interface changes and some typecheck for code block. also some minor changes in blockstatement structure

.idea/compiler.xml

@@ -6,10 +6,8 @@
         <sourceOutputDir name="target/generated-sources/annotations" />
         <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
         <outputRelativeToContentRoot value="true" />
+        <module name="NichtHaskell" />
       </profile>
     </annotationProcessing>
-    <bytecodeTargetLevel>
-      <module name="NichtHaskell" target="20" />
-    </bytecodeTargetLevel>
   </component>
 </project>

NichtHaskell.iml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
+<module version="4">
   <component name="AdditionalModuleElements">
     <content url="file://$MODULE_DIR$" dumb="true">
       <sourceFolder url="file://$MODULE_DIR$/Source" isTestSource="false" />

src/main/java/Compiler.java

@@ -2,6 +2,7 @@ import abstractSyntaxTree.Class.FieldDecl;
 import abstractSyntaxTree.Class.MethodDecl;
 import abstractSyntaxTree.Class.RefType;
 import abstractSyntaxTree.Program;
+import abstractSyntaxTree.Statement.BlockStatement;
 import gen.DecafLexer;
 import gen.DecafParser;
 import org.antlr.v4.runtime.CharStream;
@@ -51,8 +52,26 @@ public class Compiler {
         System.out.println(tree);
 
 
-
         Program abstractSyntaxTree = new Program(new ArrayList<>());
+        List<FieldDecl> fieldDecls = new ArrayList<>();
+
+        FieldDecl fieldDecl = new FieldDecl("int", "i");
+        fieldDecls.add(fieldDecl);
+
+//        FieldDecl fieldDecl2 = new FieldDecl("char", "i");
+//        fieldDecls.add(fieldDecl2);
+
+        List<MethodDecl> methodDecls = new ArrayList<>();
+
+        MethodDecl methodDecl = new MethodDecl("ClassA", "int", "m", new ArrayList<>(), new BlockStatement(new ArrayList<>(), "void"));
+        methodDecls.add(methodDecl);
+
+//        MethodDecl methodDecl2 = new MethodDecl("ClassA", "int", "m", new ArrayList<>(), new ArrayList<>());
+//        methodDecls.add(methodDecl2);
+
+        abstractSyntaxTree.classes.add(new RefType("MyClass", fieldDecls, methodDecls, false));
+
+
 
         abstractSyntaxTree.typeCheck();
 

src/main/java/abstractSyntaxTree/Class/MethodDecl.java

@@ -2,11 +2,13 @@ package abstractSyntaxTree.Class;
 
 import TypeCheck.TypeCheckResult;
 import abstractSyntaxTree.Program;
+import abstractSyntaxTree.Statement.BlockStatement;
 import abstractSyntaxTree.Statement.IStatement;
 import org.objectweb.asm.ClassWriter;
 
 import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 public class MethodDecl implements IClass {
 
@@ -14,11 +16,11 @@ public class MethodDecl implements IClass {
     public String name;
     public List<String> parameters;
     public String returnType;
-    public List<IStatement> codeBlock;
+    public BlockStatement codeBlock;
 
-    // save localvars
+    public Map<String, String> localVars;
 
-    public MethodDecl(String classThatContainsMethod, String returnType, String name, List<String> parameters, List<IStatement> codeBlock){
+    public MethodDecl(String classThatContainsMethod, String returnType, String name, List<String> parameters, BlockStatement codeBlock){
         this.classThatContainsMethod = classThatContainsMethod;
         this.returnType = returnType;
         this.name = name;
@@ -27,8 +29,9 @@ public class MethodDecl implements IClass {
     }
 
     public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, List<String>>>> methodContext, HashMap<String, HashMap<String, String>> typeContext) throws Exception {
-        // write localvars
-        // jede methode als block statement aufrufen
+        // jede methode als block statement aufrufen und jede neue locale varibale in localvars schreiben
+
+        codeBlock.typeCheck(methodContext, typeContext);
         return null;
     }
 

src/main/java/abstractSyntaxTree/Program.java

@@ -27,29 +27,35 @@ public class Program {
 
 
     public TypeCheckResult typeCheck() throws Exception{
+        this.typeContext = new HashMap<>();
+        this.methodContext = new HashMap<>();
+
         for(RefType oneClass : classes){
 
             // build type context
-            this.typeContext = new HashMap<>();
-
             HashMap<String, String> classVars = new HashMap<>();
             for (FieldDecl fieldDecl: oneClass.fieldDecls){
                 classVars.put(fieldDecl.type, fieldDecl.identifier);
             }
             typeContext.put(oneClass.name, classVars);
 
+            // build method context
             HashMap<String, List<String>> methodIdentifierAndParameter = new HashMap<>();
             HashMap<String, HashMap<String, List<String >>> returnTypeAndMethod = new HashMap<>();
             for (MethodDecl methodDecl : oneClass.methodDecls){
                 methodIdentifierAndParameter.put(methodDecl.name, methodDecl.parameters);
                 returnTypeAndMethod.put(methodDecl.returnType, methodIdentifierAndParameter);
             }
-            this.methodContext = new HashMap<>();
             methodContext.put(oneClass.name, returnTypeAndMethod);
+        }
 
+        // typecheck each class
+        TypeCheckResult result = new TypeCheckResult();
+        for(RefType oneClass : classes){
             oneClass.typeCheck(methodContext, typeContext);
         }
-        return null;
+        result.type = "program";
+        return result;
     }
 
     public void codeGen() throws Exception{

src/main/java/abstractSyntaxTree/Statement/BlockStatement.java

@@ -11,32 +11,37 @@ public class BlockStatement extends AbstractType implements IStatement{
 
     //We will need a parameter which holds the symbol table
     HashMap<String, String > localVars;
-    HashMap<String, String > typeIndentifierTable; // from program
+    String returnType;
     List<IStatement> statements;
     // do we need expression, statementexpression
 
-    public BlockStatement(List<IStatement> statements, HashMap<String, String> localVars, HashMap<String, String> typeIndentifierTable){
-
+    public BlockStatement(List<IStatement> statements, String returnType){
         this.statements = statements;
+        this.returnType = returnType;
     }
+
     @Override
     public TypeCheckResult typeCheck() throws Exception {
+        return null;
+    }
+
+    @Override
+    public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, List<String>>>> methodContext, HashMap<String, HashMap<String, String>> typeContext) throws Exception {
         TypeCheckResult result = new TypeCheckResult();
 
         if(statements.size() == 0){
             result.type = "void";
         }
 
-        TypeCheckResult blockType = null;
+        TypeCheckResult blockType = new TypeCheckResult();
         for (IStatement statement : statements) {
             TypeCheckResult typeOfCurrentStatement = statement.typeCheck();
 
-            if (blockType == null) {
-                blockType = typeOfCurrentStatement;
-            } else if (!typeOfCurrentStatement.equals(blockType) && !blockType.equals("void")) {
-                throw new IllegalArgumentException("different statement types");
+            if (!typeOfCurrentStatement.equals(this.returnType) && !blockType.equals("void")) {
+                throw new IllegalArgumentException("Block returns type that it should not return");
             }
         }
+        // todo check if the block returns the needed return type in every case
         return result;
     }
 

src/main/java/abstractSyntaxTree/Statement/EmptyStatement.java

@@ -4,6 +4,9 @@ import TypeCheck.TypeCheckResult;
 import TypeCheck.AbstractType;
 import org.objectweb.asm.MethodVisitor;
 
+import java.util.HashMap;
+import java.util.List;
+
 public class EmptyStatement  extends AbstractType implements IStatement{
     @Override
     public TypeCheckResult typeCheck() throws Exception {
@@ -12,6 +15,11 @@ public class EmptyStatement  extends AbstractType implements IStatement{
         return result;
     }
 
+    @Override
+    public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, List<String>>>> methodContext, HashMap<String, HashMap<String, String>> typeContext) throws Exception {
+        return null;
+    }
+
     @Override
     public void codeGen(MethodVisitor mv) throws Exception {
         //An empty statement does not generate any code

src/main/java/abstractSyntaxTree/Statement/IStatement.java

@@ -3,11 +3,16 @@ package abstractSyntaxTree.Statement;
 import TypeCheck.TypeCheckResult;
 import org.objectweb.asm.MethodVisitor;
 
+import java.util.HashMap;
+import java.util.List;
+
 public interface IStatement {
 
 
 
     TypeCheckResult typeCheck() throws Exception;
 
+    TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, List<String>>>> methodContext, HashMap<String, HashMap<String, String>> typeContext) throws Exception;
+
     void codeGen(MethodVisitor mv) throws Exception;
 }

src/main/java/abstractSyntaxTree/Statement/IfElseStatement.java

@@ -5,6 +5,9 @@ import TypeCheck.AbstractType;
 import abstractSyntaxTree.Expression.IExpression;
 import org.objectweb.asm.*;
 
+import java.util.HashMap;
+import java.util.List;
+
 public class IfElseStatement extends AbstractType implements IStatement{
     IExpression condition;
     IStatement ifStatement;
@@ -37,6 +40,11 @@ public class IfElseStatement extends AbstractType implements IStatement{
         return result;
     }
 
+    @Override
+    public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, List<String>>>> methodContext, HashMap<String, HashMap<String, String>> typeContext) throws Exception {
+        return null;
+    }
+
     @Override
     public void codeGen(MethodVisitor mv) throws Exception {
 

src/main/java/abstractSyntaxTree/Statement/IfStatement.java

@@ -5,6 +5,9 @@ import TypeCheck.AbstractType;
 import abstractSyntaxTree.Expression.IExpression;
 import org.objectweb.asm.*;
 
+import java.util.HashMap;
+import java.util.List;
+
 public class IfStatement extends AbstractType implements IStatement{
     IExpression condition;
 
@@ -30,6 +33,11 @@ public class IfStatement extends AbstractType implements IStatement{
         return result;
     }
 
+    @Override
+    public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, List<String>>>> methodContext, HashMap<String, HashMap<String, String>> typeContext) throws Exception {
+        return null;
+    }
+
     @Override
     public void codeGen(MethodVisitor mv) throws Exception {
 

src/main/java/abstractSyntaxTree/Statement/ReturnStatement.java

@@ -5,6 +5,9 @@ import TypeCheck.AbstractType;
 import abstractSyntaxTree.Expression.IExpression;
 import org.objectweb.asm.*;
 
+import java.util.HashMap;
+import java.util.List;
+
 public class ReturnStatement extends AbstractType implements IStatement{
     IExpression expression;
 
@@ -26,6 +29,11 @@ public class ReturnStatement extends AbstractType implements IStatement{
         return result;
     }
 
+    @Override
+    public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, List<String>>>> methodContext, HashMap<String, HashMap<String, String>> typeContext) throws Exception {
+        return null;
+    }
+
 
     //TODO: We do not differentiate between primitive types and reference types
     //      This is a problem at "BinaryExpression" and here because we need to know the type to return

src/main/java/abstractSyntaxTree/Statement/WhileStatement.java

@@ -5,6 +5,9 @@ import TypeCheck.AbstractType;
 import abstractSyntaxTree.Expression.IExpression;
 import org.objectweb.asm.*;
 
+import java.util.HashMap;
+import java.util.List;
+
 public class WhileStatement extends AbstractType implements IStatement {
     IExpression condition;
     IStatement statement;
@@ -30,6 +33,11 @@ public class WhileStatement extends AbstractType implements IStatement {
         return result;
     }
 
+    @Override
+    public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, List<String>>>> methodContext, HashMap<String, HashMap<String, String>> typeContext) throws Exception {
+        return null;
+    }
+
     @Override
     public void codeGen(MethodVisitor mv) throws Exception {
         Label conditionFalse = new Label();

src/main/java/abstractSyntaxTree/StatementExpression/AssignStatementExpression.java

@@ -9,6 +9,8 @@ import abstractSyntaxTree.Expression.VarRefExpression;
 import abstractSyntaxTree.Statement.IStatement;
 import org.objectweb.asm.*;
 
+import java.util.HashMap;
+import java.util.List;
 import java.util.Objects;
 
 public class AssignStatementExpression extends AbstractType implements IExpression, IStatement {
@@ -32,6 +34,11 @@ public class AssignStatementExpression extends AbstractType implements IExpressi
         return result;
     }
 
+    @Override
+    public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, List<String>>>> methodContext, HashMap<String, HashMap<String, String>> typeContext) throws Exception {
+        return null;
+    }
+
     @Override
     public void codeGen(MethodVisitor mv) throws Exception {
         left.codeGen(mv);

src/main/java/abstractSyntaxTree/StatementExpression/MethodCallStatementExpression.java

@@ -10,6 +10,7 @@ import org.objectweb.asm.ClassWriter;
 import org.objectweb.asm.MethodVisitor;
 import org.objectweb.asm.Opcodes;
 
+import java.util.HashMap;
 import java.util.List;
 
 public class MethodCallStatementExpression extends AbstractType implements IExpression, IStatement {
@@ -43,6 +44,11 @@ public class MethodCallStatementExpression extends AbstractType implements IExpr
         return result;
     }
 
+    @Override
+    public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, List<String>>>> methodContext, HashMap<String, HashMap<String, String>> typeContext) throws Exception {
+        return null;
+    }
+
     //Errors occur due to the change in parameter in the RefType class
     @Override
     public void codeGen(MethodVisitor mv) throws Exception {

src/main/java/abstractSyntaxTree/StatementExpression/NewStatementExpression.java

@@ -6,12 +6,20 @@ import abstractSyntaxTree.Expression.IExpression;
 import abstractSyntaxTree.Statement.IStatement;
 import org.objectweb.asm.MethodVisitor;
 
+import java.util.HashMap;
+import java.util.List;
+
 public class NewStatementExpression extends AbstractType implements IExpression, IStatement {
     @Override
     public TypeCheckResult typeCheck() throws Exception {
         return null;
     }
 
+    @Override
+    public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, List<String>>>> methodContext, HashMap<String, HashMap<String, String>> typeContext) throws Exception {
+        return null;
+    }
+
     @Override
     public void codeGen(MethodVisitor mv) throws Exception {
         throw new Exception("CodeGen not implemented for NewStatementExpression");