diff --git a/src/main/java/de/maishai/ASTGenerator.java b/src/main/java/de/maishai/ASTGenerator.java
new file mode 100644
index 0000000..5691d63
--- /dev/null
+++ b/src/main/java/de/maishai/ASTGenerator.java
@@ -0,0 +1,74 @@
+package de.maishai;
+
+import de.maishai.antlr.DecafParser;
+import de.maishai.ast.ReturnType;
+import de.maishai.ast.Type;
+import de.maishai.ast.records.*;
+import de.maishai.ast.records.Class;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ASTGenerator {
+
+    public static Program generateAST(DecafParser.ProgramContext parseTree){
+        List<Class> classes = new ArrayList<>();
+        for(DecafParser.ClassContext cctx : parseTree.class_()){
+            classes.add(generateClass(cctx));
+        }
+        return new Program(classes);
+    }
+
+    public static Class generateClass(DecafParser.ClassContext ctx) {
+        List<Variable> vars = new ArrayList<>();
+        if(ctx.var() != null){
+            vars = ctx.var().stream().map(ASTGenerator::generateVariable).toList();
+        }
+        List<Method> meths = new ArrayList<>();
+        if(ctx.meth() != null){
+            meths = ctx.meth().stream().map(ASTGenerator::generateMethod).toList();
+        }
+        Id classId = new Id(ctx.id().getText());
+        return new Class(classId, vars, meths);
+    }
+
+    public static Variable generateVariable(DecafParser.VarContext ctx) {
+        return new Variable(ctx.id().getText(), getType(ctx.type()));
+    }
+
+    public static Parameter generateParameter(DecafParser.ParamContext ctx) {
+        return new Parameter(ctx.id().getText(), getType(ctx.type()));
+    }
+
+    public static Method generateMethod(DecafParser.MethContext ctx) {
+        List<Parameter> params = new ArrayList<>();
+        if(ctx.params() != null){
+            params = ctx.params().param().stream().map(ASTGenerator::generateParameter).toList();
+        }
+        Block block = new BlockGenerator().visit(ctx.block());
+        Id methId = new Id(ctx.id().getText());
+        return new Method(getReturnType(ctx.returntype()), methId, params, block);
+    }
+
+    public static Type getType(DecafParser.TypeContext ctx){
+        if(ctx.INT() != null)
+            return Type.INT;
+        if(ctx.BOOL() != null)
+            return Type.BOOL;
+        if(ctx.CHAR() != null)
+            return Type.CHAR;
+        throw new RuntimeException();
+    }
+
+    public static ReturnType getReturnType(DecafParser.ReturntypeContext ctx){
+        if(ctx.type().INT() != null)
+            return ReturnType.INT;
+        if(ctx.type().BOOL() != null)
+            return ReturnType.BOOL;
+        if(ctx.type().CHAR() != null)
+            return ReturnType.CHAR;
+        if(ctx.VOID() != null)
+            return ReturnType.VOID;
+        throw new RuntimeException();
+    }
+}
diff --git a/src/main/java/de/maishai/BlockGenerator.java b/src/main/java/de/maishai/BlockGenerator.java
new file mode 100644
index 0000000..7d9e616
--- /dev/null
+++ b/src/main/java/de/maishai/BlockGenerator.java
@@ -0,0 +1,18 @@
+package de.maishai;
+
+import de.maishai.antlr.DecafBaseVisitor;
+import de.maishai.antlr.DecafParser;
+import de.maishai.ast.Statement;
+import de.maishai.ast.records.Block;
+import de.maishai.ast.records.Variable;
+
+import java.util.List;
+
+public class BlockGenerator extends DecafBaseVisitor<Block> {
+    @Override
+    public Block visitBlock(DecafParser.BlockContext ctx) {
+        List<Variable> vars = ctx.var().stream().map(var -> new VariableGenerator().visit(var)).toList();
+        List<Statement> statements = ctx.stmt().stream().map(stmt -> new StatementGenerator().visit(stmt)).toList();
+        return new Block(vars, statements);
+    }
+}
diff --git a/src/main/java/de/maishai/Compiler.java b/src/main/java/de/maishai/Compiler.java
new file mode 100644
index 0000000..30cb545
--- /dev/null
+++ b/src/main/java/de/maishai/Compiler.java
@@ -0,0 +1,26 @@
+package de.maishai;
+
+import de.maishai.antlr.DecafLexer;
+import de.maishai.antlr.DecafParser;
+import de.maishai.ast.records.Program;
+import org.antlr.v4.runtime.CharStream;
+import org.antlr.v4.runtime.CharStreams;
+import org.antlr.v4.runtime.CommonTokenStream;
+
+/**
+ * Decaf language Compiler
+ */
+public class Compiler
+{
+
+    public static Program generateAST(String fromSource){
+        CharStream input = CharStreams.fromString(fromSource);
+        DecafLexer lexer = new DecafLexer(input);
+        CommonTokenStream tokens = new CommonTokenStream(lexer);
+        DecafParser parser = new DecafParser(tokens);
+        DecafParser.ProgramContext tree = parser.program(); //Parsen
+        return ASTGenerator.generateAST(tree);
+    }
+
+
+}
diff --git a/src/main/java/de/maishai/ExpressionGenerator.java b/src/main/java/de/maishai/ExpressionGenerator.java
new file mode 100644
index 0000000..812416a
--- /dev/null
+++ b/src/main/java/de/maishai/ExpressionGenerator.java
@@ -0,0 +1,65 @@
+package de.maishai;
+
+import de.maishai.antlr.DecafBaseVisitor;
+import de.maishai.antlr.DecafParser;
+import de.maishai.ast.Expression;
+import de.maishai.ast.Operator;
+import de.maishai.ast.records.Binary;
+import de.maishai.ast.records.BoolConstant;
+import de.maishai.ast.records.IntConstant;
+import de.maishai.ast.records.MethodCall;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ExpressionGenerator extends DecafBaseVisitor<Expression> {
+    @Override
+    public Expression visitBinaryOperation(DecafParser.BinaryOperationContext ctx) {
+        return generateBinary(ctx);
+    }
+
+    @Override
+    public Expression visitMethodCallExpression(DecafParser.MethodCallExpressionContext ctx) {
+        String functionName = ctx.methCall().id().getText();
+        List<Expression> args = new ArrayList<>();
+        for(var expr : ctx.methCall().args().expr()){
+            Expression astExpr = expr.accept(this);
+            args.add(astExpr);
+        }
+        return new MethodCall(functionName, args);
+    }
+
+    @Override
+    public Expression visitConstant(DecafParser.ConstantContext ctx) {
+        return generateConstant(ctx.literal());
+    }
+
+    @Override
+    public Expression visitExpression(DecafParser.ExpressionContext ctx) {
+        //ParseTree for ( expr )
+        //Just pass it down to the inner expr:
+        return this.visit(ctx.expr());
+    }
+
+    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 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 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();
+    }
+}
diff --git a/src/main/java/de/maishai/StatementGenerator.java b/src/main/java/de/maishai/StatementGenerator.java
new file mode 100644
index 0000000..9a361bf
--- /dev/null
+++ b/src/main/java/de/maishai/StatementGenerator.java
@@ -0,0 +1,55 @@
+package de.maishai;
+
+import de.maishai.antlr.DecafBaseVisitor;
+import de.maishai.antlr.DecafParser;
+import de.maishai.ast.Expression;
+import de.maishai.ast.Statement;
+import de.maishai.ast.records.*;
+
+public class StatementGenerator extends DecafBaseVisitor<Statement> {
+    @Override
+    public Statement visitAssign(DecafParser.AssignContext ctx) {
+        Id id = new Id(ctx.id().getText());
+        Expression expr = new ExpressionGenerator().visit(ctx.expr());
+        return new Assignment(id, expr);
+    }
+
+    @Override
+    public Statement visitIf(DecafParser.IfContext ctx) {
+        Expression expr = new ExpressionGenerator().visit(ctx.expr());
+        Block ifBlock = new BlockGenerator().visit(ctx.block(0));
+        if(ctx.block().size() == 2){
+            Block elseBlock = new BlockGenerator().visit(ctx.block(1));
+            return new IfElse(expr, ifBlock, elseBlock);
+        }
+        return new IfElse(expr, ifBlock, null);
+    }
+
+    @Override
+    public Statement visitWhile(DecafParser.WhileContext ctx) {
+        Expression expr = new ExpressionGenerator().visit(ctx.expr());
+        Block block = new BlockGenerator().visit(ctx.block());
+        return new While(expr, block);
+    }
+
+    @Override
+    public Statement visitReturn(DecafParser.ReturnContext ctx) {
+        return new Return(new ExpressionGenerator().visit(ctx.expr()));
+    }
+
+    @Override
+    public Statement visitReturnVoid(DecafParser.ReturnVoidContext ctx) {
+        return new ReturnVoid();
+    }
+
+    @Override
+    public Statement visitBreak(DecafParser.BreakContext ctx) {
+        return new Break();
+    }
+
+    @Override
+    public Statement visitContinue(DecafParser.ContinueContext ctx) {
+        return new Continue();
+    }
+
+}
diff --git a/src/main/java/de/maishai/VariableGenerator.java b/src/main/java/de/maishai/VariableGenerator.java
new file mode 100644
index 0000000..894e7bf
--- /dev/null
+++ b/src/main/java/de/maishai/VariableGenerator.java
@@ -0,0 +1,25 @@
+package de.maishai;
+
+
+import de.maishai.antlr.DecafBaseVisitor;
+import de.maishai.antlr.DecafParser;
+import de.maishai.ast.Type;
+import de.maishai.ast.records.Variable;
+
+public class VariableGenerator extends DecafBaseVisitor<Variable> {
+
+    @Override
+    public Variable visitVar(DecafParser.VarContext ctx) {
+        return new Variable(ctx.id().getText(), getType(ctx.type()));
+    }
+
+    public static Type getType(DecafParser.TypeContext ctx){
+        if(ctx.INT() != null)
+            return Type.INT;
+        if(ctx.BOOL() != null)
+            return Type.BOOL;
+        if(ctx.CHAR() != null)
+            return Type.CHAR;
+        throw new RuntimeException();
+    }
+}
diff --git a/src/main/java/de/maishai/antlr/Decaf.interp b/src/main/java/de/maishai/antlr/Decaf.interp
new file mode 100644
index 0000000..2171e2e
--- /dev/null
+++ b/src/main/java/de/maishai/antlr/Decaf.interp
@@ -0,0 +1,96 @@
+token literal names:
+null
+'class'
+'{'
+'}'
+';'
+'='
+'('
+')'
+'static'
+'main'
+'String[] args'
+','
+'if'
+'else'
+'for'
+'while'
+'do'
+'return'
+'break'
+'continue'
+'true'
+'false'
+'public'
+'new'
+'-'
+'+'
+'*'
+'int'
+'boolean'
+'void'
+null
+null
+null
+null
+
+token symbolic names:
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+PUBLIC
+NEW
+SUB
+ADD
+MUL
+INT
+BOOL
+VOID
+CHAR
+IDENTIFIER
+NUMBER
+WS
+
+rule names:
+program
+class
+var
+returntype
+type
+meth
+mainmeth
+params
+param
+block
+stmt
+stmtexpr
+expr
+binaryOp
+methCall
+args
+literal
+boolean
+id
+
+
+atn:
+[4, 1, 33, 231, 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, 1, 0, 4, 0, 40, 8, 0, 11, 0, 12, 0, 41, 1, 1, 3, 1, 45, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 52, 8, 1, 10, 1, 12, 1, 55, 9, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 2, 69, 8, 2, 1, 3, 1, 3, 3, 3, 73, 8, 3, 1, 4, 1, 4, 1, 5, 3, 5, 78, 8, 5, 1, 5, 1, 5, 1, 5, 1, 5, 3, 5, 84, 8, 5, 1, 5, 1, 5, 1, 5, 1, 5, 3, 5, 90, 8, 5, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 7, 1, 7, 1, 7, 5, 7, 104, 8, 7, 10, 7, 12, 7, 107, 9, 7, 1, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 5, 9, 115, 8, 9, 10, 9, 12, 9, 118, 9, 9, 1, 9, 1, 9, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 3, 10, 129, 8, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 3, 10, 165, 8, 10, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 3, 11, 179, 8, 11, 1, 11, 1, 11, 3, 11, 183, 8, 11, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 194, 8, 12, 1, 12, 1, 12, 1, 12, 1, 12, 5, 12, 200, 8, 12, 10, 12, 12, 12, 203, 9, 12, 1, 13, 1, 13, 1, 14, 1, 14, 1, 14, 3, 14, 210, 8, 14, 1, 14, 1, 14, 1, 15, 1, 15, 1, 15, 5, 15, 217, 8, 15, 10, 15, 12, 15, 220, 9, 15, 1, 16, 1, 16, 1, 16, 3, 16, 225, 8, 16, 1, 17, 1, 17, 1, 18, 1, 18, 1, 18, 0, 1, 24, 19, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 0, 3, 2, 0, 27, 28, 30, 30, 1, 0, 24, 26, 1, 0, 20, 21, 244, 0, 39, 1, 0, 0, 0, 2, 44, 1, 0, 0, 0, 4, 68, 1, 0, 0, 0, 6, 72, 1, 0, 0, 0, 8, 74, 1, 0, 0, 0, 10, 89, 1, 0, 0, 0, 12, 91, 1, 0, 0, 0, 14, 100, 1, 0, 0, 0, 16, 108, 1, 0, 0, 0, 18, 111, 1, 0, 0, 0, 20, 164, 1, 0, 0, 0, 22, 182, 1, 0, 0, 0, 24, 193, 1, 0, 0, 0, 26, 204, 1, 0, 0, 0, 28, 206, 1, 0, 0, 0, 30, 213, 1, 0, 0, 0, 32, 224, 1, 0, 0, 0, 34, 226, 1, 0, 0, 0, 36, 228, 1, 0, 0, 0, 38, 40, 3, 2, 1, 0, 39, 38, 1, 0, 0, 0, 40, 41, 1, 0, 0, 0, 41, 39, 1, 0, 0, 0, 41, 42, 1, 0, 0, 0, 42, 1, 1, 0, 0, 0, 43, 45, 5, 22, 0, 0, 44, 43, 1, 0, 0, 0, 44, 45, 1, 0, 0, 0, 45, 46, 1, 0, 0, 0, 46, 47, 5, 1, 0, 0, 47, 48, 3, 36, 18, 0, 48, 53, 5, 2, 0, 0, 49, 52, 3, 4, 2, 0, 50, 52, 3, 10, 5, 0, 51, 49, 1, 0, 0, 0, 51, 50, 1, 0, 0, 0, 52, 55, 1, 0, 0, 0, 53, 51, 1, 0, 0, 0, 53, 54, 1, 0, 0, 0, 54, 56, 1, 0, 0, 0, 55, 53, 1, 0, 0, 0, 56, 57, 5, 3, 0, 0, 57, 3, 1, 0, 0, 0, 58, 59, 3, 8, 4, 0, 59, 60, 3, 36, 18, 0, 60, 61, 5, 4, 0, 0, 61, 69, 1, 0, 0, 0, 62, 63, 3, 8, 4, 0, 63, 64, 3, 36, 18, 0, 64, 65, 5, 5, 0, 0, 65, 66, 3, 24, 12, 0, 66, 67, 5, 4, 0, 0, 67, 69, 1, 0, 0, 0, 68, 58, 1, 0, 0, 0, 68, 62, 1, 0, 0, 0, 69, 5, 1, 0, 0, 0, 70, 73, 3, 8, 4, 0, 71, 73, 5, 29, 0, 0, 72, 70, 1, 0, 0, 0, 72, 71, 1, 0, 0, 0, 73, 7, 1, 0, 0, 0, 74, 75, 7, 0, 0, 0, 75, 9, 1, 0, 0, 0, 76, 78, 5, 22, 0, 0, 77, 76, 1, 0, 0, 0, 77, 78, 1, 0, 0, 0, 78, 79, 1, 0, 0, 0, 79, 80, 3, 6, 3, 0, 80, 81, 3, 36, 18, 0, 81, 83, 5, 6, 0, 0, 82, 84, 3, 14, 7, 0, 83, 82, 1, 0, 0, 0, 83, 84, 1, 0, 0, 0, 84, 85, 1, 0, 0, 0, 85, 86, 5, 7, 0, 0, 86, 87, 3, 18, 9, 0, 87, 90, 1, 0, 0, 0, 88, 90, 3, 12, 6, 0, 89, 77, 1, 0, 0, 0, 89, 88, 1, 0, 0, 0, 90, 11, 1, 0, 0, 0, 91, 92, 5, 22, 0, 0, 92, 93, 5, 8, 0, 0, 93, 94, 5, 29, 0, 0, 94, 95, 5, 9, 0, 0, 95, 96, 5, 6, 0, 0, 96, 97, 5, 10, 0, 0, 97, 98, 5, 7, 0, 0, 98, 99, 3, 18, 9, 0, 99, 13, 1, 0, 0, 0, 100, 105, 3, 16, 8, 0, 101, 102, 5, 11, 0, 0, 102, 104, 3, 16, 8, 0, 103, 101, 1, 0, 0, 0, 104, 107, 1, 0, 0, 0, 105, 103, 1, 0, 0, 0, 105, 106, 1, 0, 0, 0, 106, 15, 1, 0, 0, 0, 107, 105, 1, 0, 0, 0, 108, 109, 3, 8, 4, 0, 109, 110, 3, 36, 18, 0, 110, 17, 1, 0, 0, 0, 111, 116, 5, 2, 0, 0, 112, 115, 3, 4, 2, 0, 113, 115, 3, 20, 10, 0, 114, 112, 1, 0, 0, 0, 114, 113, 1, 0, 0, 0, 115, 118, 1, 0, 0, 0, 116, 114, 1, 0, 0, 0, 116, 117, 1, 0, 0, 0, 117, 119, 1, 0, 0, 0, 118, 116, 1, 0, 0, 0, 119, 120, 5, 3, 0, 0, 120, 19, 1, 0, 0, 0, 121, 122, 5, 12, 0, 0, 122, 123, 5, 6, 0, 0, 123, 124, 3, 24, 12, 0, 124, 125, 5, 7, 0, 0, 125, 128, 3, 18, 9, 0, 126, 127, 5, 13, 0, 0, 127, 129, 3, 18, 9, 0, 128, 126, 1, 0, 0, 0, 128, 129, 1, 0, 0, 0, 129, 165, 1, 0, 0, 0, 130, 131, 5, 14, 0, 0, 131, 132, 5, 6, 0, 0, 132, 133, 3, 24, 12, 0, 133, 134, 5, 4, 0, 0, 134, 135, 3, 24, 12, 0, 135, 136, 5, 4, 0, 0, 136, 137, 3, 24, 12, 0, 137, 138, 5, 7, 0, 0, 138, 139, 3, 18, 9, 0, 139, 165, 1, 0, 0, 0, 140, 141, 5, 15, 0, 0, 141, 142, 5, 6, 0, 0, 142, 143, 3, 24, 12, 0, 143, 144, 5, 7, 0, 0, 144, 145, 3, 18, 9, 0, 145, 165, 1, 0, 0, 0, 146, 147, 5, 16, 0, 0, 147, 148, 3, 18, 9, 0, 148, 149, 5, 15, 0, 0, 149, 150, 5, 6, 0, 0, 150, 151, 3, 24, 12, 0, 151, 152, 5, 7, 0, 0, 152, 165, 1, 0, 0, 0, 153, 154, 5, 17, 0, 0, 154, 155, 3, 24, 12, 0, 155, 156, 5, 4, 0, 0, 156, 165, 1, 0, 0, 0, 157, 158, 5, 17, 0, 0, 158, 165, 5, 4, 0, 0, 159, 160, 5, 18, 0, 0, 160, 165, 5, 4, 0, 0, 161, 162, 5, 19, 0, 0, 162, 165, 5, 4, 0, 0, 163, 165, 3, 22, 11, 0, 164, 121, 1, 0, 0, 0, 164, 130, 1, 0, 0, 0, 164, 140, 1, 0, 0, 0, 164, 146, 1, 0, 0, 0, 164, 153, 1, 0, 0, 0, 164, 157, 1, 0, 0, 0, 164, 159, 1, 0, 0, 0, 164, 161, 1, 0, 0, 0, 164, 163, 1, 0, 0, 0, 165, 21, 1, 0, 0, 0, 166, 167, 3, 36, 18, 0, 167, 168, 5, 5, 0, 0, 168, 169, 3, 24, 12, 0, 169, 170, 5, 4, 0, 0, 170, 183, 1, 0, 0, 0, 171, 172, 3, 28, 14, 0, 172, 173, 5, 4, 0, 0, 173, 183, 1, 0, 0, 0, 174, 175, 5, 23, 0, 0, 175, 176, 3, 8, 4, 0, 176, 178, 5, 6, 0, 0, 177, 179, 3, 30, 15, 0, 178, 177, 1, 0, 0, 0, 178, 179, 1, 0, 0, 0, 179, 180, 1, 0, 0, 0, 180, 181, 5, 7, 0, 0, 181, 183, 1, 0, 0, 0, 182, 166, 1, 0, 0, 0, 182, 171, 1, 0, 0, 0, 182, 174, 1, 0, 0, 0, 183, 23, 1, 0, 0, 0, 184, 185, 6, 12, -1, 0, 185, 194, 3, 32, 16, 0, 186, 187, 5, 6, 0, 0, 187, 188, 3, 24, 12, 0, 188, 189, 5, 7, 0, 0, 189, 194, 1, 0, 0, 0, 190, 194, 3, 28, 14, 0, 191, 194, 3, 36, 18, 0, 192, 194, 3, 22, 11, 0, 193, 184, 1, 0, 0, 0, 193, 186, 1, 0, 0, 0, 193, 190, 1, 0, 0, 0, 193, 191, 1, 0, 0, 0, 193, 192, 1, 0, 0, 0, 194, 201, 1, 0, 0, 0, 195, 196, 10, 6, 0, 0, 196, 197, 3, 26, 13, 0, 197, 198, 3, 24, 12, 7, 198, 200, 1, 0, 0, 0, 199, 195, 1, 0, 0, 0, 200, 203, 1, 0, 0, 0, 201, 199, 1, 0, 0, 0, 201, 202, 1, 0, 0, 0, 202, 25, 1, 0, 0, 0, 203, 201, 1, 0, 0, 0, 204, 205, 7, 1, 0, 0, 205, 27, 1, 0, 0, 0, 206, 207, 3, 36, 18, 0, 207, 209, 5, 6, 0, 0, 208, 210, 3, 30, 15, 0, 209, 208, 1, 0, 0, 0, 209, 210, 1, 0, 0, 0, 210, 211, 1, 0, 0, 0, 211, 212, 5, 7, 0, 0, 212, 29, 1, 0, 0, 0, 213, 218, 3, 24, 12, 0, 214, 215, 5, 11, 0, 0, 215, 217, 3, 24, 12, 0, 216, 214, 1, 0, 0, 0, 217, 220, 1, 0, 0, 0, 218, 216, 1, 0, 0, 0, 218, 219, 1, 0, 0, 0, 219, 31, 1, 0, 0, 0, 220, 218, 1, 0, 0, 0, 221, 225, 5, 32, 0, 0, 222, 225, 3, 34, 17, 0, 223, 225, 5, 30, 0, 0, 224, 221, 1, 0, 0, 0, 224, 222, 1, 0, 0, 0, 224, 223, 1, 0, 0, 0, 225, 33, 1, 0, 0, 0, 226, 227, 7, 2, 0, 0, 227, 35, 1, 0, 0, 0, 228, 229, 5, 31, 0, 0, 229, 37, 1, 0, 0, 0, 21, 41, 44, 51, 53, 68, 72, 77, 83, 89, 105, 114, 116, 128, 164, 178, 182, 193, 201, 209, 218, 224]
\ No newline at end of file
diff --git a/src/main/java/de/maishai/antlr/Decaf.tokens b/src/main/java/de/maishai/antlr/Decaf.tokens
new file mode 100644
index 0000000..2f81403
--- /dev/null
+++ b/src/main/java/de/maishai/antlr/Decaf.tokens
@@ -0,0 +1,62 @@
+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
+T__16=17
+T__17=18
+T__18=19
+T__19=20
+T__20=21
+PUBLIC=22
+NEW=23
+SUB=24
+ADD=25
+MUL=26
+INT=27
+BOOL=28
+VOID=29
+CHAR=30
+IDENTIFIER=31
+NUMBER=32
+WS=33
+'class'=1
+'{'=2
+'}'=3
+';'=4
+'='=5
+'('=6
+')'=7
+'static'=8
+'main'=9
+'String[] args'=10
+','=11
+'if'=12
+'else'=13
+'for'=14
+'while'=15
+'do'=16
+'return'=17
+'break'=18
+'continue'=19
+'true'=20
+'false'=21
+'public'=22
+'new'=23
+'-'=24
+'+'=25
+'*'=26
+'int'=27
+'boolean'=28
+'void'=29
diff --git a/src/main/java/de/maishai/antlr/DecafBaseListener.java b/src/main/java/de/maishai/antlr/DecafBaseListener.java
new file mode 100644
index 0000000..739b886
--- /dev/null
+++ b/src/main/java/de/maishai/antlr/DecafBaseListener.java
@@ -0,0 +1,448 @@
+// Generated from C:/dev/Compilerbau/CompilerULTIMATE/src/main/antlr/Decaf.g4 by ANTLR 4.13.1
+package de.maishai.antlr;
+
+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 enterClass(DecafParser.ClassContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitClass(DecafParser.ClassContext 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 enterReturntype(DecafParser.ReturntypeContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitReturntype(DecafParser.ReturntypeContext 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 enterMeth(DecafParser.MethContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitMeth(DecafParser.MethContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterMainmeth(DecafParser.MainmethContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitMainmeth(DecafParser.MainmethContext 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 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 enterFor(DecafParser.ForContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitFor(DecafParser.ForContext 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 enterDoWhile(DecafParser.DoWhileContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitDoWhile(DecafParser.DoWhileContext 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 enterStatementExpressionstmt(DecafParser.StatementExpressionstmtContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitStatementExpressionstmt(DecafParser.StatementExpressionstmtContext 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 enterMethodCall(DecafParser.MethodCallContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitMethodCall(DecafParser.MethodCallContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterNew(DecafParser.NewContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitNew(DecafParser.NewContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterIdentifier(DecafParser.IdentifierContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitIdentifier(DecafParser.IdentifierContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void enterMethodCallExpression(DecafParser.MethodCallExpressionContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitMethodCallExpression(DecafParser.MethodCallExpressionContext 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 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 enterStatementExpressionexpr(DecafParser.StatementExpressionexprContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitStatementExpressionexpr(DecafParser.StatementExpressionexprContext 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 enterMethCall(DecafParser.MethCallContext ctx) { }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation does nothing.</p>
+	 */
+	@Override public void exitMethCall(DecafParser.MethCallContext 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 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/maishai/antlr/DecafBaseVisitor.java b/src/main/java/de/maishai/antlr/DecafBaseVisitor.java
new file mode 100644
index 0000000..ca4ed96
--- /dev/null
+++ b/src/main/java/de/maishai/antlr/DecafBaseVisitor.java
@@ -0,0 +1,253 @@
+// Generated from C:/dev/Compilerbau/CompilerULTIMATE/src/main/antlr/Decaf.g4 by ANTLR 4.13.1
+package de.maishai.antlr;
+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 visitClass(DecafParser.ClassContext 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 visitReturntype(DecafParser.ReturntypeContext 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 visitMeth(DecafParser.MethContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitMainmeth(DecafParser.MainmethContext 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 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 visitFor(DecafParser.ForContext 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 visitDoWhile(DecafParser.DoWhileContext 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 visitStatementExpressionstmt(DecafParser.StatementExpressionstmtContext 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 visitMethodCall(DecafParser.MethodCallContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitNew(DecafParser.NewContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitIdentifier(DecafParser.IdentifierContext ctx) { return visitChildren(ctx); }
+	/**
+	 * {@inheritDoc}
+	 *
+	 * <p>The default implementation returns the result of calling
+	 * {@link #visitChildren} on {@code ctx}.</p>
+	 */
+	@Override public T visitMethodCallExpression(DecafParser.MethodCallExpressionContext 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 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 visitStatementExpressionexpr(DecafParser.StatementExpressionexprContext 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 visitMethCall(DecafParser.MethCallContext 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 visitId(DecafParser.IdContext ctx) { return visitChildren(ctx); }
+}
\ No newline at end of file
diff --git a/src/main/java/de/maishai/antlr/DecafLexer.interp b/src/main/java/de/maishai/antlr/DecafLexer.interp
new file mode 100644
index 0000000..8a2ad20
--- /dev/null
+++ b/src/main/java/de/maishai/antlr/DecafLexer.interp
@@ -0,0 +1,116 @@
+token literal names:
+null
+'class'
+'{'
+'}'
+';'
+'='
+'('
+')'
+'static'
+'main'
+'String[] args'
+','
+'if'
+'else'
+'for'
+'while'
+'do'
+'return'
+'break'
+'continue'
+'true'
+'false'
+'public'
+'new'
+'-'
+'+'
+'*'
+'int'
+'boolean'
+'void'
+null
+null
+null
+null
+
+token symbolic names:
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+null
+PUBLIC
+NEW
+SUB
+ADD
+MUL
+INT
+BOOL
+VOID
+CHAR
+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
+T__16
+T__17
+T__18
+T__19
+T__20
+PUBLIC
+NEW
+SUB
+ADD
+MUL
+INT
+BOOL
+VOID
+CHAR
+IDENTIFIER
+NUMBER
+WS
+
+channel names:
+DEFAULT_TOKEN_CHANNEL
+HIDDEN
+
+mode names:
+DEFAULT_MODE
+
+atn:
+[4, 0, 33, 219, 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, 2, 25, 7, 25, 2, 26, 7, 26, 2, 27, 7, 27, 2, 28, 7, 28, 2, 29, 7, 29, 2, 30, 7, 30, 2, 31, 7, 31, 2, 32, 7, 32, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 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, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 17, 1, 17, 1, 17, 1, 17, 1, 17, 1, 17, 1, 18, 1, 18, 1, 18, 1, 18, 1, 18, 1, 18, 1, 18, 1, 18, 1, 18, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 20, 1, 20, 1, 20, 1, 20, 1, 20, 1, 20, 1, 21, 1, 21, 1, 21, 1, 21, 1, 21, 1, 21, 1, 21, 1, 22, 1, 22, 1, 22, 1, 22, 1, 23, 1, 23, 1, 24, 1, 24, 1, 25, 1, 25, 1, 26, 1, 26, 1, 26, 1, 26, 1, 27, 1, 27, 1, 27, 1, 27, 1, 27, 1, 27, 1, 27, 1, 27, 1, 28, 1, 28, 1, 28, 1, 28, 1, 28, 1, 29, 1, 29, 1, 29, 1, 29, 1, 30, 4, 30, 207, 8, 30, 11, 30, 12, 30, 208, 1, 31, 4, 31, 212, 8, 31, 11, 31, 12, 31, 213, 1, 32, 1, 32, 1, 32, 1, 32, 0, 0, 33, 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, 51, 26, 53, 27, 55, 28, 57, 29, 59, 30, 61, 31, 63, 32, 65, 33, 1, 0, 4, 1, 0, 39, 39, 2, 0, 65, 90, 97, 122, 1, 0, 48, 57, 3, 0, 9, 10, 13, 13, 32, 32, 220, 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, 0, 51, 1, 0, 0, 0, 0, 53, 1, 0, 0, 0, 0, 55, 1, 0, 0, 0, 0, 57, 1, 0, 0, 0, 0, 59, 1, 0, 0, 0, 0, 61, 1, 0, 0, 0, 0, 63, 1, 0, 0, 0, 0, 65, 1, 0, 0, 0, 1, 67, 1, 0, 0, 0, 3, 73, 1, 0, 0, 0, 5, 75, 1, 0, 0, 0, 7, 77, 1, 0, 0, 0, 9, 79, 1, 0, 0, 0, 11, 81, 1, 0, 0, 0, 13, 83, 1, 0, 0, 0, 15, 85, 1, 0, 0, 0, 17, 92, 1, 0, 0, 0, 19, 97, 1, 0, 0, 0, 21, 111, 1, 0, 0, 0, 23, 113, 1, 0, 0, 0, 25, 116, 1, 0, 0, 0, 27, 121, 1, 0, 0, 0, 29, 125, 1, 0, 0, 0, 31, 131, 1, 0, 0, 0, 33, 134, 1, 0, 0, 0, 35, 141, 1, 0, 0, 0, 37, 147, 1, 0, 0, 0, 39, 156, 1, 0, 0, 0, 41, 161, 1, 0, 0, 0, 43, 167, 1, 0, 0, 0, 45, 174, 1, 0, 0, 0, 47, 178, 1, 0, 0, 0, 49, 180, 1, 0, 0, 0, 51, 182, 1, 0, 0, 0, 53, 184, 1, 0, 0, 0, 55, 188, 1, 0, 0, 0, 57, 196, 1, 0, 0, 0, 59, 201, 1, 0, 0, 0, 61, 206, 1, 0, 0, 0, 63, 211, 1, 0, 0, 0, 65, 215, 1, 0, 0, 0, 67, 68, 5, 99, 0, 0, 68, 69, 5, 108, 0, 0, 69, 70, 5, 97, 0, 0, 70, 71, 5, 115, 0, 0, 71, 72, 5, 115, 0, 0, 72, 2, 1, 0, 0, 0, 73, 74, 5, 123, 0, 0, 74, 4, 1, 0, 0, 0, 75, 76, 5, 125, 0, 0, 76, 6, 1, 0, 0, 0, 77, 78, 5, 59, 0, 0, 78, 8, 1, 0, 0, 0, 79, 80, 5, 61, 0, 0, 80, 10, 1, 0, 0, 0, 81, 82, 5, 40, 0, 0, 82, 12, 1, 0, 0, 0, 83, 84, 5, 41, 0, 0, 84, 14, 1, 0, 0, 0, 85, 86, 5, 115, 0, 0, 86, 87, 5, 116, 0, 0, 87, 88, 5, 97, 0, 0, 88, 89, 5, 116, 0, 0, 89, 90, 5, 105, 0, 0, 90, 91, 5, 99, 0, 0, 91, 16, 1, 0, 0, 0, 92, 93, 5, 109, 0, 0, 93, 94, 5, 97, 0, 0, 94, 95, 5, 105, 0, 0, 95, 96, 5, 110, 0, 0, 96, 18, 1, 0, 0, 0, 97, 98, 5, 83, 0, 0, 98, 99, 5, 116, 0, 0, 99, 100, 5, 114, 0, 0, 100, 101, 5, 105, 0, 0, 101, 102, 5, 110, 0, 0, 102, 103, 5, 103, 0, 0, 103, 104, 5, 91, 0, 0, 104, 105, 5, 93, 0, 0, 105, 106, 5, 32, 0, 0, 106, 107, 5, 97, 0, 0, 107, 108, 5, 114, 0, 0, 108, 109, 5, 103, 0, 0, 109, 110, 5, 115, 0, 0, 110, 20, 1, 0, 0, 0, 111, 112, 5, 44, 0, 0, 112, 22, 1, 0, 0, 0, 113, 114, 5, 105, 0, 0, 114, 115, 5, 102, 0, 0, 115, 24, 1, 0, 0, 0, 116, 117, 5, 101, 0, 0, 117, 118, 5, 108, 0, 0, 118, 119, 5, 115, 0, 0, 119, 120, 5, 101, 0, 0, 120, 26, 1, 0, 0, 0, 121, 122, 5, 102, 0, 0, 122, 123, 5, 111, 0, 0, 123, 124, 5, 114, 0, 0, 124, 28, 1, 0, 0, 0, 125, 126, 5, 119, 0, 0, 126, 127, 5, 104, 0, 0, 127, 128, 5, 105, 0, 0, 128, 129, 5, 108, 0, 0, 129, 130, 5, 101, 0, 0, 130, 30, 1, 0, 0, 0, 131, 132, 5, 100, 0, 0, 132, 133, 5, 111, 0, 0, 133, 32, 1, 0, 0, 0, 134, 135, 5, 114, 0, 0, 135, 136, 5, 101, 0, 0, 136, 137, 5, 116, 0, 0, 137, 138, 5, 117, 0, 0, 138, 139, 5, 114, 0, 0, 139, 140, 5, 110, 0, 0, 140, 34, 1, 0, 0, 0, 141, 142, 5, 98, 0, 0, 142, 143, 5, 114, 0, 0, 143, 144, 5, 101, 0, 0, 144, 145, 5, 97, 0, 0, 145, 146, 5, 107, 0, 0, 146, 36, 1, 0, 0, 0, 147, 148, 5, 99, 0, 0, 148, 149, 5, 111, 0, 0, 149, 150, 5, 110, 0, 0, 150, 151, 5, 116, 0, 0, 151, 152, 5, 105, 0, 0, 152, 153, 5, 110, 0, 0, 153, 154, 5, 117, 0, 0, 154, 155, 5, 101, 0, 0, 155, 38, 1, 0, 0, 0, 156, 157, 5, 116, 0, 0, 157, 158, 5, 114, 0, 0, 158, 159, 5, 117, 0, 0, 159, 160, 5, 101, 0, 0, 160, 40, 1, 0, 0, 0, 161, 162, 5, 102, 0, 0, 162, 163, 5, 97, 0, 0, 163, 164, 5, 108, 0, 0, 164, 165, 5, 115, 0, 0, 165, 166, 5, 101, 0, 0, 166, 42, 1, 0, 0, 0, 167, 168, 5, 112, 0, 0, 168, 169, 5, 117, 0, 0, 169, 170, 5, 98, 0, 0, 170, 171, 5, 108, 0, 0, 171, 172, 5, 105, 0, 0, 172, 173, 5, 99, 0, 0, 173, 44, 1, 0, 0, 0, 174, 175, 5, 110, 0, 0, 175, 176, 5, 101, 0, 0, 176, 177, 5, 119, 0, 0, 177, 46, 1, 0, 0, 0, 178, 179, 5, 45, 0, 0, 179, 48, 1, 0, 0, 0, 180, 181, 5, 43, 0, 0, 181, 50, 1, 0, 0, 0, 182, 183, 5, 42, 0, 0, 183, 52, 1, 0, 0, 0, 184, 185, 5, 105, 0, 0, 185, 186, 5, 110, 0, 0, 186, 187, 5, 116, 0, 0, 187, 54, 1, 0, 0, 0, 188, 189, 5, 98, 0, 0, 189, 190, 5, 111, 0, 0, 190, 191, 5, 111, 0, 0, 191, 192, 5, 108, 0, 0, 192, 193, 5, 101, 0, 0, 193, 194, 5, 97, 0, 0, 194, 195, 5, 110, 0, 0, 195, 56, 1, 0, 0, 0, 196, 197, 5, 118, 0, 0, 197, 198, 5, 111, 0, 0, 198, 199, 5, 105, 0, 0, 199, 200, 5, 100, 0, 0, 200, 58, 1, 0, 0, 0, 201, 202, 7, 0, 0, 0, 202, 203, 7, 1, 0, 0, 203, 204, 7, 0, 0, 0, 204, 60, 1, 0, 0, 0, 205, 207, 7, 1, 0, 0, 206, 205, 1, 0, 0, 0, 207, 208, 1, 0, 0, 0, 208, 206, 1, 0, 0, 0, 208, 209, 1, 0, 0, 0, 209, 62, 1, 0, 0, 0, 210, 212, 7, 2, 0, 0, 211, 210, 1, 0, 0, 0, 212, 213, 1, 0, 0, 0, 213, 211, 1, 0, 0, 0, 213, 214, 1, 0, 0, 0, 214, 64, 1, 0, 0, 0, 215, 216, 7, 3, 0, 0, 216, 217, 1, 0, 0, 0, 217, 218, 6, 32, 0, 0, 218, 66, 1, 0, 0, 0, 3, 0, 208, 213, 1, 6, 0, 0]
\ No newline at end of file
diff --git a/src/main/java/de/maishai/antlr/DecafLexer.java b/src/main/java/de/maishai/antlr/DecafLexer.java
new file mode 100644
index 0000000..05dfaa1
--- /dev/null
+++ b/src/main/java/de/maishai/antlr/DecafLexer.java
@@ -0,0 +1,257 @@
+// Generated from C:/dev/Compilerbau/CompilerULTIMATE/src/main/antlr/Decaf.g4 by ANTLR 4.13.1
+package de.maishai.antlr;
+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, T__16=17, 
+		T__17=18, T__18=19, T__19=20, T__20=21, PUBLIC=22, NEW=23, SUB=24, ADD=25, 
+		MUL=26, INT=27, BOOL=28, VOID=29, CHAR=30, IDENTIFIER=31, NUMBER=32, WS=33;
+	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", "T__16", 
+			"T__17", "T__18", "T__19", "T__20", "PUBLIC", "NEW", "SUB", "ADD", "MUL", 
+			"INT", "BOOL", "VOID", "CHAR", "IDENTIFIER", "NUMBER", "WS"
+		};
+	}
+	public static final String[] ruleNames = makeRuleNames();
+
+	private static String[] makeLiteralNames() {
+		return new String[] {
+			null, "'class'", "'{'", "'}'", "';'", "'='", "'('", "')'", "'static'", 
+			"'main'", "'String[] args'", "','", "'if'", "'else'", "'for'", "'while'", 
+			"'do'", "'return'", "'break'", "'continue'", "'true'", "'false'", "'public'", 
+			"'new'", "'-'", "'+'", "'*'", "'int'", "'boolean'", "'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, null, null, null, null, null, "PUBLIC", 
+			"NEW", "SUB", "ADD", "MUL", "INT", "BOOL", "VOID", "CHAR", "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!\u00db\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\u0002\u0019\u0007\u0019\u0002\u001a\u0007\u001a\u0002"+
+		"\u001b\u0007\u001b\u0002\u001c\u0007\u001c\u0002\u001d\u0007\u001d\u0002"+
+		"\u001e\u0007\u001e\u0002\u001f\u0007\u001f\u0002 \u0007 \u0001\u0000\u0001"+
+		"\u0000\u0001\u0000\u0001\u0000\u0001\u0000\u0001\u0000\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\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001\u0007\u0001"+
+		"\b\u0001\b\u0001\b\u0001\b\u0001\b\u0001\t\u0001\t\u0001\t\u0001\t\u0001"+
+		"\t\u0001\t\u0001\t\u0001\t\u0001\t\u0001\t\u0001\t\u0001\t\u0001\t\u0001"+
+		"\t\u0001\n\u0001\n\u0001\u000b\u0001\u000b\u0001\u000b\u0001\f\u0001\f"+
+		"\u0001\f\u0001\f\u0001\f\u0001\r\u0001\r\u0001\r\u0001\r\u0001\u000e\u0001"+
+		"\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000e\u0001\u000f\u0001"+
+		"\u000f\u0001\u000f\u0001\u0010\u0001\u0010\u0001\u0010\u0001\u0010\u0001"+
+		"\u0010\u0001\u0010\u0001\u0010\u0001\u0011\u0001\u0011\u0001\u0011\u0001"+
+		"\u0011\u0001\u0011\u0001\u0011\u0001\u0012\u0001\u0012\u0001\u0012\u0001"+
+		"\u0012\u0001\u0012\u0001\u0012\u0001\u0012\u0001\u0012\u0001\u0012\u0001"+
+		"\u0013\u0001\u0013\u0001\u0013\u0001\u0013\u0001\u0013\u0001\u0014\u0001"+
+		"\u0014\u0001\u0014\u0001\u0014\u0001\u0014\u0001\u0014\u0001\u0015\u0001"+
+		"\u0015\u0001\u0015\u0001\u0015\u0001\u0015\u0001\u0015\u0001\u0015\u0001"+
+		"\u0016\u0001\u0016\u0001\u0016\u0001\u0016\u0001\u0017\u0001\u0017\u0001"+
+		"\u0018\u0001\u0018\u0001\u0019\u0001\u0019\u0001\u001a\u0001\u001a\u0001"+
+		"\u001a\u0001\u001a\u0001\u001b\u0001\u001b\u0001\u001b\u0001\u001b\u0001"+
+		"\u001b\u0001\u001b\u0001\u001b\u0001\u001b\u0001\u001c\u0001\u001c\u0001"+
+		"\u001c\u0001\u001c\u0001\u001c\u0001\u001d\u0001\u001d\u0001\u001d\u0001"+
+		"\u001d\u0001\u001e\u0004\u001e\u00cf\b\u001e\u000b\u001e\f\u001e\u00d0"+
+		"\u0001\u001f\u0004\u001f\u00d4\b\u001f\u000b\u001f\f\u001f\u00d5\u0001"+
+		" \u0001 \u0001 \u0001 \u0000\u0000!\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\u00193\u001a5\u001b7\u001c"+
+		"9\u001d;\u001e=\u001f? A!\u0001\u0000\u0004\u0001\u0000\'\'\u0002\u0000"+
+		"AZaz\u0001\u000009\u0003\u0000\t\n\r\r  \u00dc\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\u0000"+
+		"1\u0001\u0000\u0000\u0000\u00003\u0001\u0000\u0000\u0000\u00005\u0001"+
+		"\u0000\u0000\u0000\u00007\u0001\u0000\u0000\u0000\u00009\u0001\u0000\u0000"+
+		"\u0000\u0000;\u0001\u0000\u0000\u0000\u0000=\u0001\u0000\u0000\u0000\u0000"+
+		"?\u0001\u0000\u0000\u0000\u0000A\u0001\u0000\u0000\u0000\u0001C\u0001"+
+		"\u0000\u0000\u0000\u0003I\u0001\u0000\u0000\u0000\u0005K\u0001\u0000\u0000"+
+		"\u0000\u0007M\u0001\u0000\u0000\u0000\tO\u0001\u0000\u0000\u0000\u000b"+
+		"Q\u0001\u0000\u0000\u0000\rS\u0001\u0000\u0000\u0000\u000fU\u0001\u0000"+
+		"\u0000\u0000\u0011\\\u0001\u0000\u0000\u0000\u0013a\u0001\u0000\u0000"+
+		"\u0000\u0015o\u0001\u0000\u0000\u0000\u0017q\u0001\u0000\u0000\u0000\u0019"+
+		"t\u0001\u0000\u0000\u0000\u001by\u0001\u0000\u0000\u0000\u001d}\u0001"+
+		"\u0000\u0000\u0000\u001f\u0083\u0001\u0000\u0000\u0000!\u0086\u0001\u0000"+
+		"\u0000\u0000#\u008d\u0001\u0000\u0000\u0000%\u0093\u0001\u0000\u0000\u0000"+
+		"\'\u009c\u0001\u0000\u0000\u0000)\u00a1\u0001\u0000\u0000\u0000+\u00a7"+
+		"\u0001\u0000\u0000\u0000-\u00ae\u0001\u0000\u0000\u0000/\u00b2\u0001\u0000"+
+		"\u0000\u00001\u00b4\u0001\u0000\u0000\u00003\u00b6\u0001\u0000\u0000\u0000"+
+		"5\u00b8\u0001\u0000\u0000\u00007\u00bc\u0001\u0000\u0000\u00009\u00c4"+
+		"\u0001\u0000\u0000\u0000;\u00c9\u0001\u0000\u0000\u0000=\u00ce\u0001\u0000"+
+		"\u0000\u0000?\u00d3\u0001\u0000\u0000\u0000A\u00d7\u0001\u0000\u0000\u0000"+
+		"CD\u0005c\u0000\u0000DE\u0005l\u0000\u0000EF\u0005a\u0000\u0000FG\u0005"+
+		"s\u0000\u0000GH\u0005s\u0000\u0000H\u0002\u0001\u0000\u0000\u0000IJ\u0005"+
+		"{\u0000\u0000J\u0004\u0001\u0000\u0000\u0000KL\u0005}\u0000\u0000L\u0006"+
+		"\u0001\u0000\u0000\u0000MN\u0005;\u0000\u0000N\b\u0001\u0000\u0000\u0000"+
+		"OP\u0005=\u0000\u0000P\n\u0001\u0000\u0000\u0000QR\u0005(\u0000\u0000"+
+		"R\f\u0001\u0000\u0000\u0000ST\u0005)\u0000\u0000T\u000e\u0001\u0000\u0000"+
+		"\u0000UV\u0005s\u0000\u0000VW\u0005t\u0000\u0000WX\u0005a\u0000\u0000"+
+		"XY\u0005t\u0000\u0000YZ\u0005i\u0000\u0000Z[\u0005c\u0000\u0000[\u0010"+
+		"\u0001\u0000\u0000\u0000\\]\u0005m\u0000\u0000]^\u0005a\u0000\u0000^_"+
+		"\u0005i\u0000\u0000_`\u0005n\u0000\u0000`\u0012\u0001\u0000\u0000\u0000"+
+		"ab\u0005S\u0000\u0000bc\u0005t\u0000\u0000cd\u0005r\u0000\u0000de\u0005"+
+		"i\u0000\u0000ef\u0005n\u0000\u0000fg\u0005g\u0000\u0000gh\u0005[\u0000"+
+		"\u0000hi\u0005]\u0000\u0000ij\u0005 \u0000\u0000jk\u0005a\u0000\u0000"+
+		"kl\u0005r\u0000\u0000lm\u0005g\u0000\u0000mn\u0005s\u0000\u0000n\u0014"+
+		"\u0001\u0000\u0000\u0000op\u0005,\u0000\u0000p\u0016\u0001\u0000\u0000"+
+		"\u0000qr\u0005i\u0000\u0000rs\u0005f\u0000\u0000s\u0018\u0001\u0000\u0000"+
+		"\u0000tu\u0005e\u0000\u0000uv\u0005l\u0000\u0000vw\u0005s\u0000\u0000"+
+		"wx\u0005e\u0000\u0000x\u001a\u0001\u0000\u0000\u0000yz\u0005f\u0000\u0000"+
+		"z{\u0005o\u0000\u0000{|\u0005r\u0000\u0000|\u001c\u0001\u0000\u0000\u0000"+
+		"}~\u0005w\u0000\u0000~\u007f\u0005h\u0000\u0000\u007f\u0080\u0005i\u0000"+
+		"\u0000\u0080\u0081\u0005l\u0000\u0000\u0081\u0082\u0005e\u0000\u0000\u0082"+
+		"\u001e\u0001\u0000\u0000\u0000\u0083\u0084\u0005d\u0000\u0000\u0084\u0085"+
+		"\u0005o\u0000\u0000\u0085 \u0001\u0000\u0000\u0000\u0086\u0087\u0005r"+
+		"\u0000\u0000\u0087\u0088\u0005e\u0000\u0000\u0088\u0089\u0005t\u0000\u0000"+
+		"\u0089\u008a\u0005u\u0000\u0000\u008a\u008b\u0005r\u0000\u0000\u008b\u008c"+
+		"\u0005n\u0000\u0000\u008c\"\u0001\u0000\u0000\u0000\u008d\u008e\u0005"+
+		"b\u0000\u0000\u008e\u008f\u0005r\u0000\u0000\u008f\u0090\u0005e\u0000"+
+		"\u0000\u0090\u0091\u0005a\u0000\u0000\u0091\u0092\u0005k\u0000\u0000\u0092"+
+		"$\u0001\u0000\u0000\u0000\u0093\u0094\u0005c\u0000\u0000\u0094\u0095\u0005"+
+		"o\u0000\u0000\u0095\u0096\u0005n\u0000\u0000\u0096\u0097\u0005t\u0000"+
+		"\u0000\u0097\u0098\u0005i\u0000\u0000\u0098\u0099\u0005n\u0000\u0000\u0099"+
+		"\u009a\u0005u\u0000\u0000\u009a\u009b\u0005e\u0000\u0000\u009b&\u0001"+
+		"\u0000\u0000\u0000\u009c\u009d\u0005t\u0000\u0000\u009d\u009e\u0005r\u0000"+
+		"\u0000\u009e\u009f\u0005u\u0000\u0000\u009f\u00a0\u0005e\u0000\u0000\u00a0"+
+		"(\u0001\u0000\u0000\u0000\u00a1\u00a2\u0005f\u0000\u0000\u00a2\u00a3\u0005"+
+		"a\u0000\u0000\u00a3\u00a4\u0005l\u0000\u0000\u00a4\u00a5\u0005s\u0000"+
+		"\u0000\u00a5\u00a6\u0005e\u0000\u0000\u00a6*\u0001\u0000\u0000\u0000\u00a7"+
+		"\u00a8\u0005p\u0000\u0000\u00a8\u00a9\u0005u\u0000\u0000\u00a9\u00aa\u0005"+
+		"b\u0000\u0000\u00aa\u00ab\u0005l\u0000\u0000\u00ab\u00ac\u0005i\u0000"+
+		"\u0000\u00ac\u00ad\u0005c\u0000\u0000\u00ad,\u0001\u0000\u0000\u0000\u00ae"+
+		"\u00af\u0005n\u0000\u0000\u00af\u00b0\u0005e\u0000\u0000\u00b0\u00b1\u0005"+
+		"w\u0000\u0000\u00b1.\u0001\u0000\u0000\u0000\u00b2\u00b3\u0005-\u0000"+
+		"\u0000\u00b30\u0001\u0000\u0000\u0000\u00b4\u00b5\u0005+\u0000\u0000\u00b5"+
+		"2\u0001\u0000\u0000\u0000\u00b6\u00b7\u0005*\u0000\u0000\u00b74\u0001"+
+		"\u0000\u0000\u0000\u00b8\u00b9\u0005i\u0000\u0000\u00b9\u00ba\u0005n\u0000"+
+		"\u0000\u00ba\u00bb\u0005t\u0000\u0000\u00bb6\u0001\u0000\u0000\u0000\u00bc"+
+		"\u00bd\u0005b\u0000\u0000\u00bd\u00be\u0005o\u0000\u0000\u00be\u00bf\u0005"+
+		"o\u0000\u0000\u00bf\u00c0\u0005l\u0000\u0000\u00c0\u00c1\u0005e\u0000"+
+		"\u0000\u00c1\u00c2\u0005a\u0000\u0000\u00c2\u00c3\u0005n\u0000\u0000\u00c3"+
+		"8\u0001\u0000\u0000\u0000\u00c4\u00c5\u0005v\u0000\u0000\u00c5\u00c6\u0005"+
+		"o\u0000\u0000\u00c6\u00c7\u0005i\u0000\u0000\u00c7\u00c8\u0005d\u0000"+
+		"\u0000\u00c8:\u0001\u0000\u0000\u0000\u00c9\u00ca\u0007\u0000\u0000\u0000"+
+		"\u00ca\u00cb\u0007\u0001\u0000\u0000\u00cb\u00cc\u0007\u0000\u0000\u0000"+
+		"\u00cc<\u0001\u0000\u0000\u0000\u00cd\u00cf\u0007\u0001\u0000\u0000\u00ce"+
+		"\u00cd\u0001\u0000\u0000\u0000\u00cf\u00d0\u0001\u0000\u0000\u0000\u00d0"+
+		"\u00ce\u0001\u0000\u0000\u0000\u00d0\u00d1\u0001\u0000\u0000\u0000\u00d1"+
+		">\u0001\u0000\u0000\u0000\u00d2\u00d4\u0007\u0002\u0000\u0000\u00d3\u00d2"+
+		"\u0001\u0000\u0000\u0000\u00d4\u00d5\u0001\u0000\u0000\u0000\u00d5\u00d3"+
+		"\u0001\u0000\u0000\u0000\u00d5\u00d6\u0001\u0000\u0000\u0000\u00d6@\u0001"+
+		"\u0000\u0000\u0000\u00d7\u00d8\u0007\u0003\u0000\u0000\u00d8\u00d9\u0001"+
+		"\u0000\u0000\u0000\u00d9\u00da\u0006 \u0000\u0000\u00daB\u0001\u0000\u0000"+
+		"\u0000\u0003\u0000\u00d0\u00d5\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/maishai/antlr/DecafLexer.tokens b/src/main/java/de/maishai/antlr/DecafLexer.tokens
new file mode 100644
index 0000000..2f81403
--- /dev/null
+++ b/src/main/java/de/maishai/antlr/DecafLexer.tokens
@@ -0,0 +1,62 @@
+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
+T__16=17
+T__17=18
+T__18=19
+T__19=20
+T__20=21
+PUBLIC=22
+NEW=23
+SUB=24
+ADD=25
+MUL=26
+INT=27
+BOOL=28
+VOID=29
+CHAR=30
+IDENTIFIER=31
+NUMBER=32
+WS=33
+'class'=1
+'{'=2
+'}'=3
+';'=4
+'='=5
+'('=6
+')'=7
+'static'=8
+'main'=9
+'String[] args'=10
+','=11
+'if'=12
+'else'=13
+'for'=14
+'while'=15
+'do'=16
+'return'=17
+'break'=18
+'continue'=19
+'true'=20
+'false'=21
+'public'=22
+'new'=23
+'-'=24
+'+'=25
+'*'=26
+'int'=27
+'boolean'=28
+'void'=29
diff --git a/src/main/java/de/maishai/antlr/DecafListener.java b/src/main/java/de/maishai/antlr/DecafListener.java
new file mode 100644
index 0000000..e6a6fed
--- /dev/null
+++ b/src/main/java/de/maishai/antlr/DecafListener.java
@@ -0,0 +1,386 @@
+// Generated from C:/dev/Compilerbau/CompilerULTIMATE/src/main/antlr/Decaf.g4 by ANTLR 4.13.1
+package de.maishai.antlr;
+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#class}.
+	 * @param ctx the parse tree
+	 */
+	void enterClass(DecafParser.ClassContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#class}.
+	 * @param ctx the parse tree
+	 */
+	void exitClass(DecafParser.ClassContext 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#returntype}.
+	 * @param ctx the parse tree
+	 */
+	void enterReturntype(DecafParser.ReturntypeContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#returntype}.
+	 * @param ctx the parse tree
+	 */
+	void exitReturntype(DecafParser.ReturntypeContext 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#meth}.
+	 * @param ctx the parse tree
+	 */
+	void enterMeth(DecafParser.MethContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#meth}.
+	 * @param ctx the parse tree
+	 */
+	void exitMeth(DecafParser.MethContext ctx);
+	/**
+	 * Enter a parse tree produced by {@link DecafParser#mainmeth}.
+	 * @param ctx the parse tree
+	 */
+	void enterMainmeth(DecafParser.MainmethContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#mainmeth}.
+	 * @param ctx the parse tree
+	 */
+	void exitMainmeth(DecafParser.MainmethContext 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 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 For}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterFor(DecafParser.ForContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code For}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitFor(DecafParser.ForContext 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 DoWhile}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterDoWhile(DecafParser.DoWhileContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code DoWhile}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitDoWhile(DecafParser.DoWhileContext 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 StatementExpressionstmt}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void enterStatementExpressionstmt(DecafParser.StatementExpressionstmtContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code StatementExpressionstmt}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 */
+	void exitStatementExpressionstmt(DecafParser.StatementExpressionstmtContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Assign}
+	 * labeled alternative in {@link DecafParser#stmtexpr}.
+	 * @param ctx the parse tree
+	 */
+	void enterAssign(DecafParser.AssignContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Assign}
+	 * labeled alternative in {@link DecafParser#stmtexpr}.
+	 * @param ctx the parse tree
+	 */
+	void exitAssign(DecafParser.AssignContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code MethodCall}
+	 * labeled alternative in {@link DecafParser#stmtexpr}.
+	 * @param ctx the parse tree
+	 */
+	void enterMethodCall(DecafParser.MethodCallContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code MethodCall}
+	 * labeled alternative in {@link DecafParser#stmtexpr}.
+	 * @param ctx the parse tree
+	 */
+	void exitMethodCall(DecafParser.MethodCallContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code New}
+	 * labeled alternative in {@link DecafParser#stmtexpr}.
+	 * @param ctx the parse tree
+	 */
+	void enterNew(DecafParser.NewContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code New}
+	 * labeled alternative in {@link DecafParser#stmtexpr}.
+	 * @param ctx the parse tree
+	 */
+	void exitNew(DecafParser.NewContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code Identifier}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterIdentifier(DecafParser.IdentifierContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code Identifier}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitIdentifier(DecafParser.IdentifierContext ctx);
+	/**
+	 * Enter a parse tree produced by the {@code MethodCallExpression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterMethodCallExpression(DecafParser.MethodCallExpressionContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code MethodCallExpression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitMethodCallExpression(DecafParser.MethodCallExpressionContext 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 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 StatementExpressionexpr}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void enterStatementExpressionexpr(DecafParser.StatementExpressionexprContext ctx);
+	/**
+	 * Exit a parse tree produced by the {@code StatementExpressionexpr}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 */
+	void exitStatementExpressionexpr(DecafParser.StatementExpressionexprContext 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#methCall}.
+	 * @param ctx the parse tree
+	 */
+	void enterMethCall(DecafParser.MethCallContext ctx);
+	/**
+	 * Exit a parse tree produced by {@link DecafParser#methCall}.
+	 * @param ctx the parse tree
+	 */
+	void exitMethCall(DecafParser.MethCallContext 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#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/maishai/antlr/DecafParser.java b/src/main/java/de/maishai/antlr/DecafParser.java
new file mode 100644
index 0000000..37e0da2
--- /dev/null
+++ b/src/main/java/de/maishai/antlr/DecafParser.java
@@ -0,0 +1,2099 @@
+// Generated from C:/dev/Compilerbau/CompilerULTIMATE/src/main/antlr/Decaf.g4 by ANTLR 4.13.1
+package de.maishai.antlr;
+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, T__16=17, 
+		T__17=18, T__18=19, T__19=20, T__20=21, PUBLIC=22, NEW=23, SUB=24, ADD=25, 
+		MUL=26, INT=27, BOOL=28, VOID=29, CHAR=30, IDENTIFIER=31, NUMBER=32, WS=33;
+	public static final int
+		RULE_program = 0, RULE_class = 1, RULE_var = 2, RULE_returntype = 3, RULE_type = 4, 
+		RULE_meth = 5, RULE_mainmeth = 6, RULE_params = 7, RULE_param = 8, RULE_block = 9, 
+		RULE_stmt = 10, RULE_stmtexpr = 11, RULE_expr = 12, RULE_binaryOp = 13, 
+		RULE_methCall = 14, RULE_args = 15, RULE_literal = 16, RULE_boolean = 17, 
+		RULE_id = 18;
+	private static String[] makeRuleNames() {
+		return new String[] {
+			"program", "class", "var", "returntype", "type", "meth", "mainmeth", 
+			"params", "param", "block", "stmt", "stmtexpr", "expr", "binaryOp", "methCall", 
+			"args", "literal", "boolean", "id"
+		};
+	}
+	public static final String[] ruleNames = makeRuleNames();
+
+	private static String[] makeLiteralNames() {
+		return new String[] {
+			null, "'class'", "'{'", "'}'", "';'", "'='", "'('", "')'", "'static'", 
+			"'main'", "'String[] args'", "','", "'if'", "'else'", "'for'", "'while'", 
+			"'do'", "'return'", "'break'", "'continue'", "'true'", "'false'", "'public'", 
+			"'new'", "'-'", "'+'", "'*'", "'int'", "'boolean'", "'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, null, null, null, null, null, "PUBLIC", 
+			"NEW", "SUB", "ADD", "MUL", "INT", "BOOL", "VOID", "CHAR", "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<ClassContext> class_() {
+			return getRuleContexts(ClassContext.class);
+		}
+		public ClassContext class_(int i) {
+			return getRuleContext(ClassContext.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(39); 
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			do {
+				{
+				{
+				setState(38);
+				class_();
+				}
+				}
+				setState(41); 
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			} while ( _la==T__0 || _la==PUBLIC );
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class ClassContext extends ParserRuleContext {
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public TerminalNode PUBLIC() { return getToken(DecafParser.PUBLIC, 0); }
+		public List<VarContext> var() {
+			return getRuleContexts(VarContext.class);
+		}
+		public VarContext var(int i) {
+			return getRuleContext(VarContext.class,i);
+		}
+		public List<MethContext> meth() {
+			return getRuleContexts(MethContext.class);
+		}
+		public MethContext meth(int i) {
+			return getRuleContext(MethContext.class,i);
+		}
+		public ClassContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_class; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterClass(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitClass(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitClass(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ClassContext class_() throws RecognitionException {
+		ClassContext _localctx = new ClassContext(_ctx, getState());
+		enterRule(_localctx, 2, RULE_class);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(44);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			if (_la==PUBLIC) {
+				{
+				setState(43);
+				match(PUBLIC);
+				}
+			}
+
+			setState(46);
+			match(T__0);
+			setState(47);
+			id();
+			setState(48);
+			match(T__1);
+			setState(53);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while ((((_la) & ~0x3f) == 0 && ((1L << _la) & 2017460224L) != 0)) {
+				{
+				setState(51);
+				_errHandler.sync(this);
+				switch ( getInterpreter().adaptivePredict(_input,2,_ctx) ) {
+				case 1:
+					{
+					setState(49);
+					var();
+					}
+					break;
+				case 2:
+					{
+					setState(50);
+					meth();
+					}
+					break;
+				}
+				}
+				setState(55);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			setState(56);
+			match(T__2);
+			}
+		}
+		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 ExprContext expr() {
+			return getRuleContext(ExprContext.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, 4, RULE_var);
+		try {
+			setState(68);
+			_errHandler.sync(this);
+			switch ( getInterpreter().adaptivePredict(_input,4,_ctx) ) {
+			case 1:
+				enterOuterAlt(_localctx, 1);
+				{
+				setState(58);
+				type();
+				setState(59);
+				id();
+				setState(60);
+				match(T__3);
+				}
+				break;
+			case 2:
+				enterOuterAlt(_localctx, 2);
+				{
+				setState(62);
+				type();
+				setState(63);
+				id();
+				setState(64);
+				match(T__4);
+				setState(65);
+				expr(0);
+				setState(66);
+				match(T__3);
+				}
+				break;
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class ReturntypeContext extends ParserRuleContext {
+		public TypeContext type() {
+			return getRuleContext(TypeContext.class,0);
+		}
+		public TerminalNode VOID() { return getToken(DecafParser.VOID, 0); }
+		public ReturntypeContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_returntype; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterReturntype(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitReturntype(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitReturntype(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final ReturntypeContext returntype() throws RecognitionException {
+		ReturntypeContext _localctx = new ReturntypeContext(_ctx, getState());
+		enterRule(_localctx, 6, RULE_returntype);
+		try {
+			setState(72);
+			_errHandler.sync(this);
+			switch (_input.LA(1)) {
+			case INT:
+			case BOOL:
+			case CHAR:
+				enterOuterAlt(_localctx, 1);
+				{
+				setState(70);
+				type();
+				}
+				break;
+			case VOID:
+				enterOuterAlt(_localctx, 2);
+				{
+				setState(71);
+				match(VOID);
+				}
+				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 TypeContext extends ParserRuleContext {
+		public TerminalNode INT() { return getToken(DecafParser.INT, 0); }
+		public TerminalNode BOOL() { return getToken(DecafParser.BOOL, 0); }
+		public TerminalNode CHAR() { return getToken(DecafParser.CHAR, 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, 8, RULE_type);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(74);
+			_la = _input.LA(1);
+			if ( !((((_la) & ~0x3f) == 0 && ((1L << _la) & 1476395008L) != 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 MethContext extends ParserRuleContext {
+		public ReturntypeContext returntype() {
+			return getRuleContext(ReturntypeContext.class,0);
+		}
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public BlockContext block() {
+			return getRuleContext(BlockContext.class,0);
+		}
+		public TerminalNode PUBLIC() { return getToken(DecafParser.PUBLIC, 0); }
+		public ParamsContext params() {
+			return getRuleContext(ParamsContext.class,0);
+		}
+		public MainmethContext mainmeth() {
+			return getRuleContext(MainmethContext.class,0);
+		}
+		public MethContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_meth; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterMeth(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitMeth(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitMeth(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final MethContext meth() throws RecognitionException {
+		MethContext _localctx = new MethContext(_ctx, getState());
+		enterRule(_localctx, 10, RULE_meth);
+		int _la;
+		try {
+			setState(89);
+			_errHandler.sync(this);
+			switch ( getInterpreter().adaptivePredict(_input,8,_ctx) ) {
+			case 1:
+				enterOuterAlt(_localctx, 1);
+				{
+				setState(77);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+				if (_la==PUBLIC) {
+					{
+					setState(76);
+					match(PUBLIC);
+					}
+				}
+
+				setState(79);
+				returntype();
+				setState(80);
+				id();
+				setState(81);
+				match(T__5);
+				setState(83);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+				if ((((_la) & ~0x3f) == 0 && ((1L << _la) & 1476395008L) != 0)) {
+					{
+					setState(82);
+					params();
+					}
+				}
+
+				setState(85);
+				match(T__6);
+				setState(86);
+				block();
+				}
+				break;
+			case 2:
+				enterOuterAlt(_localctx, 2);
+				{
+				setState(88);
+				mainmeth();
+				}
+				break;
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class MainmethContext extends ParserRuleContext {
+		public TerminalNode PUBLIC() { return getToken(DecafParser.PUBLIC, 0); }
+		public TerminalNode VOID() { return getToken(DecafParser.VOID, 0); }
+		public BlockContext block() {
+			return getRuleContext(BlockContext.class,0);
+		}
+		public MainmethContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_mainmeth; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterMainmeth(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitMainmeth(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitMainmeth(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final MainmethContext mainmeth() throws RecognitionException {
+		MainmethContext _localctx = new MainmethContext(_ctx, getState());
+		enterRule(_localctx, 12, RULE_mainmeth);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(91);
+			match(PUBLIC);
+			setState(92);
+			match(T__7);
+			setState(93);
+			match(VOID);
+			setState(94);
+			match(T__8);
+			setState(95);
+			match(T__5);
+			setState(96);
+			match(T__9);
+			setState(97);
+			match(T__6);
+			setState(98);
+			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, 14, RULE_params);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(100);
+			param();
+			setState(105);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while (_la==T__10) {
+				{
+				{
+				setState(101);
+				match(T__10);
+				setState(102);
+				param();
+				}
+				}
+				setState(107);
+				_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, 16, RULE_param);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(108);
+			type();
+			setState(109);
+			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, 18, RULE_block);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(111);
+			match(T__1);
+			setState(116);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while ((((_la) & ~0x3f) == 0 && ((1L << _la) & 3633303552L) != 0)) {
+				{
+				setState(114);
+				_errHandler.sync(this);
+				switch (_input.LA(1)) {
+				case INT:
+				case BOOL:
+				case CHAR:
+					{
+					setState(112);
+					var();
+					}
+					break;
+				case T__11:
+				case T__13:
+				case T__14:
+				case T__15:
+				case T__16:
+				case T__17:
+				case T__18:
+				case NEW:
+				case IDENTIFIER:
+					{
+					setState(113);
+					stmt();
+					}
+					break;
+				default:
+					throw new NoViableAltException(this);
+				}
+				}
+				setState(118);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+			}
+			setState(119);
+			match(T__2);
+			}
+		}
+		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 StatementExpressionstmtContext extends StmtContext {
+		public StmtexprContext stmtexpr() {
+			return getRuleContext(StmtexprContext.class,0);
+		}
+		public StatementExpressionstmtContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterStatementExpressionstmt(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitStatementExpressionstmt(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitStatementExpressionstmt(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class ForContext extends StmtContext {
+		public List<ExprContext> expr() {
+			return getRuleContexts(ExprContext.class);
+		}
+		public ExprContext expr(int i) {
+			return getRuleContext(ExprContext.class,i);
+		}
+		public BlockContext block() {
+			return getRuleContext(BlockContext.class,0);
+		}
+		public ForContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterFor(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitFor(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitFor(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 DoWhileContext extends StmtContext {
+		public BlockContext block() {
+			return getRuleContext(BlockContext.class,0);
+		}
+		public ExprContext expr() {
+			return getRuleContext(ExprContext.class,0);
+		}
+		public DoWhileContext(StmtContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterDoWhile(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitDoWhile(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitDoWhile(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, 20, RULE_stmt);
+		int _la;
+		try {
+			setState(164);
+			_errHandler.sync(this);
+			switch ( getInterpreter().adaptivePredict(_input,13,_ctx) ) {
+			case 1:
+				_localctx = new IfContext(_localctx);
+				enterOuterAlt(_localctx, 1);
+				{
+				setState(121);
+				match(T__11);
+				setState(122);
+				match(T__5);
+				setState(123);
+				expr(0);
+				setState(124);
+				match(T__6);
+				setState(125);
+				block();
+				setState(128);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+				if (_la==T__12) {
+					{
+					setState(126);
+					match(T__12);
+					setState(127);
+					block();
+					}
+				}
+
+				}
+				break;
+			case 2:
+				_localctx = new ForContext(_localctx);
+				enterOuterAlt(_localctx, 2);
+				{
+				setState(130);
+				match(T__13);
+				setState(131);
+				match(T__5);
+				setState(132);
+				expr(0);
+				setState(133);
+				match(T__3);
+				setState(134);
+				expr(0);
+				setState(135);
+				match(T__3);
+				setState(136);
+				expr(0);
+				setState(137);
+				match(T__6);
+				setState(138);
+				block();
+				}
+				break;
+			case 3:
+				_localctx = new WhileContext(_localctx);
+				enterOuterAlt(_localctx, 3);
+				{
+				setState(140);
+				match(T__14);
+				setState(141);
+				match(T__5);
+				setState(142);
+				expr(0);
+				setState(143);
+				match(T__6);
+				setState(144);
+				block();
+				}
+				break;
+			case 4:
+				_localctx = new DoWhileContext(_localctx);
+				enterOuterAlt(_localctx, 4);
+				{
+				setState(146);
+				match(T__15);
+				setState(147);
+				block();
+				setState(148);
+				match(T__14);
+				setState(149);
+				match(T__5);
+				setState(150);
+				expr(0);
+				setState(151);
+				match(T__6);
+				}
+				break;
+			case 5:
+				_localctx = new ReturnContext(_localctx);
+				enterOuterAlt(_localctx, 5);
+				{
+				setState(153);
+				match(T__16);
+				setState(154);
+				expr(0);
+				setState(155);
+				match(T__3);
+				}
+				break;
+			case 6:
+				_localctx = new ReturnVoidContext(_localctx);
+				enterOuterAlt(_localctx, 6);
+				{
+				setState(157);
+				match(T__16);
+				setState(158);
+				match(T__3);
+				}
+				break;
+			case 7:
+				_localctx = new BreakContext(_localctx);
+				enterOuterAlt(_localctx, 7);
+				{
+				setState(159);
+				match(T__17);
+				setState(160);
+				match(T__3);
+				}
+				break;
+			case 8:
+				_localctx = new ContinueContext(_localctx);
+				enterOuterAlt(_localctx, 8);
+				{
+				setState(161);
+				match(T__18);
+				setState(162);
+				match(T__3);
+				}
+				break;
+			case 9:
+				_localctx = new StatementExpressionstmtContext(_localctx);
+				enterOuterAlt(_localctx, 9);
+				{
+				setState(163);
+				stmtexpr();
+				}
+				break;
+			}
+		}
+		catch (RecognitionException re) {
+			_localctx.exception = re;
+			_errHandler.reportError(this, re);
+			_errHandler.recover(this, re);
+		}
+		finally {
+			exitRule();
+		}
+		return _localctx;
+	}
+
+	@SuppressWarnings("CheckReturnValue")
+	public static class StmtexprContext extends ParserRuleContext {
+		public StmtexprContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_stmtexpr; }
+	 
+		public StmtexprContext() { }
+		public void copyFrom(StmtexprContext ctx) {
+			super.copyFrom(ctx);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class NewContext extends StmtexprContext {
+		public TerminalNode NEW() { return getToken(DecafParser.NEW, 0); }
+		public TypeContext type() {
+			return getRuleContext(TypeContext.class,0);
+		}
+		public ArgsContext args() {
+			return getRuleContext(ArgsContext.class,0);
+		}
+		public NewContext(StmtexprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterNew(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitNew(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitNew(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class AssignContext extends StmtexprContext {
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public ExprContext expr() {
+			return getRuleContext(ExprContext.class,0);
+		}
+		public AssignContext(StmtexprContext 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 MethodCallContext extends StmtexprContext {
+		public MethCallContext methCall() {
+			return getRuleContext(MethCallContext.class,0);
+		}
+		public MethodCallContext(StmtexprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterMethodCall(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitMethodCall(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitMethodCall(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final StmtexprContext stmtexpr() throws RecognitionException {
+		StmtexprContext _localctx = new StmtexprContext(_ctx, getState());
+		enterRule(_localctx, 22, RULE_stmtexpr);
+		int _la;
+		try {
+			setState(182);
+			_errHandler.sync(this);
+			switch ( getInterpreter().adaptivePredict(_input,15,_ctx) ) {
+			case 1:
+				_localctx = new AssignContext(_localctx);
+				enterOuterAlt(_localctx, 1);
+				{
+				setState(166);
+				id();
+				setState(167);
+				match(T__4);
+				setState(168);
+				expr(0);
+				setState(169);
+				match(T__3);
+				}
+				break;
+			case 2:
+				_localctx = new MethodCallContext(_localctx);
+				enterOuterAlt(_localctx, 2);
+				{
+				setState(171);
+				methCall();
+				setState(172);
+				match(T__3);
+				}
+				break;
+			case 3:
+				_localctx = new NewContext(_localctx);
+				enterOuterAlt(_localctx, 3);
+				{
+				setState(174);
+				match(NEW);
+				setState(175);
+				type();
+				setState(176);
+				match(T__5);
+				setState(178);
+				_errHandler.sync(this);
+				_la = _input.LA(1);
+				if ((((_la) & ~0x3f) == 0 && ((1L << _la) & 7527727168L) != 0)) {
+					{
+					setState(177);
+					args();
+					}
+				}
+
+				setState(180);
+				match(T__6);
+				}
+				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 IdentifierContext extends ExprContext {
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public IdentifierContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterIdentifier(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitIdentifier(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitIdentifier(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@SuppressWarnings("CheckReturnValue")
+	public static class MethodCallExpressionContext extends ExprContext {
+		public MethCallContext methCall() {
+			return getRuleContext(MethCallContext.class,0);
+		}
+		public MethodCallExpressionContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterMethodCallExpression(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitMethodCallExpression(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitMethodCallExpression(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+	@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 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 StatementExpressionexprContext extends ExprContext {
+		public StmtexprContext stmtexpr() {
+			return getRuleContext(StmtexprContext.class,0);
+		}
+		public StatementExpressionexprContext(ExprContext ctx) { copyFrom(ctx); }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterStatementExpressionexpr(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitStatementExpressionexpr(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitStatementExpressionexpr(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 = 24;
+		enterRecursionRule(_localctx, 24, RULE_expr, _p);
+		try {
+			int _alt;
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(193);
+			_errHandler.sync(this);
+			switch ( getInterpreter().adaptivePredict(_input,16,_ctx) ) {
+			case 1:
+				{
+				_localctx = new ConstantContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+
+				setState(185);
+				literal();
+				}
+				break;
+			case 2:
+				{
+				_localctx = new ExpressionContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+				setState(186);
+				match(T__5);
+				setState(187);
+				expr(0);
+				setState(188);
+				match(T__6);
+				}
+				break;
+			case 3:
+				{
+				_localctx = new MethodCallExpressionContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+				setState(190);
+				methCall();
+				}
+				break;
+			case 4:
+				{
+				_localctx = new IdentifierContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+				setState(191);
+				id();
+				}
+				break;
+			case 5:
+				{
+				_localctx = new StatementExpressionexprContext(_localctx);
+				_ctx = _localctx;
+				_prevctx = _localctx;
+				setState(192);
+				stmtexpr();
+				}
+				break;
+			}
+			_ctx.stop = _input.LT(-1);
+			setState(201);
+			_errHandler.sync(this);
+			_alt = getInterpreter().adaptivePredict(_input,17,_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(195);
+					if (!(precpred(_ctx, 6))) throw new FailedPredicateException(this, "precpred(_ctx, 6)");
+					setState(196);
+					binaryOp();
+					setState(197);
+					expr(7);
+					}
+					} 
+				}
+				setState(203);
+				_errHandler.sync(this);
+				_alt = getInterpreter().adaptivePredict(_input,17,_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, 26, RULE_binaryOp);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(204);
+			_la = _input.LA(1);
+			if ( !((((_la) & ~0x3f) == 0 && ((1L << _la) & 117440512L) != 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 MethCallContext extends ParserRuleContext {
+		public IdContext id() {
+			return getRuleContext(IdContext.class,0);
+		}
+		public ArgsContext args() {
+			return getRuleContext(ArgsContext.class,0);
+		}
+		public MethCallContext(ParserRuleContext parent, int invokingState) {
+			super(parent, invokingState);
+		}
+		@Override public int getRuleIndex() { return RULE_methCall; }
+		@Override
+		public void enterRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).enterMethCall(this);
+		}
+		@Override
+		public void exitRule(ParseTreeListener listener) {
+			if ( listener instanceof DecafListener ) ((DecafListener)listener).exitMethCall(this);
+		}
+		@Override
+		public <T> T accept(ParseTreeVisitor<? extends T> visitor) {
+			if ( visitor instanceof DecafVisitor ) return ((DecafVisitor<? extends T>)visitor).visitMethCall(this);
+			else return visitor.visitChildren(this);
+		}
+	}
+
+	public final MethCallContext methCall() throws RecognitionException {
+		MethCallContext _localctx = new MethCallContext(_ctx, getState());
+		enterRule(_localctx, 28, RULE_methCall);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(206);
+			id();
+			setState(207);
+			match(T__5);
+			setState(209);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			if ((((_la) & ~0x3f) == 0 && ((1L << _la) & 7527727168L) != 0)) {
+				{
+				setState(208);
+				args();
+				}
+			}
+
+			setState(211);
+			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 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, 30, RULE_args);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(213);
+			expr(0);
+			setState(218);
+			_errHandler.sync(this);
+			_la = _input.LA(1);
+			while (_la==T__10) {
+				{
+				{
+				setState(214);
+				match(T__10);
+				setState(215);
+				expr(0);
+				}
+				}
+				setState(220);
+				_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 TerminalNode NUMBER() { return getToken(DecafParser.NUMBER, 0); }
+		public BooleanContext boolean_() {
+			return getRuleContext(BooleanContext.class,0);
+		}
+		public TerminalNode CHAR() { return getToken(DecafParser.CHAR, 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, 32, RULE_literal);
+		try {
+			setState(224);
+			_errHandler.sync(this);
+			switch (_input.LA(1)) {
+			case NUMBER:
+				enterOuterAlt(_localctx, 1);
+				{
+				setState(221);
+				match(NUMBER);
+				}
+				break;
+			case T__19:
+			case T__20:
+				enterOuterAlt(_localctx, 2);
+				{
+				setState(222);
+				boolean_();
+				}
+				break;
+			case CHAR:
+				enterOuterAlt(_localctx, 3);
+				{
+				setState(223);
+				match(CHAR);
+				}
+				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, 34, RULE_boolean);
+		int _la;
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(226);
+			_la = _input.LA(1);
+			if ( !(_la==T__19 || _la==T__20) ) {
+			_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 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, 36, RULE_id);
+		try {
+			enterOuterAlt(_localctx, 1);
+			{
+			setState(228);
+			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 12:
+			return expr_sempred((ExprContext)_localctx, predIndex);
+		}
+		return true;
+	}
+	private boolean expr_sempred(ExprContext _localctx, int predIndex) {
+		switch (predIndex) {
+		case 0:
+			return precpred(_ctx, 6);
+		}
+		return true;
+	}
+
+	public static final String _serializedATN =
+		"\u0004\u0001!\u00e7\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"+
+		"\u0001\u0000\u0004\u0000(\b\u0000\u000b\u0000\f\u0000)\u0001\u0001\u0003"+
+		"\u0001-\b\u0001\u0001\u0001\u0001\u0001\u0001\u0001\u0001\u0001\u0001"+
+		"\u0001\u0005\u00014\b\u0001\n\u0001\f\u00017\t\u0001\u0001\u0001\u0001"+
+		"\u0001\u0001\u0002\u0001\u0002\u0001\u0002\u0001\u0002\u0001\u0002\u0001"+
+		"\u0002\u0001\u0002\u0001\u0002\u0001\u0002\u0001\u0002\u0003\u0002E\b"+
+		"\u0002\u0001\u0003\u0001\u0003\u0003\u0003I\b\u0003\u0001\u0004\u0001"+
+		"\u0004\u0001\u0005\u0003\u0005N\b\u0005\u0001\u0005\u0001\u0005\u0001"+
+		"\u0005\u0001\u0005\u0003\u0005T\b\u0005\u0001\u0005\u0001\u0005\u0001"+
+		"\u0005\u0001\u0005\u0003\u0005Z\b\u0005\u0001\u0006\u0001\u0006\u0001"+
+		"\u0006\u0001\u0006\u0001\u0006\u0001\u0006\u0001\u0006\u0001\u0006\u0001"+
+		"\u0006\u0001\u0007\u0001\u0007\u0001\u0007\u0005\u0007h\b\u0007\n\u0007"+
+		"\f\u0007k\t\u0007\u0001\b\u0001\b\u0001\b\u0001\t\u0001\t\u0001\t\u0005"+
+		"\ts\b\t\n\t\f\tv\t\t\u0001\t\u0001\t\u0001\n\u0001\n\u0001\n\u0001\n\u0001"+
+		"\n\u0001\n\u0001\n\u0003\n\u0081\b\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001"+
+		"\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001"+
+		"\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001"+
+		"\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001\n\u0001"+
+		"\n\u0001\n\u0001\n\u0003\n\u00a5\b\n\u0001\u000b\u0001\u000b\u0001\u000b"+
+		"\u0001\u000b\u0001\u000b\u0001\u000b\u0001\u000b\u0001\u000b\u0001\u000b"+
+		"\u0001\u000b\u0001\u000b\u0001\u000b\u0003\u000b\u00b3\b\u000b\u0001\u000b"+
+		"\u0001\u000b\u0003\u000b\u00b7\b\u000b\u0001\f\u0001\f\u0001\f\u0001\f"+
+		"\u0001\f\u0001\f\u0001\f\u0001\f\u0001\f\u0003\f\u00c2\b\f\u0001\f\u0001"+
+		"\f\u0001\f\u0001\f\u0005\f\u00c8\b\f\n\f\f\f\u00cb\t\f\u0001\r\u0001\r"+
+		"\u0001\u000e\u0001\u000e\u0001\u000e\u0003\u000e\u00d2\b\u000e\u0001\u000e"+
+		"\u0001\u000e\u0001\u000f\u0001\u000f\u0001\u000f\u0005\u000f\u00d9\b\u000f"+
+		"\n\u000f\f\u000f\u00dc\t\u000f\u0001\u0010\u0001\u0010\u0001\u0010\u0003"+
+		"\u0010\u00e1\b\u0010\u0001\u0011\u0001\u0011\u0001\u0012\u0001\u0012\u0001"+
+		"\u0012\u0000\u0001\u0018\u0013\u0000\u0002\u0004\u0006\b\n\f\u000e\u0010"+
+		"\u0012\u0014\u0016\u0018\u001a\u001c\u001e \"$\u0000\u0003\u0002\u0000"+
+		"\u001b\u001c\u001e\u001e\u0001\u0000\u0018\u001a\u0001\u0000\u0014\u0015"+
+		"\u00f4\u0000\'\u0001\u0000\u0000\u0000\u0002,\u0001\u0000\u0000\u0000"+
+		"\u0004D\u0001\u0000\u0000\u0000\u0006H\u0001\u0000\u0000\u0000\bJ\u0001"+
+		"\u0000\u0000\u0000\nY\u0001\u0000\u0000\u0000\f[\u0001\u0000\u0000\u0000"+
+		"\u000ed\u0001\u0000\u0000\u0000\u0010l\u0001\u0000\u0000\u0000\u0012o"+
+		"\u0001\u0000\u0000\u0000\u0014\u00a4\u0001\u0000\u0000\u0000\u0016\u00b6"+
+		"\u0001\u0000\u0000\u0000\u0018\u00c1\u0001\u0000\u0000\u0000\u001a\u00cc"+
+		"\u0001\u0000\u0000\u0000\u001c\u00ce\u0001\u0000\u0000\u0000\u001e\u00d5"+
+		"\u0001\u0000\u0000\u0000 \u00e0\u0001\u0000\u0000\u0000\"\u00e2\u0001"+
+		"\u0000\u0000\u0000$\u00e4\u0001\u0000\u0000\u0000&(\u0003\u0002\u0001"+
+		"\u0000\'&\u0001\u0000\u0000\u0000()\u0001\u0000\u0000\u0000)\'\u0001\u0000"+
+		"\u0000\u0000)*\u0001\u0000\u0000\u0000*\u0001\u0001\u0000\u0000\u0000"+
+		"+-\u0005\u0016\u0000\u0000,+\u0001\u0000\u0000\u0000,-\u0001\u0000\u0000"+
+		"\u0000-.\u0001\u0000\u0000\u0000./\u0005\u0001\u0000\u0000/0\u0003$\u0012"+
+		"\u000005\u0005\u0002\u0000\u000014\u0003\u0004\u0002\u000024\u0003\n\u0005"+
+		"\u000031\u0001\u0000\u0000\u000032\u0001\u0000\u0000\u000047\u0001\u0000"+
+		"\u0000\u000053\u0001\u0000\u0000\u000056\u0001\u0000\u0000\u000068\u0001"+
+		"\u0000\u0000\u000075\u0001\u0000\u0000\u000089\u0005\u0003\u0000\u0000"+
+		"9\u0003\u0001\u0000\u0000\u0000:;\u0003\b\u0004\u0000;<\u0003$\u0012\u0000"+
+		"<=\u0005\u0004\u0000\u0000=E\u0001\u0000\u0000\u0000>?\u0003\b\u0004\u0000"+
+		"?@\u0003$\u0012\u0000@A\u0005\u0005\u0000\u0000AB\u0003\u0018\f\u0000"+
+		"BC\u0005\u0004\u0000\u0000CE\u0001\u0000\u0000\u0000D:\u0001\u0000\u0000"+
+		"\u0000D>\u0001\u0000\u0000\u0000E\u0005\u0001\u0000\u0000\u0000FI\u0003"+
+		"\b\u0004\u0000GI\u0005\u001d\u0000\u0000HF\u0001\u0000\u0000\u0000HG\u0001"+
+		"\u0000\u0000\u0000I\u0007\u0001\u0000\u0000\u0000JK\u0007\u0000\u0000"+
+		"\u0000K\t\u0001\u0000\u0000\u0000LN\u0005\u0016\u0000\u0000ML\u0001\u0000"+
+		"\u0000\u0000MN\u0001\u0000\u0000\u0000NO\u0001\u0000\u0000\u0000OP\u0003"+
+		"\u0006\u0003\u0000PQ\u0003$\u0012\u0000QS\u0005\u0006\u0000\u0000RT\u0003"+
+		"\u000e\u0007\u0000SR\u0001\u0000\u0000\u0000ST\u0001\u0000\u0000\u0000"+
+		"TU\u0001\u0000\u0000\u0000UV\u0005\u0007\u0000\u0000VW\u0003\u0012\t\u0000"+
+		"WZ\u0001\u0000\u0000\u0000XZ\u0003\f\u0006\u0000YM\u0001\u0000\u0000\u0000"+
+		"YX\u0001\u0000\u0000\u0000Z\u000b\u0001\u0000\u0000\u0000[\\\u0005\u0016"+
+		"\u0000\u0000\\]\u0005\b\u0000\u0000]^\u0005\u001d\u0000\u0000^_\u0005"+
+		"\t\u0000\u0000_`\u0005\u0006\u0000\u0000`a\u0005\n\u0000\u0000ab\u0005"+
+		"\u0007\u0000\u0000bc\u0003\u0012\t\u0000c\r\u0001\u0000\u0000\u0000di"+
+		"\u0003\u0010\b\u0000ef\u0005\u000b\u0000\u0000fh\u0003\u0010\b\u0000g"+
+		"e\u0001\u0000\u0000\u0000hk\u0001\u0000\u0000\u0000ig\u0001\u0000\u0000"+
+		"\u0000ij\u0001\u0000\u0000\u0000j\u000f\u0001\u0000\u0000\u0000ki\u0001"+
+		"\u0000\u0000\u0000lm\u0003\b\u0004\u0000mn\u0003$\u0012\u0000n\u0011\u0001"+
+		"\u0000\u0000\u0000ot\u0005\u0002\u0000\u0000ps\u0003\u0004\u0002\u0000"+
+		"qs\u0003\u0014\n\u0000rp\u0001\u0000\u0000\u0000rq\u0001\u0000\u0000\u0000"+
+		"sv\u0001\u0000\u0000\u0000tr\u0001\u0000\u0000\u0000tu\u0001\u0000\u0000"+
+		"\u0000uw\u0001\u0000\u0000\u0000vt\u0001\u0000\u0000\u0000wx\u0005\u0003"+
+		"\u0000\u0000x\u0013\u0001\u0000\u0000\u0000yz\u0005\f\u0000\u0000z{\u0005"+
+		"\u0006\u0000\u0000{|\u0003\u0018\f\u0000|}\u0005\u0007\u0000\u0000}\u0080"+
+		"\u0003\u0012\t\u0000~\u007f\u0005\r\u0000\u0000\u007f\u0081\u0003\u0012"+
+		"\t\u0000\u0080~\u0001\u0000\u0000\u0000\u0080\u0081\u0001\u0000\u0000"+
+		"\u0000\u0081\u00a5\u0001\u0000\u0000\u0000\u0082\u0083\u0005\u000e\u0000"+
+		"\u0000\u0083\u0084\u0005\u0006\u0000\u0000\u0084\u0085\u0003\u0018\f\u0000"+
+		"\u0085\u0086\u0005\u0004\u0000\u0000\u0086\u0087\u0003\u0018\f\u0000\u0087"+
+		"\u0088\u0005\u0004\u0000\u0000\u0088\u0089\u0003\u0018\f\u0000\u0089\u008a"+
+		"\u0005\u0007\u0000\u0000\u008a\u008b\u0003\u0012\t\u0000\u008b\u00a5\u0001"+
+		"\u0000\u0000\u0000\u008c\u008d\u0005\u000f\u0000\u0000\u008d\u008e\u0005"+
+		"\u0006\u0000\u0000\u008e\u008f\u0003\u0018\f\u0000\u008f\u0090\u0005\u0007"+
+		"\u0000\u0000\u0090\u0091\u0003\u0012\t\u0000\u0091\u00a5\u0001\u0000\u0000"+
+		"\u0000\u0092\u0093\u0005\u0010\u0000\u0000\u0093\u0094\u0003\u0012\t\u0000"+
+		"\u0094\u0095\u0005\u000f\u0000\u0000\u0095\u0096\u0005\u0006\u0000\u0000"+
+		"\u0096\u0097\u0003\u0018\f\u0000\u0097\u0098\u0005\u0007\u0000\u0000\u0098"+
+		"\u00a5\u0001\u0000\u0000\u0000\u0099\u009a\u0005\u0011\u0000\u0000\u009a"+
+		"\u009b\u0003\u0018\f\u0000\u009b\u009c\u0005\u0004\u0000\u0000\u009c\u00a5"+
+		"\u0001\u0000\u0000\u0000\u009d\u009e\u0005\u0011\u0000\u0000\u009e\u00a5"+
+		"\u0005\u0004\u0000\u0000\u009f\u00a0\u0005\u0012\u0000\u0000\u00a0\u00a5"+
+		"\u0005\u0004\u0000\u0000\u00a1\u00a2\u0005\u0013\u0000\u0000\u00a2\u00a5"+
+		"\u0005\u0004\u0000\u0000\u00a3\u00a5\u0003\u0016\u000b\u0000\u00a4y\u0001"+
+		"\u0000\u0000\u0000\u00a4\u0082\u0001\u0000\u0000\u0000\u00a4\u008c\u0001"+
+		"\u0000\u0000\u0000\u00a4\u0092\u0001\u0000\u0000\u0000\u00a4\u0099\u0001"+
+		"\u0000\u0000\u0000\u00a4\u009d\u0001\u0000\u0000\u0000\u00a4\u009f\u0001"+
+		"\u0000\u0000\u0000\u00a4\u00a1\u0001\u0000\u0000\u0000\u00a4\u00a3\u0001"+
+		"\u0000\u0000\u0000\u00a5\u0015\u0001\u0000\u0000\u0000\u00a6\u00a7\u0003"+
+		"$\u0012\u0000\u00a7\u00a8\u0005\u0005\u0000\u0000\u00a8\u00a9\u0003\u0018"+
+		"\f\u0000\u00a9\u00aa\u0005\u0004\u0000\u0000\u00aa\u00b7\u0001\u0000\u0000"+
+		"\u0000\u00ab\u00ac\u0003\u001c\u000e\u0000\u00ac\u00ad\u0005\u0004\u0000"+
+		"\u0000\u00ad\u00b7\u0001\u0000\u0000\u0000\u00ae\u00af\u0005\u0017\u0000"+
+		"\u0000\u00af\u00b0\u0003\b\u0004\u0000\u00b0\u00b2\u0005\u0006\u0000\u0000"+
+		"\u00b1\u00b3\u0003\u001e\u000f\u0000\u00b2\u00b1\u0001\u0000\u0000\u0000"+
+		"\u00b2\u00b3\u0001\u0000\u0000\u0000\u00b3\u00b4\u0001\u0000\u0000\u0000"+
+		"\u00b4\u00b5\u0005\u0007\u0000\u0000\u00b5\u00b7\u0001\u0000\u0000\u0000"+
+		"\u00b6\u00a6\u0001\u0000\u0000\u0000\u00b6\u00ab\u0001\u0000\u0000\u0000"+
+		"\u00b6\u00ae\u0001\u0000\u0000\u0000\u00b7\u0017\u0001\u0000\u0000\u0000"+
+		"\u00b8\u00b9\u0006\f\uffff\uffff\u0000\u00b9\u00c2\u0003 \u0010\u0000"+
+		"\u00ba\u00bb\u0005\u0006\u0000\u0000\u00bb\u00bc\u0003\u0018\f\u0000\u00bc"+
+		"\u00bd\u0005\u0007\u0000\u0000\u00bd\u00c2\u0001\u0000\u0000\u0000\u00be"+
+		"\u00c2\u0003\u001c\u000e\u0000\u00bf\u00c2\u0003$\u0012\u0000\u00c0\u00c2"+
+		"\u0003\u0016\u000b\u0000\u00c1\u00b8\u0001\u0000\u0000\u0000\u00c1\u00ba"+
+		"\u0001\u0000\u0000\u0000\u00c1\u00be\u0001\u0000\u0000\u0000\u00c1\u00bf"+
+		"\u0001\u0000\u0000\u0000\u00c1\u00c0\u0001\u0000\u0000\u0000\u00c2\u00c9"+
+		"\u0001\u0000\u0000\u0000\u00c3\u00c4\n\u0006\u0000\u0000\u00c4\u00c5\u0003"+
+		"\u001a\r\u0000\u00c5\u00c6\u0003\u0018\f\u0007\u00c6\u00c8\u0001\u0000"+
+		"\u0000\u0000\u00c7\u00c3\u0001\u0000\u0000\u0000\u00c8\u00cb\u0001\u0000"+
+		"\u0000\u0000\u00c9\u00c7\u0001\u0000\u0000\u0000\u00c9\u00ca\u0001\u0000"+
+		"\u0000\u0000\u00ca\u0019\u0001\u0000\u0000\u0000\u00cb\u00c9\u0001\u0000"+
+		"\u0000\u0000\u00cc\u00cd\u0007\u0001\u0000\u0000\u00cd\u001b\u0001\u0000"+
+		"\u0000\u0000\u00ce\u00cf\u0003$\u0012\u0000\u00cf\u00d1\u0005\u0006\u0000"+
+		"\u0000\u00d0\u00d2\u0003\u001e\u000f\u0000\u00d1\u00d0\u0001\u0000\u0000"+
+		"\u0000\u00d1\u00d2\u0001\u0000\u0000\u0000\u00d2\u00d3\u0001\u0000\u0000"+
+		"\u0000\u00d3\u00d4\u0005\u0007\u0000\u0000\u00d4\u001d\u0001\u0000\u0000"+
+		"\u0000\u00d5\u00da\u0003\u0018\f\u0000\u00d6\u00d7\u0005\u000b\u0000\u0000"+
+		"\u00d7\u00d9\u0003\u0018\f\u0000\u00d8\u00d6\u0001\u0000\u0000\u0000\u00d9"+
+		"\u00dc\u0001\u0000\u0000\u0000\u00da\u00d8\u0001\u0000\u0000\u0000\u00da"+
+		"\u00db\u0001\u0000\u0000\u0000\u00db\u001f\u0001\u0000\u0000\u0000\u00dc"+
+		"\u00da\u0001\u0000\u0000\u0000\u00dd\u00e1\u0005 \u0000\u0000\u00de\u00e1"+
+		"\u0003\"\u0011\u0000\u00df\u00e1\u0005\u001e\u0000\u0000\u00e0\u00dd\u0001"+
+		"\u0000\u0000\u0000\u00e0\u00de\u0001\u0000\u0000\u0000\u00e0\u00df\u0001"+
+		"\u0000\u0000\u0000\u00e1!\u0001\u0000\u0000\u0000\u00e2\u00e3\u0007\u0002"+
+		"\u0000\u0000\u00e3#\u0001\u0000\u0000\u0000\u00e4\u00e5\u0005\u001f\u0000"+
+		"\u0000\u00e5%\u0001\u0000\u0000\u0000\u0015),35DHMSYirt\u0080\u00a4\u00b2"+
+		"\u00b6\u00c1\u00c9\u00d1\u00da\u00e0";
+	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/maishai/antlr/DecafVisitor.java b/src/main/java/de/maishai/antlr/DecafVisitor.java
new file mode 100644
index 0000000..2704c63
--- /dev/null
+++ b/src/main/java/de/maishai/antlr/DecafVisitor.java
@@ -0,0 +1,235 @@
+// Generated from C:/dev/Compilerbau/CompilerULTIMATE/src/main/antlr/Decaf.g4 by ANTLR 4.13.1
+package de.maishai.antlr;
+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#class}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitClass(DecafParser.ClassContext 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#returntype}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitReturntype(DecafParser.ReturntypeContext 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#meth}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitMeth(DecafParser.MethContext ctx);
+	/**
+	 * Visit a parse tree produced by {@link DecafParser#mainmeth}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitMainmeth(DecafParser.MainmethContext 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 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 For}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitFor(DecafParser.ForContext 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 DoWhile}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitDoWhile(DecafParser.DoWhileContext 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 StatementExpressionstmt}
+	 * labeled alternative in {@link DecafParser#stmt}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitStatementExpressionstmt(DecafParser.StatementExpressionstmtContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Assign}
+	 * labeled alternative in {@link DecafParser#stmtexpr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitAssign(DecafParser.AssignContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code MethodCall}
+	 * labeled alternative in {@link DecafParser#stmtexpr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitMethodCall(DecafParser.MethodCallContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code New}
+	 * labeled alternative in {@link DecafParser#stmtexpr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitNew(DecafParser.NewContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code Identifier}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitIdentifier(DecafParser.IdentifierContext ctx);
+	/**
+	 * Visit a parse tree produced by the {@code MethodCallExpression}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitMethodCallExpression(DecafParser.MethodCallExpressionContext 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 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 StatementExpressionexpr}
+	 * labeled alternative in {@link DecafParser#expr}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitStatementExpressionexpr(DecafParser.StatementExpressionexprContext 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#methCall}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitMethCall(DecafParser.MethCallContext 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#id}.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	T visitId(DecafParser.IdContext ctx);
+}
\ No newline at end of file