u0000\u0000\u0000no\u0005f\u0000\u0000op\u0005a\u0000\u0000pq\u0005"+
+		"l\u0000\u0000qr\u0005s\u0000\u0000rs\u0005e\u0000\u0000s \u0001\u0000"+
+		"\u0000\u0000tu\u0005-\u0000\u0000u\"\u0001\u0000\u0000\u0000vw\u0005+"+
+		"\u0000\u0000w$\u0001\u0000\u0000\u0000xy\u0005*\u0000\u0000y&\u0001\u0000"+
+		"\u0000\u0000z{\u0005i\u0000\u0000{|\u0005n\u0000\u0000|}\u0005t\u0000"+
+		"\u0000}(\u0001\u0000\u0000\u0000~\u007f\u0005b\u0000\u0000\u007f\u0080"+
+		"\u0005o\u0000\u0000\u0080\u0081\u0005o\u0000\u0000\u0081\u0082\u0005l"+
+		"\u0000\u0000\u0082*\u0001\u0000\u0000\u0000\u0083\u0084\u0005v\u0000\u0000"+
+		"\u0084\u0085\u0005o\u0000\u0000\u0085\u0086\u0005i\u0000\u0000\u0086\u0087"+
+		"\u0005d\u0000\u0000\u0087,\u0001\u0000\u0000\u0000\u0088\u008a\u0007\u0000"+
+		"\u0000\u0000\u0089\u0088\u0001\u0000\u0000\u0000\u008a\u008b\u0001\u0000"+
+		"\u0000\u0000\u008b\u0089\u0001\u0000\u0000\u0000\u008b\u008c\u0001\u0000"+
+		"\u0000\u0000\u008c.\u0001\u0000\u0000\u0000\u008d\u008f\u0007\u0001\u0000"+
+		"\u0000\u008e\u008d\u0001\u0000\u0000\u0000\u008f\u0090\u0001\u0000\u0000"+
+		"\u0000\u0090\u008e\u0001\u0000\u0000\u0000\u0090\u0091\u0001\u0000\u0000"+
+		"\u0000\u00910\u0001\u0000\u0000\u0000\u0092\u0093\u0007\u0002\u0000\u0000"+
+		"\u0093\u0094\u0001\u0000\u0000\u0000\u0094\u0095\u0006\u0018\u0000\u0000"+
+		"\u00952\u0001\u0000\u0000\u0000\u0003\u0000\u008b\u0090\u0001\u0006\u0000"+
+		"\u0000";
+	public static final ATN _ATN =
+		new ATNDeserializer().deserialize(_serializedATN.toCharArray());
+	static {
+		_decisionToDFA = new DFA[_ATN.getNumberOfDecisions()];
+		for (int i = 0; i < _ATN.getNumberOfDecisions(); i++) {
+			_decisionToDFA[i] = new DFA(_ATN.getDecisionState(i), i);
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/de/dhbw/horb/ast/DecafLexer.tokens b/src/main/java/de/dhbw/horb/ast/DecafLexer.tokens
new file mode 100644
index 0000000..bb87b00
--- /dev/null
+++ b/src/main/java/de/dhbw/horb/ast/DecafLexer.tokens
@@ -0,0 +1,47 @@
+T__0=1
+T__1=2
+T__2=3
+T__3=4
+T__4=5
+T__5=6
+T__6=7
+T__7=8
+T__8=9
+T__9=10
+T__10=11
+T__11=12
+T__12=13
+T__13=14
+T__14=15
+T__15=16
+SUB=17
+ADD=18
+MUL=19
+INT=20
+BOOL=21
+VOID=22
+IDENTIFIER=23
+Number=24
+WS=25
+';'=1
+'def'=2
+'('=3
+')'=4
+','=5
+'{'=6
+'}'=7
+'='=8
+'if'=9
+'else'=10
+'while'=11
+'return'=12
+'break'=13
+'continue'=14
+'true'=15
+'false'=16
+'-'=17
+'+'=18
+'*'=19
+'int'=20
+'bool'=21
+'void'=22
diff --git a/src/main/java/de/dhbw/horb/ast/DecafListener.java b/src/main/java/de/dhbw/horb/ast/DecafListener.java
new file mode 100644
index 0000000..791300b
--- /dev/null
+++ b/src/main/java/de/dhbw/horb/ast/DecafListener.java
@@ -0,0 +1,316 @@
+// Generated from C:/Users/laure/Documents/Dev/Compilerbau/LearningANTLR/UeBung2/AntlrAssignment3/src/main/antlr4/de/dhbw/horb/Decaf.g4 by ANTLR 4.13.1
+package de.dhbw.horb.ast;
+import org.antlr.v4.runtime.tree.ParseTreeListener;
+
+/**
+ * This interface defines a complete listener for a parse tree produced by
+ * {@link DecafParser}.
+ */
+public interface DecafListener extends ParseTreeListener {
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#program}.
+	 * @param ctx the parse tree
+	 */
+	void enterProgram(DecafParser.ProgramContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#program}.
+	 * @param ctx the parse tree
+	 */
+	void exitProgram(DecafParser.ProgramContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#var}.
+	 * @param ctx the parse tree
+	 */
+	void enterVar(DecafParser.VarContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#var}.
+	 * @param ctx the parse tree
+	 */
+	void exitVar(DecafParser.VarContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#type}.
+	 * @param ctx the parse tree
+	 */
+	void enterType(DecafParser.TypeContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#type}.
+	 * @param ctx the parse tree
+	 */
+	void exitType(DecafParser.TypeContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#func}.
+	 * @param ctx the parse tree
+	 */
+	void enterFunc(DecafParser.FuncContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#func}.
+	 * @param ctx the parse tree
+	 */
+	void exitFunc(DecafParser.FuncContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#params}.
+	 * @param ctx the parse tree
+	 */
+	void enterParams(DecafParser.ParamsContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#params}.
+	 * @param ctx the parse tree
+	 */
+	void exitParams(DecafParser.ParamsContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#param}.
+	 * @param ctx the parse tree
+	 */
+	void enterParam(DecafParser.ParamContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#param}.
+	 * @param ctx the parse tree
+	 */
+	void exitParam(DecafParser.ParamContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#block}.
+	 * @param ctx the parse tree
+	 */
+	void enterBlock(DecafParser.BlockContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#block}.
+	 * @param ctx the parse tree
+	 */
+	void exitBlock(DecafParser.BlockContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Assign}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterAssign(DecafParser.AssignContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Assign}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitAssign(DecafParser.AssignContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code FunctionCall}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterFunctionCall(DecafParser.FunctionCallContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code FunctionCall}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitFunctionCall(DecafParser.FunctionCallContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code If}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterIf(DecafParser.IfContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code If}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitIf(DecafParser.IfContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code While}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterWhile(DecafParser.WhileContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code While}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitWhile(DecafParser.WhileContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Return}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterReturn(DecafParser.ReturnContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Return}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitReturn(DecafParser.ReturnContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code ReturnVoid}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterReturnVoid(DecafParser.ReturnVoidContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code ReturnVoid}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitReturnVoid(DecafParser.ReturnVoidContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Break}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterBreak(DecafParser.BreakContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Break}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitBreak(DecafParser.BreakContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Continue}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterContinue(DecafParser.ContinueContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Continue}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitContinue(DecafParser.ContinueContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Expression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterExpression(DecafParser.ExpressionContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Expression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitExpression(DecafParser.ExpressionContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code FunCallExpression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterFunCallExpression(DecafParser.FunCallExpressionContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code FunCallExpression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitFunCallExpression(DecafParser.FunCallExpressionContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Constant}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterConstant(DecafParser.ConstantContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Constant}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitConstant(DecafParser.ConstantContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code BinaryOperation}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterBinaryOperation(DecafParser.BinaryOperationContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code BinaryOperation}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitBinaryOperation(DecafParser.BinaryOperationContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Location}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterLocation(DecafParser.LocationContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Location}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitLocation(DecafParser.LocationContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#binaryOp}.
+	 * @param ctx the parse tree
+	 */
+	void enterBinaryOp(DecafParser.BinaryOpContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#binaryOp}.
+	 * @param ctx the parse tree
+	 */
+	void exitBinaryOp(DecafParser.BinaryOpContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#loc}.
+	 * @param ctx the parse tree
+	 */
+	void enterLoc(DecafParser.LocContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#loc}.
+	 * @param ctx the parse tree
+	 */
+	void exitLoc(DecafParser.LocContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#funcCall}.
+	 * @param ctx the parse tree
+	 */
+	void enterFuncCall(DecafParser.FuncCallContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#funcCall}.
+	 * @param ctx the parse tree
+	 */
+	void exitFuncCall(DecafParser.FuncCallContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#args}.
+	 * @param ctx the parse tree
+	 */
+	void enterArgs(DecafParser.ArgsContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#args}.
+	 * @param ctx the parse tree
+	 */
+	void exitArgs(DecafParser.ArgsContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#literal}.
+	 * @param ctx the parse tree
+	 */
+	void enterLiteral(DecafParser.LiteralContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#literal}.
+	 * @param ctx the parse tree
+	 */
+	void exitLiteral(DecafParser.LiteralContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#boolean}.
+	 * @param ctx the parse tree
+	 */
+	void enterBoolean(DecafParser.BooleanContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#boolean}.
+	 * @param ctx the parse tree
+	 */
+	void exitBoolean(DecafParser.BooleanContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#number}.
+	 * @param ctx the parse tree
+	 */
+	void enterNumber(DecafParser.NumberContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#number}.
+	 * @param ctx the parse tree
+	 */
+	void exitNumber(DecafParser.NumberContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#id}.
+	 * @param ctx the parse tree
+	 */
+	void enterId(DecafParser.IdContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#id}.
+	 * @param ctx the parse tree
+	 */
+	void exitId(DecafParser.IdContext ctx);
+}
\ No newline at end of file
diff --git a/src/main/java/de/dhbw/horb/ast/DecafParser.java b/src/main/java/de/dhbw/horb/ast/DecafParser.java
new file mode 100644
index 0000000..45c969e
--- /dev/null
+++ b/src/main/java/de/dhbw/horb/ast/DecafParser.java
@@ -0,0 +1,1643 @@
+// Generated from C:/Users/laure/Documents/Dev/Compilerbau/LearningANTLR/UeBung2/AntlrAssignment3/src/main/antlr4/de/dhbw/horb/Decaf.g4 by ANTLR 4.13.1
+package de.dhbw.horb.ast;
+
+import org.antlr.v4.runtime.*;
+import org.antlr.v4.runtime.atn.ATN;
+import org.antlr.v4.runtime.atn.ATNDeserializer;
+import org.antlr.v4.runtime.atn.ParserATNSimulator;
+import org.antlr.v4.runtime.atn.PredictionContextCache;
+import org.antlr.v4.runtime.dfa.DFA;
+import org.antlr.v4.runtime.tree.ParseTreeListener;
+import org.antlr.v4.runtime.tree.ParseTreeVisitor;
+import org.antlr.v4.runtime.tree.TerminalNode;
+
+import java.util.List;
+
+@SuppressWarnings({"all", "warnings", "unchecked", "unused", "cast", "CheckReturnValue"})
+public class DecafParser extends Parser {
+	static { RuntimeMetaData.checkVersion("4.13.1", RuntimeMetaData.VERSION); }
+
+	protected static final DFA[] _decisionToDFA;
+	protected static final PredictionContextCache _sharedContextCache =
+		new PredictionContextCache();
+	public static final int
+		T__0=1, T__1=2, T__2=3, T__3=4, T__4=5, T__5=6, T__6=7, T__7=8, T__8=9, 
+		T__9=10, T__10=11, T__11=12, T__12=13, T__13=14, T__14=15, T__15=16, SUB=17, 
+		ADD=18, MUL=19, INT=20, BOOL=21, VOID=22, IDENTIFIER=23, Number=24, WS=25;
+	public static final int
+		RULE_program = 0, RULE_var = 1, RULE_type = 2, RULE_func = 3, RULE_params = 4, 
+		RULE_param = 5, RULE_block = 6, RULE_stmt = 7, RULE_expr = 8, RULE_binaryOp = 9, 
+		RULE_loc = 10, RULE_funcCall = 11, RULE_args = 12, RULE_literal = 13, 
+		RULE_boolean = 14, RULE_number = 15, RULE_id = 16;
+	private static String[] makeRuleNames() {
+		return new String[] {
+			"program", "var", "type", "func", "params", "param", "block", "stmt", 
+			"expr", "binaryOp", "loc", "funcCall", "args", "literal", "boolean", 
+			"number", "id"
+		};
+	}
+	public static final String[] ruleNames = makeRuleNames();
+
+	private static String[] makeLiteralNames() {
+		return new String[] {
+			null, "';'", "'def'", "'('", "')'", "','", "'{'", "'}'", "'='", "'if'", 
+			"'else'", "'while'", "'return'", "'break'", "'continue'", "'true'", "'false'", 
+			"'-'", "'+'", "'*'", "'int'", "'bool'", "'void'"
+		};
+	}
+	private static final String[] _LITERAL_NAMES = makeLiteralNames();
+	private static String[] makeSymbolicNames() {
+		return new String[] {
+			null, null, null, null, null, null, null, null, null, null, null, null, 
+			null, null, null, null, null, "SUB", "ADD", "MUL", "INT", "BOOL", "VOID", 
+			"IDENTIFIER", "Number", "WS"
+		};
+	}
+	private static final String[] _SYMBOLIC_NAMES = makeSymbolicNames();
+	public static final Vocabulary VOCABULARY = new VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);
+
+	/**
+	 * @deprecated Use {@link #VOCABULARY} instead.
+	 */
+	@Deprecated
+	public static final String[] tokenNames;
+	static {
+		tokenNames = new String[_SYMBOLIC_NAMES.length];
+		for (int i = 0; i < tokenNames.length; i++) {
+			tokenNames[i] = VOCABULARY.getLiteralName(i);
+			if (tokenNames[i] == null) {
+				tokenNames[i] = VOCABULARY.getSymbolicName(i);
+			}
+
+			if (tokenNames[i] == null) {
+				tokenNames[i] = "<INVALID>";
+			}
+		}
+	}
+
+	@Override
+	@Deprecated
+	public String[] getTokenNames() {
+		return tokenNames;
+	}
+
+	@Override
+
+	public Vocabulary getVocabulary() {
+		return VOCABULARY;
+	}
+
+	@Override
+	public String getGrammarFileName() { return "Decaf.g4"; }
+
+	@Override
+	public String[] getRuleNames() { return ruleNames; }
+
+	@Override
+	public String getSerializedATN() { return _serializedATN; }
+
+	@Override
+	public ATN getATN() { return _ATN; }
+
+	public DecafParser(TokenStream input) {
+		super(input);
+		_interp = new ParserATNSimulator(this,_ATN,_decisionToDFA,_sharedContextCache);
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class ProgramContext extends ParserRuleContext {
+		public List<VarContext> var() {
+			return getRuleContexts(VarContext.class);
+		}
+		public VarContext var(int i) {
+			return getRuleContext(VarContext.class,i);
+		}
+		public List<FuncContext> func() {
+			return getRuleContexts(FuncContext.class);
+		}
+		public FuncContext func(int i) {
+			return getRuleContext(FuncContext.class,i);
+		}
+		public ProgramContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_program; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterProgram(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitProgram(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitProgram(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ProgramContext program() throws RecognitionException {
+		ProgramContext _localctx = new ProgramContext(_ctx, getState());
+		enterRule(_localctx, 0, RULE_program);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(38);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while ((((_la) & ~0x3f) == 0 && ((1L << _la) & 7340036L) != 0)) {
+				{
+				setState(36);
+				_errHandler.sync(this);
+				switch (_input.LA(1)) {
+				case INT:
+				case BOOL:
+				case VOID:
+					{
+					setState(34);
+					var();
+					}
+					break;
+				case T__1:
+					{
+					setState(35);
+					func();
+					}
+					break;
+				default:
+					throw new NoViableAltException(this);
+				}
+				}
+				setState(40);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class VarContext extends ParserRuleContext {
+		public TypeContext type() {
+			return getRuleContext(TypeContext.class,0);
+		}
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public VarContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_var; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterVar(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitVar(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitVar(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final VarContext var() throws RecognitionException {
+		VarContext _localctx = new VarContext(_ctx, getState());
+		enterRule(_localctx, 2, RULE_var);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(41);
+			type();
+			setState(42);
+			id();
+			setState(43);
+			match(T__0);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class TypeContext extends ParserRuleContext {
+		public TerminalNode INT() { return getToken(DecafParser.INT, 0); }
+		public TerminalNode BOOL() { return getToken(DecafParser.BOOL, 0); }
+		public TerminalNode VOID() { return getToken(DecafParser.VOID, 0); }
+		public TypeContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_type; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterType(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitType(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitType(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final TypeContext type() throws RecognitionException {
+		TypeContext _localctx = new TypeContext(_ctx, getState());
+		enterRule(_localctx, 4, RULE_type);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(45);
+			_la = _input.LA(1);
+			if ( !((((_la) & ~0x3f) == 0 && ((1L << _la) & 7340032L) != 0)) ) {
+			_errHandler.recoverInline(this);
+			}
+			else {
+				if ( _input.LA(1)==Token.EOF ) matchedEOF = true;
+				_errHandler.reportMatch(this);
+				consume();
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class FuncContext extends ParserRuleContext {
+		public TypeContext type() {
+			return getRuleContext(TypeContext.class,0);
+		}
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public BlockContext block() {
+			return getRuleContext(BlockContext.class,0);
+		}
+		public ParamsContext params() {
+			return getRuleContext(ParamsContext.class,0);
+		}
+		public FuncContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_func; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterFunc(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitFunc(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitFunc(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final FuncContext func() throws RecognitionException {
+		FuncContext _localctx = new FuncContext(_ctx, getState());
+		enterRule(_localctx, 6, RULE_func);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(47);
+			match(T__1);
+			setState(48);
+			type();
+			setState(49);
+			id();
+			setState(50);
+			match(T__2);
+			setState(52);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			if ((((_la) & ~0x3f) == 0 && ((1L << _la) & 7340032L) != 0)) {
+				{
+				setState(51);
+				params();
+				}
+			}
+
+			setState(54);
+			match(T__3);
+			setState(55);
+			block();
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class ParamsContext extends ParserRuleContext {
+		public List<ParamContext> param() {
+			return getRuleContexts(ParamContext.class);
+		}
+		public ParamContext param(int i) {
+			return getRuleContext(ParamContext.class,i);
+		}
+		public ParamsContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_params; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterParams(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitParams(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitParams(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ParamsContext params() throws RecognitionException {
+		ParamsContext _localctx = new ParamsContext(_ctx, getState());
+		enterRule(_localctx, 8, RULE_params);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(57);
+			param();
+			setState(62);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while (_la==T__4) {
+				{
+				{
+				setState(58);
+				match(T__4);
+				setState(59);
+				param();
+				}
+				}
+				setState(64);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class ParamContext extends ParserRuleContext {
+		public TypeContext type() {
+			return getRuleContext(TypeContext.class,0);
+		}
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public ParamContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_param; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterParam(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitParam(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitParam(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ParamContext param() throws RecognitionException {
+		ParamContext _localctx = new ParamContext(_ctx, getState());
+		enterRule(_localctx, 10, RULE_param);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(65);
+			type();
+			setState(66);
+			id();
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class BlockContext extends ParserRuleContext {
+		public List<VarContext> var() {
+			return getRuleContexts(VarContext.class);
+		}
+		public VarContext var(int i) {
+			return getRuleContext(VarContext.class,i);
+		}
+		public List<StmtContext> stmt() {
+			return getRuleContexts(StmtContext.class);
+		}
+		public StmtContext stmt(int i) {
+			return getRuleContext(StmtContext.class,i);
+		}
+		public BlockContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_block; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterBlock(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitBlock(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitBlock(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final BlockContext block() throws RecognitionException {
+		BlockContext _localctx = new BlockContext(_ctx, getState());
+		enterRule(_localctx, 12, RULE_block);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(68);
+			match(T__5);
+			setState(72);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while ((((_la) & ~0x3f) == 0 && ((1L << _la) & 7340032L) != 0)) {
+				{
+				{
+				setState(69);
+				var();
+				}
+				}
+				setState(74);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			setState(78);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while ((((_la) & ~0x3f) == 0 && ((1L << _la) & 8419840L) != 0)) {
+				{
+				{
+				setState(75);
+				stmt();
+				}
+				}
+				setState(80);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			setState(81);
+			match(T__6);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class StmtContext extends ParserRuleContext {
+		public StmtContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_stmt; }
+	 
+		public StmtContext() { }
+		public void copyFrom(StmtContext ctx) {
+			super.copyFrom(ctx);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class ReturnVoidContext extends StmtContext {
+		public ReturnVoidContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterReturnVoid(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitReturnVoid(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitReturnVoid(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class ReturnContext extends StmtContext {
+		public ExprContext expr() {
+			return getRuleContext(ExprContext.class,0);
+		}
+		public ReturnContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterReturn(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitReturn(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitReturn(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class BreakContext extends StmtContext {
+		public BreakContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterBreak(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitBreak(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitBreak(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class AssignContext extends StmtContext {
+		public LocContext loc() {
+			return getRuleContext(LocContext.class,0);
+		}
+		public ExprContext expr() {
+			return getRuleContext(ExprContext.class,0);
+		}
+		public AssignContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterAssign(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitAssign(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitAssign(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class FunctionCallContext extends StmtContext {
+		public FuncCallContext funcCall() {
+			return getRuleContext(FuncCallContext.class,0);
+		}
+		public FunctionCallContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterFunctionCall(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitFunctionCall(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitFunctionCall(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class WhileContext extends StmtContext {
+		public ExprContext expr() {
+			return getRuleContext(ExprContext.class,0);
+		}
+		public BlockContext block() {
+			return getRuleContext(BlockContext.class,0);
+		}
+		public WhileContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterWhile(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitWhile(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitWhile(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class ContinueContext extends StmtContext {
+		public ContinueContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterContinue(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitContinue(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitContinue(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class IfContext extends StmtContext {
+		public ExprContext expr() {
+			return getRuleContext(ExprContext.class,0);
+		}
+		public List<BlockContext> block() {
+			return getRuleContexts(BlockContext.class);
+		}
+		public BlockContext block(int i) {
+			return getRuleContext(BlockContext.class,i);
+		}
+		public IfContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterIf(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitIf(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitIf(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final StmtContext stmt() throws RecognitionException {
+		StmtContext _localctx = new StmtContext(_ctx, getState());
+		enterRule(_localctx, 14, RULE_stmt);
+		int _la;
+		try {
+			setState(116);
+			_errHandler.sync(this);
+			switch ( getInterpreter().adaptivePredict(_input,7,_ctx) ) {
+			case 1:
+				_localctx = new AssignContext(_localctx);
+				enterOuterAlt(_localctx, 1);
+				{
+				setState(83);
+				loc();
+				setState(84);
+				match(T__7);
+				setState(85);
+				expr(0);
+				setState(86);
+				match(T__0);
+				}
+				break;
+			case 2:
+				_localctx = new FunctionCallContext(_localctx);
+				enterOuterAlt(_localctx, 2);
+				{
+				setState(88);
+				funcCall();
+				setState(89);
+				match(T__0);
+				}
+				break;
+			case 3:
+				_localctx = new IfContext(_localctx);
+				enterOuterAlt(_localctx, 3);
+				{
+				setState(91);
+				match(T__8);
+				setState(92);
+				match(T__2);
+				setState(93);
+				expr(0);
+				setState(94);
+				match(T__3);
+				setState(95);
+				block();
+				setState(98);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+				if (_la==T__9) {
+					{
+					setState(96);
+					match(T__9);
+					setState(97);
+					block();
+					}
+				}
+
+				}
+				break;
+			case 4:
+				_localctx = new WhileContext(_localctx);
+				enterOuterAlt(_localctx, 4);
+				{
+				setState(100);
+				match(T__10);
+				setState(101);
+				match(T__2);
+				setState(102);
+				expr(0);
+				setState(103);
+				match(T__3);
+				setState(104);
+				block();
+				}
+				break;
+			case 5:
+				_localctx = new ReturnContext(_localctx);
+				enterOuterAlt(_localctx, 5);
+				{
+				setState(106);
+				match(T__11);
+				setState(107);
+				expr(0);
+				setState(108);
+				match(T__0);
+				}
+				break;
+			case 6:
+				_localctx = new ReturnVoidContext(_localctx);
+				enterOuterAlt(_localctx, 6);
+				{
+				setState(110);
+				match(T__11);
+				setState(111);
+				match(T__0);
+				}
+				break;
+			case 7:
+				_localctx = new BreakContext(_localctx);
+				enterOuterAlt(_localctx, 7);
+				{
+				setState(112);
+				match(T__12);
+				setState(113);
+				match(T__0);
+				}
+				break;
+			case 8:
+				_localctx = new ContinueContext(_localctx);
+				enterOuterAlt(_localctx, 8);
+				{
+				setState(114);
+				match(T__13);
+				setState(115);
+				match(T__0);
+				}
+				break;
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class ExprContext extends ParserRuleContext {
+		public ExprContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_expr; }
+	 
+		public ExprContext() { }
+		public void copyFrom(ExprContext ctx) {
+			super.copyFrom(ctx);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class ExpressionContext extends ExprContext {
+		public ExprContext expr() {
+			return getRuleContext(ExprContext.class,0);
+		}
+		public ExpressionContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterExpression(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitExpression(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitExpression(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class FunCallExpressionContext extends ExprContext {
+		public FuncCallContext funcCall() {
+			return getRuleContext(FuncCallContext.class,0);
+		}
+		public FunCallExpressionContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterFunCallExpression(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitFunCallExpression(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitFunCallExpression(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class ConstantContext extends ExprContext {
+		public LiteralContext literal() {
+			return getRuleContext(LiteralContext.class,0);
+		}
+		public ConstantContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterConstant(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitConstant(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitConstant(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class BinaryOperationContext extends ExprContext {
+		public List<ExprContext> expr() {
+			return getRuleContexts(ExprContext.class);
+		}
+		public ExprContext expr(int i) {
+			return getRuleContext(ExprContext.class,i);
+		}
+		public BinaryOpContext binaryOp() {
+			return getRuleContext(BinaryOpContext.class,0);
+		}
+		public BinaryOperationContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterBinaryOperation(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitBinaryOperation(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitBinaryOperation(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class LocationContext extends ExprContext {
+		public LocContext loc() {
+			return getRuleContext(LocContext.class,0);
+		}
+		public LocationContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterLocation(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitLocation(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitLocation(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ExprContext expr() throws RecognitionException {
+		return expr(0);
+	}
+
+	private ExprContext expr(int _p) throws RecognitionException {
+		ParserRuleContext _parentctx = _ctx;
+		int _parentState = getState();
+		ExprContext _localctx = new ExprContext(_ctx, _parentState);
+		ExprContext _prevctx = _localctx;
+		int _startState = 16;
+		enterRecursionRule(_localctx, 16, RULE_expr, _p);
+		try {
+			int _alt;
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(126);
+			_errHandler.sync(this);
+			switch ( getInterpreter().adaptivePredict(_input,8,_ctx) ) {
+			case 1:
+				{
+				_localctx = new ConstantContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+
+				setState(119);
+				literal();
+				}
+				break;
+			case 2:
+				{
+				_localctx = new ExpressionContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+				setState(120);
+				match(T__2);
+				setState(121);
+				expr(0);
+				setState(122);
+				match(T__3);
+				}
+				break;
+			case 3:
+				{
+				_localctx = new FunCallExpressionContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+				setState(124);
+				funcCall();
+				}
+				break;
+			case 4:
+				{
+				_localctx = new LocationContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+				setState(125);
+				loc();
+				}
+				break;
+			}
+			_ctx.stop = _input.LT(-1);
+			setState(134);
+			_errHandler.sync(this);
+			_alt = getInterpreter().adaptivePredict(_input,9,_ctx);
+			while ( _alt!=2 && _alt!=org.antlr.v4.runtime.atn.ATN.INVALID_ALT_NUMBER ) {
+				if ( _alt==1 ) {
+					if ( _parseListeners!=null ) triggerExitRuleEvent();
+					_prevctx = _localctx;
+					{
+					{
+					_localctx = new BinaryOperationContext(new ExprContext(_parentctx, _parentState));
+					pushNewRecursionContext(_localctx, _startState, RULE_expr);
+					setState(128);
+					if (!(precpred(_ctx, 5))) throw new FailedPredicateException(this, "precpred(_ctx, 5)");
+					setState(129);
+					binaryOp();
+					setState(130);
+					expr(6);
+					}
+					} 
+				}
+				setState(136);
+				_errHandler.sync(this);
+				_alt = getInterpreter().adaptivePredict(_input,9,_ctx);
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			unrollRecursionContexts(_parentctx);
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class BinaryOpContext extends ParserRuleContext {
+		public TerminalNode ADD() { return getToken(DecafParser.ADD, 0); }
+		public TerminalNode SUB() { return getToken(DecafParser.SUB, 0); }
+		public TerminalNode MUL() { return getToken(DecafParser.MUL, 0); }
+		public BinaryOpContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_binaryOp; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterBinaryOp(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitBinaryOp(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitBinaryOp(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final BinaryOpContext binaryOp() throws RecognitionException {
+		BinaryOpContext _localctx = new BinaryOpContext(_ctx, getState());
+		enterRule(_localctx, 18, RULE_binaryOp);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(137);
+			_la = _input.LA(1);
+			if ( !((((_la) & ~0x3f) == 0 && ((1L << _la) & 917504L) != 0)) ) {
+			_errHandler.recoverInline(this);
+			}
+			else {
+				if ( _input.LA(1)==Token.EOF ) matchedEOF = true;
+				_errHandler.reportMatch(this);
+				consume();
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class LocContext extends ParserRuleContext {
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public LocContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_loc; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterLoc(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitLoc(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitLoc(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final LocContext loc() throws RecognitionException {
+		LocContext _localctx = new LocContext(_ctx, getState());
+		enterRule(_localctx, 20, RULE_loc);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(139);
+			id();
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class FuncCallContext extends ParserRuleContext {
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public ArgsContext args() {
+			return getRuleContext(ArgsContext.class,0);
+		}
+		public FuncCallContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_funcCall; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterFuncCall(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitFuncCall(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitFuncCall(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final FuncCallContext funcCall() throws RecognitionException {
+		FuncCallContext _localctx = new FuncCallContext(_ctx, getState());
+		enterRule(_localctx, 22, RULE_funcCall);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(141);
+			id();
+			setState(142);
+			match(T__2);
+			setState(144);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			if ((((_la) & ~0x3f) == 0 && ((1L << _la) & 25264136L) != 0)) {
+				{
+				setState(143);
+				args();
+				}
+			}
+
+			setState(146);
+			match(T__3);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class ArgsContext extends ParserRuleContext {
+		public List<ExprContext> expr() {
+			return getRuleContexts(ExprContext.class);
+		}
+		public ExprContext expr(int i) {
+			return getRuleContext(ExprContext.class,i);
+		}
+		public ArgsContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_args; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterArgs(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitArgs(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitArgs(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ArgsContext args() throws RecognitionException {
+		ArgsContext _localctx = new ArgsContext(_ctx, getState());
+		enterRule(_localctx, 24, RULE_args);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(148);
+			expr(0);
+			setState(153);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while (_la==T__4) {
+				{
+				{
+				setState(149);
+				match(T__4);
+				setState(150);
+				expr(0);
+				}
+				}
+				setState(155);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class LiteralContext extends ParserRuleContext {
+		public NumberContext number() {
+			return getRuleContext(NumberContext.class,0);
+		}
+		public BooleanContext boolean_() {
+			return getRuleContext(BooleanContext.class,0);
+		}
+		public LiteralContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_literal; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterLiteral(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitLiteral(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitLiteral(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final LiteralContext literal() throws RecognitionException {
+		LiteralContext _localctx = new LiteralContext(_ctx, getState());
+		enterRule(_localctx, 26, RULE_literal);
+		try {
+			setState(158);
+			_errHandler.sync(this);
+			switch (_input.LA(1)) {
+			case Number:
+				enterOuterAlt(_localctx, 1);
+				{
+				setState(156);
+				number();
+				}
+				break;
+			case T__14:
+			case T__15:
+				enterOuterAlt(_localctx, 2);
+				{
+				setState(157);
+				boolean_();
+				}
+				break;
+			default:
+				throw new NoViableAltException(this);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class BooleanContext extends ParserRuleContext {
+		public BooleanContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_boolean; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterBoolean(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitBoolean(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitBoolean(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final BooleanContext boolean_() throws RecognitionException {
+		BooleanContext _localctx = new BooleanContext(_ctx, getState());
+		enterRule(_localctx, 28, RULE_boolean);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(160);
+			_la = _input.LA(1);
+			if ( !(_la==T__14 || _la==T__15) ) {
+			_errHandler.recoverInline(this);
+			}
+			else {
+				if ( _input.LA(1)==Token.EOF ) matchedEOF = true;
+				_errHandler.reportMatch(this);
+				consume();
+			}
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class NumberContext extends ParserRuleContext {
+		public TerminalNode Number() { return getToken(DecafParser.Number, 0); }
+		public NumberContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_number; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterNumber(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitNumber(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitNumber(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final NumberContext number() throws RecognitionException {
+		NumberContext _localctx = new NumberContext(_ctx, getState());
+		enterRule(_localctx, 30, RULE_number);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(162);
+			match(Number);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class IdContext extends ParserRuleContext {
+		public TerminalNode IDENTIFIER() { return getToken(DecafParser.IDENTIFIER, 0); }
+		public IdContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_id; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterId(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitId(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitId(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final IdContext id() throws RecognitionException {
+		IdContext _localctx = new IdContext(_ctx, getState());
+		enterRule(_localctx, 32, RULE_id);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(164);
+			match(IDENTIFIER);
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	public boolean sempred(RuleContext _localctx, int ruleIndex, int predIndex) {
+		switch (ruleIndex) {
+		case 8:
+			return expr_sempred((ExprContext)_localctx, predIndex);
+		}
+		return true;
+	}
+	private boolean expr_sempred(ExprContext _localctx, int predIndex) {
+		switch (predIndex) {
+		case 0:
+			return precpred(_ctx, 5);
+		}
+		return true;
+	}
+
+	public static final String _serializedATN =
+		"\u0004\u0001\u0019\u00a7\u0002\u0000\u0007\u0000\u0002\u0001\u0007\u0001"+
+		"\u0002\u0002\u0007\u0002\u0002\u0003\u0007\u0003\u0002\u0004\u0007\u0004"+
+		"\u0002\u0005\u0007\u0005\u0002\u0006\u0007\u0006\u0002\u0007\u0007\u0007"+
+		"\u0002\b\u0007\b\u0002\t\u0007\t\u0002\n\u0007\n\u0002\u000b\u0007\u000b"+
+		"\u0002\f\u0007\f\u0002\r\u0007\r\u0002\u000e\u0007\u000e\u0002\u000f\u0007"+
+		"\u000f\u0002\u0010\u0007\u0010\u0001\u0000\u0001\u0000\u0005\u0000%\b"+
+		"\u0000\n\u0000\f\u0000(\t\u0000\u0001\u0001\u0001\u0001\u0001\u0001\u0001"+
+		"\u0001\u0001\u0002\u0001\u0002\u0001\u0003\u0001\u0003\u0001\u0003\u0001"+
+		"\u0003\u0001\u0003\u0003\u00035\b\u0003\u0001\u0003\u0001\u0003\u0001"+
+		"\u0003\u0001\u0004\u0001\u0004\u0001\u0004\u0005\u0004=\b\u0004\n\u0004"+
+		"\f\u0004@\t\u0004\u0001\u0005\u0001\u0005\u0001\u0005\u0001\u0006\u0001"+
+		"\u0006\u0005\u0006G\b\u0006\n\u0006\f\u0006J\t\u0006\u0001\u0006\u0005"+
+		"\u0006M\b\u0006\n\u0006\f\u0006P\t\u0006\u0001\u0006\u0001\u0006\u0001"+
+		"\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001"+
+		"\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001"+
+		"\u0007\u0001\u0007\u0001\u0007\u0003\u0007c\b\u0007\u0001\u0007\u0001"+
+		"\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001"+
+		"\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001"+
+		"\u0007\u0001\u0007\u0001\u0007\u0003\u0007u\b\u0007\u0001\b\u0001\b\u0001"+
+		"\b\u0001\b\u0001\b\u0001\b\u0001\b\u0001\b\u0003\b\u007f\b\b\u0001\b\u0001"+
+		"\b\u0001\b\u0001\b\u0005\b\u0085\b\b\n\b\f\b\u0088\t\b\u0001\t\u0001\t"+
+		"\u0001\n\u0001\n\u0001\u000b\u0001\u000b\u0001\u000b\u0003\u000b\u0091"+
+		"\b\u000b\u0001\u000b\u0001\u000b\u0001\f\u0001\f\u0001\f\u0005\f\u0098"+
+		"\b\f\n\f\f\f\u009b\t\f\u0001\r\u0001\r\u0003\r\u009f\b\r\u0001\u000e\u0001"+
+		"\u000e\u0001\u000f\u0001\u000f\u0001\u0010\u0001\u0010\u0001\u0010\u0000"+
+		"\u0001\u0010\u0011\u0000\u0002\u0004\u0006\b\n\f\u000e\u0010\u0012\u0014"+
+		"\u0016\u0018\u001a\u001c\u001e \u0000\u0003\u0001\u0000\u0014\u0016\u0001"+
+		"\u0000\u0011\u0013\u0001\u0000\u000f\u0010\u00aa\u0000&\u0001\u0000\u0000"+
+		"\u0000\u0002)\u0001\u0000\u0000\u0000\u0004-\u0001\u0000\u0000\u0000\u0006"+
+		"/\u0001\u0000\u0000\u0000\b9\u0001\u0000\u0000\u0000\nA\u0001\u0000\u0000"+
+		"\u0000\fD\u0001\u0000\u0000\u0000\u000et\u0001\u0000\u0000\u0000\u0010"+
+		"~\u0001\u0000\u0000\u0000\u0012\u0089\u0001\u0000\u0000\u0000\u0014\u008b"+
+		"\u0001\u0000\u0000\u0000\u0016\u008d\u0001\u0000\u0000\u0000\u0018\u0094"+
+		"\u0001\u0000\u0000\u0000\u001a\u009e\u0001\u0000\u0000\u0000\u001c\u00a0"+
+		"\u0001\u0000\u0000\u0000\u001e\u00a2\u0001\u0000\u0000\u0000 \u00a4\u0001"+
+		"\u0000\u0000\u0000\"%\u0003\u0002\u0001\u0000#%\u0003\u0006\u0003\u0000"+
+		"$\"\u0001\u0000\u0000\u0000$#\u0001\u0000\u0000\u0000%(\u0001\u0000\u0000"+
+		"\u0000&$\u0001\u0000\u0000\u0000&\'\u0001\u0000\u0000\u0000\'\u0001\u0001"+
+		"\u0000\u0000\u0000(&\u0001\u0000\u0000\u0000)*\u0003\u0004\u0002\u0000"+
+		"*+\u0003 \u0010\u0000+,\u0005\u0001\u0000\u0000,\u0003\u0001\u0000\u0000"+
+		"\u0000-.\u0007\u0000\u0000\u0000.\u0005\u0001\u0000\u0000\u0000/0\u0005"+
+		"\u0002\u0000\u000001\u0003\u0004\u0002\u000012\u0003 \u0010\u000024\u0005"+
+		"\u0003\u0000\u000035\u0003\b\u0004\u000043\u0001\u0000\u0000\u000045\u0001"+
+		"\u0000\u0000\u000056\u0001\u0000\u0000\u000067\u0005\u0004\u0000\u0000"+
+		"78\u0003\f\u0006\u00008\u0007\u0001\u0000\u0000\u00009>\u0003\n\u0005"+
+		"\u0000:;\u0005\u0005\u0000\u0000;=\u0003\n\u0005\u0000<:\u0001\u0000\u0000"+
+		"\u0000=@\u0001\u0000\u0000\u0000><\u0001\u0000\u0000\u0000>?\u0001\u0000"+
+		"\u0000\u0000?\t\u0001\u0000\u0000\u0000@>\u0001\u0000\u0000\u0000AB\u0003"+
+		"\u0004\u0002\u0000BC\u0003 \u0010\u0000C\u000b\u0001\u0000\u0000\u0000"+
+		"DH\u0005\u0006\u0000\u0000EG\u0003\u0002\u0001\u0000FE\u0001\u0000\u0000"+
+		"\u0000GJ\u0001\u0000\u0000\u0000HF\u0001\u0000\u0000\u0000HI\u0001\u0000"+
+		"\u0000\u0000IN\u0001\u0000\u0000\u0000JH\u0001\u0000\u0000\u0000KM\u0003"+
+		"\u000e\u0007\u0000LK\u0001\u0000\u0000\u0000MP\u0001\u0000\u0000\u0000"+
+		"NL\u0001\u0000\u0000\u0000NO\u0001\u0000\u0000\u0000OQ\u0001\u0000\u0000"+
+		"\u0000PN\u0001\u0000\u0000\u0000QR\u0005\u0007\u0000\u0000R\r\u0001\u0000"+
+		"\u0000\u0000ST\u0003\u0014\n\u0000TU\u0005\b\u0000\u0000UV\u0003\u0010"+
+		"\b\u0000VW\u0005\u0001\u0000\u0000Wu\u0001\u0000\u0000\u0000XY\u0003\u0016"+
+		"\u000b\u0000YZ\u0005\u0001\u0000\u0000Zu\u0001\u0000\u0000\u0000[\\\u0005"+
+		"\t\u0000\u0000\\]\u0005\u0003\u0000\u0000]^\u0003\u0010\b\u0000^_\u0005"+
+		"\u0004\u0000\u0000_b\u0003\f\u0006\u0000`a\u0005\n\u0000\u0000ac\u0003"+
+		"\f\u0006\u0000b`\u0001\u0000\u0000\u0000bc\u0001\u0000\u0000\u0000cu\u0001"+
+		"\u0000\u0000\u0000de\u0005\u000b\u0000\u0000ef\u0005\u0003\u0000\u0000"+
+		"fg\u0003\u0010\b\u0000gh\u0005\u0004\u0000\u0000hi\u0003\f\u0006\u0000"+
+		"iu\u0001\u0000\u0000\u0000jk\u0005\f\u0000\u0000kl\u0003\u0010\b\u0000"+
+		"lm\u0005\u0001\u0000\u0000mu\u0001\u0000\u0000\u0000no\u0005\f\u0000\u0000"+
+		"ou\u0005\u0001\u0000\u0000pq\u0005\r\u0000\u0000qu\u0005\u0001\u0000\u0000"+
+		"rs\u0005\u000e\u0000\u0000su\u0005\u0001\u0000\u0000tS\u0001\u0000\u0000"+
+		"\u0000tX\u0001\u0000\u0000\u0000t[\u0001\u0000\u0000\u0000td\u0001\u0000"+
+		"\u0000\u0000tj\u0001\u0000\u0000\u0000tn\u0001\u0000\u0000\u0000tp\u0001"+
+		"\u0000\u0000\u0000tr\u0001\u0000\u0000\u0000u\u000f\u0001\u0000\u0000"+
+		"\u0000vw\u0006\b\uffff\uffff\u0000w\u007f\u0003\u001a\r\u0000xy\u0005"+
+		"\u0003\u0000\u0000yz\u0003\u0010\b\u0000z{\u0005\u0004\u0000\u0000{\u007f"+
+		"\u0001\u0000\u0000\u0000|\u007f\u0003\u0016\u000b\u0000}\u007f\u0003\u0014"+
+		"\n\u0000~v\u0001\u0000\u0000\u0000~x\u0001\u0000\u0000\u0000~|\u0001\u0000"+
+		"\u0000\u0000~}\u0001\u0000\u0000\u0000\u007f\u0086\u0001\u0000\u0000\u0000"+
+		"\u0080\u0081\n\u0005\u0000\u0000\u0081\u0082\u0003\u0012\t\u0000\u0082"+
+		"\u0083\u0003\u0010\b\u0006\u0083\u0085\u0001\u0000\u0000\u0000\u0084\u0080"+
+		"\u0001\u0000\u0000\u0000\u0085\u0088\u0001\u0000\u0000\u0000\u0086\u0084"+
+		"\u0001\u0000\u0000\u0000\u0086\u0087\u0001\u0000\u0000\u0000\u0087\u0011"+
+		"\u0001\u0000\u0000\u0000\u0088\u0086\u0001\u0000\u0000\u0000\u0089\u008a"+
+		"\u0007\u0001\u0000\u0000\u008a\u0013\u0001\u0000\u0000\u0000\u008b\u008c"+
+		"\u0003 \u0010\u0000\u008c\u0015\u0001\u0000\u0000\u0000\u008d\u008e\u0003"+
+		" \u0010\u0000\u008e\u0090\u0005\u0003\u0000\u0000\u008f\u0091\u0003\u0018"+
+		"\f\u0000\u0090\u008f\u0001\u0000\u0000\u0000\u0090\u0091\u0001\u0000\u0000"+
+		"\u0000\u0091\u0092\u0001\u0000\u0000\u0000\u0092\u0093\u0005\u0004\u0000"+
+		"\u0000\u0093\u0017\u0001\u0000\u0000\u0000\u0094\u0099\u0003\u0010\b\u0000"+
+		"\u0095\u0096\u0005\u0005\u0000\u0000\u0096\u0098\u0003\u0010\b\u0000\u0097"+
+		"\u0095\u0001\u0000\u0000\u0000\u0098\u009b\u0001\u0000\u0000\u0000\u0099"+
+		"\u0097\u0001\u0000\u0000\u0000\u0099\u009a\u0001\u0000\u0000\u0000\u009a"+
+		"\u0019\u0001\u0000\u0000\u0000\u009b\u0099\u0001\u0000\u0000\u0000\u009c"+
+		"\u009f\u0003\u001e\u000f\u0000\u009d\u009f\u0003\u001c\u000e\u0000\u009e"+
+		"\u009c\u0001\u0000\u0000\u0000\u009e\u009d\u0001\u0000\u0000\u0000\u009f"+
+		"\u001b\u0001\u0000\u0000\u0000\u00a0\u00a1\u0007\u0002\u0000\u0000\u00a1"+
+		"\u001d\u0001\u0000\u0000\u0000\u00a2\u00a3\u0005\u0018\u0000\u0000\u00a3"+
+		"\u001f\u0001\u0000\u0000\u0000\u00a4\u00a5\u0005\u0017\u0000\u0000\u00a5"+
+		"!\u0001\u0000\u0000\u0000\r$&4>HNbt~\u0086\u0090\u0099\u009e";
+	public static final ATN _ATN =
+		new ATNDeserializer().deserialize(_serializedATN.toCharArray());
+	static {
+		_decisionToDFA = new DFA[_ATN.getNumberOfDecisions()];
+		for (int i = 0; i < _ATN.getNumberOfDecisions(); i++) {
+			_decisionToDFA[i] = new DFA(_ATN.getDecisionState(i), i);
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/main/java/de/dhbw/horb/ast/DecafVisitor.java b/src/main/java/de/dhbw/horb/ast/DecafVisitor.java
new file mode 100644
index 0000000..d328fa0
--- /dev/null
+++ b/src/main/java/de/dhbw/horb/ast/DecafVisitor.java
@@ -0,0 +1,194 @@
+// Generated from C:/Users/laure/Documents/Dev/Compilerbau/LearningANTLR/UeBung2/AntlrAssignment3/src/main/antlr4/de/dhbw/horb/Decaf.g4 by ANTLR 4.13.1
+package de.dhbw.horb.ast;
+import org.antlr.v4.runtime.tree.ParseTreeVisitor;
+
+/**
+ * This interface defines a complete generic visitor for a parse tree produced
+ * by {@link DecafParser}.
+ *
+ * @param <T> The return type of the visit operation. Use {@link Void} for
+ * operations with no return type.
+ */
+public interface DecafVisitor<T> extends ParseTreeVisitor<T> {
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#program}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitProgram(DecafParser.ProgramContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#var}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitVar(DecafParser.VarContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#type}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitType(DecafParser.TypeContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#func}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitFunc(DecafParser.FuncContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#params}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitParams(DecafParser.ParamsContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#param}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitParam(DecafParser.ParamContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#block}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitBlock(DecafParser.BlockContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Assign}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitAssign(DecafParser.AssignContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code FunctionCall}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitFunctionCall(DecafParser.FunctionCallContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code If}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitIf(DecafParser.IfContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code While}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitWhile(DecafParser.WhileContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Return}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitReturn(DecafParser.ReturnContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code ReturnVoid}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitReturnVoid(DecafParser.ReturnVoidContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Break}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitBreak(DecafParser.BreakContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Continue}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitContinue(DecafParser.ContinueContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Expression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitExpression(DecafParser.ExpressionContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code FunCallExpression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitFunCallExpression(DecafParser.FunCallExpressionContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Constant}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitConstant(DecafParser.ConstantContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code BinaryOperation}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitBinaryOperation(DecafParser.BinaryOperationContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Location}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitLocation(DecafParser.LocationContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#binaryOp}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitBinaryOp(DecafParser.BinaryOpContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#loc}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitLoc(DecafParser.LocContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#funcCall}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitFuncCall(DecafParser.FuncCallContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#args}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitArgs(DecafParser.ArgsContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#literal}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitLiteral(DecafParser.LiteralContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#boolean}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitBoolean(DecafParser.BooleanContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#number}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitNumber(DecafParser.NumberContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#id}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitId(DecafParser.IdContext ctx);
+}
\ No newline at end of file
diff --git a/src/main/java/de/dhbw/horb/ast/Function.java b/src/main/java/de/dhbw/horb/ast/Function.java
index e55a8de..127c24d 100644
--- a/src/main/java/de/dhbw/horb/ast/Function.java
+++ b/src/main/java/de/dhbw/horb/ast/Function.java
@@ -2,6 +2,5 @@ package de.dhbw.horb.ast;
 
 import java.util.List;
 
-public record Function(Type type, String name, List<Variable> params,
-                       Block block) implements Node {
+public record Function(Type type, String name, List<Variable> params, Block block) implements Node {
 }
diff --git a/src/main/java/de/dhbw/horb/ast/FunctionCall.java b/src/main/java/de/dhbw/horb/ast/FunctionCall.java
index 85150f5..ffa6edd 100644
--- a/src/main/java/de/dhbw/horb/ast/FunctionCall.java
+++ b/src/main/java/de/dhbw/horb/ast/FunctionCall.java
@@ -2,5 +2,5 @@ package de.dhbw.horb.ast;
 
 import java.util.List;
 
-public record FunctionCall(String name, List<Expression> args) implements Expression {
+public record FunctionCall(String name, List<Expression> args) implements Expression, Statement {
 }
diff --git a/src/main/java/de/dhbw/horb/ast/Statement.java b/src/main/java/de/dhbw/horb/ast/Statement.java
index 11bbbdb..6645cbb 100644
--- a/src/main/java/de/dhbw/horb/ast/Statement.java
+++ b/src/main/java/de/dhbw/horb/ast/Statement.java
@@ -1,4 +1,4 @@
 package de.dhbw.horb.ast;
 
-public sealed interface Statement extends Node permits Assignment, VoidFunctionCall, IfElse, While, Return, ReturnVoid, Break, Continue {
+public sealed interface Statement extends Node permits Assignment, VoidFunctionCall, IfElse, While, Return, ReturnVoid, Break, Continue, FunctionCall {
 }
diff --git a/src/test/java/de/dhbw/horb/CompilerTest.java b/src/test/java/de/dhbw/horb/CompilerTest.java
index 79d1049..598179c 100644
--- a/src/test/java/de/dhbw/horb/CompilerTest.java
+++ b/src/test/java/de/dhbw/horb/CompilerTest.java
@@ -1,10 +1,10 @@
 package de.dhbw.horb;
 
-import static org.junit.Assert.assertTrue;
-
 import de.dhbw.horb.ast.Program;
 import org.junit.Test;
 
+import static org.junit.Assert.assertTrue;
+
 /**
  * Unit test for simple App.
  */
@@ -16,16 +16,17 @@ public class CompilerTest
     @Test
     public void generateASTTest()
     {
-        String inputString = "def int add(int x, int y)\n" +
-                "{\n" +
-                "return x + y;\n" +
-                "}\n" +
-                "def int main()\n" +
-                "{\n" +
-                "int a;\n" +
-                "a = 3;\n" +
-                "return add(a, 2);\n" +
-                "}";
+        String inputString = """
+                def int add(int x, int y)
+                {
+                return x + y;
+                }
+                def int main()
+                {
+                int a;
+                a = 3;
+                return add(a, 2);
+                }""";
         Program ast = Compiler.generateAST(inputString);
         assertTrue( ast.methods().size() == 2 );
     }
diff --git a/src/test/java/de/dhbw/horb/StatementGeneratorTest.java b/src/test/java/de/dhbw/horb/StatementGeneratorTest.java
index 4229bf1..4a6fba6 100644
--- a/src/test/java/de/dhbw/horb/StatementGeneratorTest.java
+++ b/src/test/java/de/dhbw/horb/StatementGeneratorTest.java
@@ -6,6 +6,7 @@ import org.antlr.v4.runtime.CharStreams;
 import org.antlr.v4.runtime.CommonTokenStream;
 import org.junit.Test;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 /**
@@ -18,7 +19,29 @@ public class StatementGeneratorTest
     {
         Statement whileStmt = generateStatement("while(true){}");
         assertTrue(whileStmt instanceof While);
-        assertTrue( ((While) whileStmt).block().stmts().size() == 0);
+        assertEquals(0, ((While) whileStmt).block().stmts().size());
+    }
+    @Test
+    public void ifTest()
+    {
+        Statement ifStmt = generateStatement("if(x+3){}");
+        assertTrue(ifStmt instanceof IfElse);
+        assertEquals(0, ((IfElse) ifStmt).elseBlock().stmts().size());
+    }
+    @Test
+    public void ifElseTest()
+    {
+        Statement ifStmt = generateStatement("if(x+3){} else {int b;}");
+        assertTrue(ifStmt instanceof IfElse);
+        assertEquals(1, ((IfElse) ifStmt).elseBlock().vars().size());
+    }
+    @Test
+    public void functionCallTest()
+    {
+        Statement funcStmt = generateStatement("m(x,y);");
+        assertTrue(funcStmt instanceof FunctionCall);
+        assertEquals("m", ((FunctionCall) funcStmt).name());
+        assertEquals(2, ((FunctionCall) funcStmt).args().size());
     }
 
     private Statement generateStatement(String from){
@@ -27,6 +50,6 @@ public class StatementGeneratorTest
         DecafLexer lexer = new DecafLexer(input);
         CommonTokenStream tokens = new CommonTokenStream(lexer);
         DecafParser parser = new DecafParser(tokens);
-        return new StatementGenerator().visit(parser.stmt());
+        return parser.stmt().accept(new StatementGenerator());
     }
 }
\ No newline at end of file