src/main/java/CompilerInput.txt

@@ -5,7 +5,9 @@ public class Example {
     public static int testMethod(char b){
 
          int a;
-         int a;
+         boolean b;
+         char c;
+         b = 3;
 
 
     }

src/main/java/Main.java

@@ -1,4 +1,3 @@
-import ast.ASTNode;
 import ast.ClassNode;
 import ast.ProgramNode;
 import bytecode.ByteCodeGenerator;
@@ -18,14 +17,14 @@ public class Main {
     public static void main(String[] args) throws Exception {
         try {
             CharStream codeCharStream = CharStreams.fromPath(Paths.get("src/main/java/CompilerInput.txt"));
-            parseFile(codeCharStream);
+            parsefile(codeCharStream);
         } catch (IOException e) {
             System.err.println("Error reading the file: " + e.getMessage());
         }
     }
 
 
-    static void parseFile(CharStream codeCharStream){
+    static void parsefile(CharStream codeCharStream){
         SimpleJavaLexer lexer = new SimpleJavaLexer(codeCharStream);
         CommonTokenStream tokens = new CommonTokenStream(lexer);
         SimpleJavaParser parser = new SimpleJavaParser(tokens);
@@ -35,9 +34,9 @@ public class Main {
         ASTBuilder builder = new ASTBuilder();
         ProgramNode ast = (ProgramNode) builder.visit(tree); // build the AST
 
-        ProgramNode typedAst = (ProgramNode) SemanticAnalyzer.generateTast(ast);
+        SemanticAnalyzer.generateTast(ast);
 
         ByteCodeGenerator byteCodeGenerator = new ByteCodeGenerator();
-        byteCodeGenerator.visit(typedAst);
+        byteCodeGenerator.visit(ast);
     }
 }

src/main/java/ast/ClassNode.java

@@ -11,7 +11,7 @@ import java.util.List;
 import bytecode.visitor.ClassVisitor;
 import semantic.SemanticVisitor;
 import typechecker.TypeCheckResult;
-import visitor.Visitable;
+import typechecker.Visitable;
 
 public class ClassNode implements ASTNode, Visitable {
     public String identifier;

src/main/java/ast/LiteralNode.java

@@ -1,10 +1,8 @@
 package ast;
 
 import ast.expression.ExpressionNode;
-import semantic.SemanticVisitor;
-import typechecker.TypeCheckResult;
 
-public class LiteralNode implements ExpressionNode {
+public class LiteralNode extends ExpressionNode {
 
   int value;
   private String type;
@@ -22,8 +20,4 @@ public class LiteralNode implements ExpressionNode {
   }
 
 
-  @Override
-  public TypeCheckResult accept(SemanticVisitor visitor) {
-    return null;
-  }
 }

src/main/java/ast/ProgramNode.java

@@ -6,7 +6,7 @@ import java.util.List;
 import bytecode.visitor.ProgramVisitor;
 import semantic.SemanticVisitor;
 import typechecker.TypeCheckResult;
-import visitor.Visitable;
+import typechecker.Visitable;
 
 public class ProgramNode implements ASTNode, Visitable{
     public List<ClassNode> classes = new ArrayList<>();

src/main/java/ast/VarNode.java

@@ -1,10 +1,6 @@
 package ast;
 
-import semantic.SemanticVisitor;
-import typechecker.TypeCheckResult;
-import visitor.Visitable;
-
-public class VarNode implements ASTNode, Visitable {
+public class VarNode implements ASTNode{
 
   private String identifier;
   private String type;
@@ -22,8 +18,4 @@ public class VarNode implements ASTNode, Visitable {
     return identifier;
   }
 
-  @Override
-  public TypeCheckResult accept(SemanticVisitor visitor) {
-    return visitor.analyze(this);
-  }
 }

src/main/java/ast/expression/BinaryExpressionNode.java

@@ -1,10 +1,6 @@
 package ast.expression;
 
-import semantic.SemanticVisitor;
-import typechecker.TypeCheckResult;
-import visitor.Visitable;
-
-public class BinaryExpressionNode implements ExpressionNode, Visitable {
+public class BinaryExpressionNode extends ExpressionNode {
     public ExpressionNode left;
     public ExpressionNode right;
     public String operator;  // Stores the operator as a string (e.g., "+", "-", "&&")
@@ -14,9 +10,4 @@ public class BinaryExpressionNode implements ExpressionNode, Visitable {
         this.right = right;
         this.operator = operator;
     }
-
-    @Override
-    public TypeCheckResult accept(SemanticVisitor visitor) {
-        return visitor.analyze(this);
-    }
 }

src/main/java/ast/expression/ExpressionNode.java

@@ -1,8 +1,9 @@
 package ast.expression;
 
 import ast.ASTNode;
-import visitor.Visitable;
 
-public interface ExpressionNode extends ASTNode, Visitable {
+public class ExpressionNode implements ASTNode {
+
+
 
 }

src/main/java/ast/expression/IdentifierExpressionNode.java

@@ -1,22 +1,9 @@
 package ast.expression;
 
-import ast.type.TypeNode;
-import semantic.SemanticVisitor;
-
-import typechecker.TypeCheckResult;
-import visitor.Visitable;
-
-public class IdentifierExpressionNode implements ExpressionNode, Visitable {
+public class IdentifierExpressionNode extends ExpressionNode {
     public String name;
-    public TypeNode type;
-
 
     public IdentifierExpressionNode(String name) {
         this.name = name;
     }
-
-    @Override
-    public TypeCheckResult accept(SemanticVisitor visitor) {
-        return visitor.analyze(this);
-    }
 }

src/main/java/ast/expression/UnaryExpressionNode.java

@@ -1,10 +1,6 @@
 package ast.expression;
 
-import semantic.SemanticVisitor;
-import typechecker.TypeCheckResult;
-import visitor.Visitable;
-
-public class UnaryExpressionNode implements ExpressionNode, Visitable {
+public class UnaryExpressionNode extends ExpressionNode {
     public ExpressionNode expression;
     public String operator;  // Stores the operator (e.g., "-", "!")
 
@@ -12,9 +8,4 @@ public class UnaryExpressionNode implements ExpressionNode, Visitable {
         this.expression = expression;
         this.operator = operator;
     }
-
-    @Override
-    public TypeCheckResult accept(SemanticVisitor visitor) {
-        return visitor.analyze(this);
-    }
 }

src/main/java/ast/member/ConstructorNode.java

@@ -2,7 +2,7 @@ package ast.member;
 
 import ast.type.AccessTypeNode;
 import bytecode.visitor.MethodVisitor;
-import visitor.Visitable;
+import typechecker.Visitable;
 
 public class ConstructorNode extends MethodNode implements Visitable {
     public ConstructorNode(AccessTypeNode visibility, String name) {

src/main/java/ast/member/FieldNode.java

@@ -5,7 +5,7 @@ import ast.type.TypeNode;
 import bytecode.visitor.ClassVisitor;
 import semantic.SemanticVisitor;
 import typechecker.TypeCheckResult;
-import visitor.Visitable;
+import typechecker.Visitable;
 
 public class FieldNode implements MemberNode, Visitable {
     public AccessTypeNode accessTypeNode;

src/main/java/ast/member/MethodNode.java

@@ -3,15 +3,15 @@ package ast.member;
 import ast.parameter.ParameterListNode;
 import ast.statement.StatementNode;
 import ast.type.AccessTypeNode;
+import ast.type.TypeNode;
 
 import java.util.ArrayList;
 import java.util.List;
 
-import ast.type.TypeNode;
 import bytecode.visitor.MethodVisitor;
 import semantic.SemanticVisitor;
 import typechecker.TypeCheckResult;
-import visitor.Visitable;
+import typechecker.Visitable;
 
 public class MethodNode implements MemberNode, Visitable {
     public AccessTypeNode visibility;

src/main/java/ast/parameter/ParameterListNode.java

@@ -6,7 +6,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class ParameterListNode implements ASTNode {
-    public List<ParameterNode> parameters = new ArrayList<>();
+    List<ParameterNode> parameters = new ArrayList<>();
 
     public ParameterListNode(List<ParameterNode> parameters){
         this.parameters = parameters;

src/main/java/ast/statement/AssignmentStatementNode.java

@@ -4,7 +4,7 @@ import ast.VarNode;
 import ast.expression.ExpressionNode;
 import semantic.SemanticVisitor;
 import typechecker.TypeCheckResult;
-import visitor.Visitable;
+import typechecker.Visitable;
 
 public class AssignmentStatementNode extends StatementNode implements Visitable {
   public VarNode varNode;

src/main/java/ast/statement/IfStatementNode.java

@@ -1,8 +1,6 @@
 package ast.statement;
 
 import ast.expression.ExpressionNode;
-import semantic.SemanticVisitor;
-import typechecker.TypeCheckResult;
 
 public class IfStatementNode extends StatementNode {
     public ExpressionNode condition;
@@ -14,9 +12,4 @@ public class IfStatementNode extends StatementNode {
         this.thenStatement = thenStatement;
         this.elseStatement = elseStatement;
     }
-
-    @Override
-    public TypeCheckResult accept(SemanticVisitor visitor) {
-        return visitor.analyze(this);
-    }
 }

src/main/java/ast/statement/ReturnStatementNode.java

@@ -1,8 +1,6 @@
 package ast.statement;
 
 import ast.expression.ExpressionNode;
-import semantic.SemanticVisitor;
-import typechecker.TypeCheckResult;
 
 public class ReturnStatementNode extends StatementNode {
     public ExpressionNode expression;
@@ -10,9 +8,4 @@ public class ReturnStatementNode extends StatementNode {
     public ReturnStatementNode(ExpressionNode expression) {
         this.expression = expression;
     }
-
-    @Override
-    public TypeCheckResult accept(SemanticVisitor visitor) {
-        return visitor.analyze(this);
-    }
 }

src/main/java/ast/statement/StatementNode.java

@@ -1,8 +1,7 @@
 package ast.statement;
 
 import ast.ASTNode;
-import visitor.Visitable;
 
-public abstract class StatementNode implements ASTNode, Visitable {
+public abstract class StatementNode implements ASTNode {
 }
 

src/main/java/ast/statement/VariableDeclarationStatementNode.java

@@ -1,9 +1,7 @@
 package ast.statement;
 
-import ast.expression.ExpressionNode;
 import ast.type.TypeNode;
-import semantic.SemanticVisitor;
-import typechecker.TypeCheckResult;
+import ast.expression.ExpressionNode;
 
 public class VariableDeclarationStatementNode extends StatementNode {
     public TypeNode type;
@@ -14,9 +12,4 @@ public class VariableDeclarationStatementNode extends StatementNode {
         this.identifier = identifier;
         this.expression = expression;
     }
-
-    @Override
-    public TypeCheckResult accept(SemanticVisitor visitor) {
-        return visitor.analyze(this);
-    }
 }

src/main/java/ast/statement/WhileStatementNode.java

@@ -1,8 +1,6 @@
 package ast.statement;
 
 import ast.expression.ExpressionNode;
-import semantic.SemanticVisitor;
-import typechecker.TypeCheckResult;
 
 public class WhileStatementNode extends StatementNode {
     public ExpressionNode condition;
@@ -12,9 +10,4 @@ public class WhileStatementNode extends StatementNode {
         this.condition = condition;
         this.body = body;
     }
-
-    @Override
-    public TypeCheckResult accept(SemanticVisitor visitor) {
-        return visitor.analyze(this);
-    }
 }

src/main/java/ast/type/BaseTypeNode.java

@@ -1,8 +1,6 @@
 package ast.type;
 
-import ast.ASTNode;
-
-public class BaseTypeNode implements ASTNode, TypeNode {
+public class BaseTypeNode implements TypeNode{
 
     public EnumTypeNode enumType;
 

src/main/java/ast/type/ReferenceTypeNode.java

@@ -1,6 +1,4 @@
 package ast.type;
 
-import ast.ASTNode;
-
-public class ReferenceTypeNode implements ASTNode, TypeNode {
+public class ReferenceTypeNode implements TypeNode{
 }

src/main/java/bytecode/ClassCodeGen.java

@@ -4,7 +4,6 @@ import ast.ClassNode;
 import ast.member.FieldNode;
 import ast.member.MemberNode;
 import ast.member.MethodNode;
-import ast.type.BaseTypeNode;
 import bytecode.visitor.ClassVisitor;
 import java.io.File;
 import org.objectweb.asm.ClassWriter;
@@ -13,19 +12,14 @@ import org.objectweb.asm.Opcodes;
 import java.io.FileOutputStream;
 import java.io.IOException;
 
-
 public class ClassCodeGen implements ClassVisitor {
-    private Mapper mapper;
-    private ClassWriter classWriter;
-
-    public ClassCodeGen() {
-        mapper = new Mapper();
-    }
+    Mapper mapper = new Mapper();
+    ClassWriter classWriter;
 
     @Override
     public void visit(ClassNode classNode) {
         classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
-        classWriter.visit(Opcodes.V1_5, mapper.mapAccessTypeToOpcode(classNode.accessType), classNode.identifier, null,
+        classWriter.visit(Opcodes.V1_8, mapper.mapAccesTypeToOpcode(classNode.accessType), classNode.identifier, null,
                 "java/lang/Object", null);
 
         for (MemberNode memberNode : classNode.members) {
@@ -45,9 +39,7 @@ public class ClassCodeGen implements ClassVisitor {
 
     @Override
     public void visit(FieldNode fieldNode) {
-        if(fieldNode.type instanceof BaseTypeNode baseTypeNode){
-            classWriter.visitField(mapper.mapAccessTypeToOpcode(fieldNode.accessTypeNode), fieldNode.identifier, mapper.getTypeChar(baseTypeNode.enumType), null, null );
-        }
+        classWriter.visitField(mapper.mapAccesTypeToOpcode(fieldNode.accessTypeNode), fieldNode.identifier, mapper.getTypeChar(fieldNode.type.enumTypeNode), null, null );
         classWriter.visitEnd();
     }
 

src/main/java/bytecode/FieldCodeGen.java

@@ -0,0 +1,13 @@
+package bytecode;
+
+import ast.member.FieldNode;
+import org.objectweb.asm.ClassWriter;
+import org.objectweb.asm.FieldVisitor;
+
+public class FieldCodeGen {
+
+    public void generateFieldCode(ClassWriter classWriter, FieldNode fieldNode) {
+        Mapper mapper = new Mapper();
+        FieldVisitor fieldVisitor = classWriter.visitField(mapper.mapAccesTypeToOpcode(fieldNode.accessTypeNode), fieldNode.identifier, "", null, null);
+    }
+}

src/main/java/bytecode/Mapper.java

@@ -1,13 +1,13 @@
 package bytecode;
 
-import ast.parameter.ParameterListNode;
-import ast.parameter.ParameterNode;
-import ast.type.*;
+import ast.type.AccessTypeNode;
+import ast.type.EnumAccessTypeNode;
+import ast.type.EnumTypeNode;
+import ast.type.TypeNode;
 import org.objectweb.asm.Opcodes;
-import ast.type.BaseTypeNode;
 
 public class Mapper {
-    public int mapAccessTypeToOpcode(AccessTypeNode type) {
+    public int mapAccesTypeToOpcode(AccessTypeNode type) {
         switch (type.enumAccessTypeNode) {
             case EnumAccessTypeNode.PUBLIC:
                 return Opcodes.ACC_PUBLIC;
@@ -17,13 +17,9 @@ public class Mapper {
         return 0;
     }
 
-    public String generateMethodDescriptor(BaseTypeNode baseTypeNode, ParameterListNode parameterListNode) {
-        String descriptor = "(";
-        for(ParameterNode parameterNode : parameterListNode.parameters) {
-            descriptor += getTypeChar(EnumTypeNode.INT);
-        }
-        descriptor += ")";
-        descriptor += getTypeChar(baseTypeNode.enumType);
+    public String generateMethodDescriptor(TypeNode typeNode) {
+        String descriptor = "()";
+        descriptor += getTypeChar(typeNode.enumTypeNode);
         return descriptor;
     }
 

src/main/java/bytecode/MethodCodeGen.java

@@ -2,99 +2,37 @@ package bytecode;
 
 import ast.member.ConstructorNode;
 import ast.member.MethodNode;
-import ast.parameter.ParameterListNode;
-import ast.parameter.ParameterNode;
-import ast.type.BaseTypeNode;
-import ast.type.EnumTypeNode;
 import org.objectweb.asm.ClassWriter;
-import org.objectweb.asm.Label;
 import org.objectweb.asm.MethodVisitor;
-import org.objectweb.asm.Opcodes;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import static org.objectweb.asm.Opcodes.*;
-
 
 public class MethodCodeGen implements bytecode.visitor.MethodVisitor {
 
     private ClassWriter classWriter;
-    private Mapper mapper;
-    private MethodVisitor methodVisitor;
-
-    private List<String> localVaribales;
+    Mapper mapper = new Mapper();
 
     public MethodCodeGen(ClassWriter classWriter) {
         this.classWriter = classWriter;
-        mapper = new Mapper();
-        localVaribales = new ArrayList<>();
     }
 
     @Override
     public void visit(ConstructorNode constructorNode) {
-        methodVisitor =
-                classWriter.visitMethod(mapper.mapAccessTypeToOpcode(constructorNode.visibility),
+        MethodVisitor constructor =
+                classWriter.visitMethod(mapper.mapAccesTypeToOpcode(constructorNode.visibility),
                         "<init>",
                         "()V",
                         null,
                         null);
-        methodVisitor.visitCode();
-        methodVisitor.visitVarInsn(ALOAD, 0);
-        methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
-        methodVisitor.visitInsn(RETURN);
-        methodVisitor.visitMaxs(1, 1);
-        methodVisitor.visitEnd();
+        constructor.visitEnd();
     }
 
     @Override
     public void visit(MethodNode methodNode) {
-        if (methodNode.type instanceof BaseTypeNode baseTypeNode) {
-            methodVisitor = classWriter.visitMethod(mapper.mapAccessTypeToOpcode(methodNode.visibility),
+        MethodVisitor method = classWriter.visitMethod(mapper.mapAccesTypeToOpcode(methodNode.visibility),
                 methodNode.identifier,
-                    mapper.generateMethodDescriptor(baseTypeNode, methodNode.parameters),
+                mapper.generateMethodDescriptor(methodNode.type),
                 null,
                 null);
 
-            methodVisitor.visitCode();
-            localVaribales.add("this");
-            for (ParameterNode parameterNode : methodNode.parameters.parameters) {
-                localVaribales.add(parameterNode.identifier);
-            }
-
-            //test();
-            methodVisitor.visitMaxs(1, localVaribales.size());
-            methodVisitor.visitEnd();
-        }
-    }
-
-    public void test() {
-        Label start = new Label();
-        Label loop = new Label();
-        Label end = new Label();
-        methodVisitor.visitLabel(start);
-        //methodVisitor.visitVarInsn(Opcodes.ICONST_M1, 99);
-        //methodVisitor.visitInsn(Opcodes.ICONST_5);
-        methodVisitor.visitLdcInsn(99);
-        // methodVisitor.visitInsn(Opcodes.ICONST_0);
-        //methodVisitor.visitVarInsn(Opcodes.ILOAD, 2);
-        methodVisitor.visitVarInsn(Opcodes.ISTORE, 1);
-        methodVisitor.visitLabel(loop);
-        methodVisitor.visitVarInsn(Opcodes.ILOAD, 1);
-        methodVisitor.visitInsn(Opcodes.ICONST_5);
-        methodVisitor.visitJumpInsn(Opcodes.IF_ICMPGE, end);
-        methodVisitor.visitFieldInsn(Opcodes.GETSTATIC,
-                "java/lang/System", "out",
-                "Ljava/io/PrintStream;");
-        methodVisitor.visitLdcInsn("Bytecode");
-        methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL,
-                "java/io/PrintStream", "println",
-                "(Ljava/lang/String;)V", false);
-        methodVisitor.visitIincInsn(1, 1);
-        methodVisitor.visitJumpInsn(Opcodes.GOTO, loop);
-        methodVisitor.visitLabel(end);
-        methodVisitor.visitVarInsn(Opcodes.ILOAD, 1);
-        methodVisitor.visitInsn(Opcodes.IRETURN);
-        methodVisitor.visitEnd();
+        method.visitEnd();
     }
 }

src/main/java/parser/ASTBuilder.java

@@ -13,12 +13,10 @@ import ast.parameter.ParameterNode;
 import ast.statement.*;
 import ast.type.*;
 import org.antlr.v4.runtime.tree.TerminalNode;
-
 import java.util.ArrayList;
 import java.util.List;
 import parser.generated.*;
 import parser.generated.SimpleJavaParser.LiteralContext;
-import ast.type.BaseTypeNode;
 
 public class ASTBuilder extends SimpleJavaBaseVisitor<ASTNode> {
     @Override
@@ -76,9 +74,9 @@ public class ASTBuilder extends SimpleJavaBaseVisitor<ASTNode> {
 
     @Override
     public ASTNode visitParameter(SimpleJavaParser.ParameterContext ctx) {
-        TypeNode typeNode = (TypeNode) visit(ctx.type());
+        TypeNode type = (TypeNode) visit(ctx.type());
         String identifier = ctx.IDENTIFIER().getText();
-        return new ParameterNode(typeNode, identifier);
+        return new ParameterNode(type, identifier);
     }
 
     @Override
@@ -206,7 +204,6 @@ public class ASTBuilder extends SimpleJavaBaseVisitor<ASTNode> {
         try {
             int intValue = Integer.parseInt(literalContext.getText());
             LiteralNode literalNode = new LiteralNode(intValue);
-
             literalNode.setType("int");
             return literalNode;
         } catch (NumberFormatException ignored) {}

src/main/java/semantic/Scope.java

@@ -1,36 +0,0 @@
-package semantic;
-
-import ast.type.TypeNode;
-
-import java.util.HashMap;
-import java.util.Stack;
-
-public class Scope {
-
-    private Stack<HashMap<String, TypeNode>> localVars;
-
-    public void addLocalVar(String name, TypeNode type) {
-        if (this.contains(name)) {
-            throw new RuntimeException("Variable " + name + " already exists in this scope");
-        }
-        localVars.peek().put(name, type);
-    }
-
-    public boolean contains(String name) {
-        for (HashMap<String, TypeNode> map : localVars) {
-            if (map.containsKey(name)) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    public void pushScope() {
-        localVars.push(new HashMap<String, TypeNode>());
-    }
-
-    public void popScope() {
-        localVars.pop();
-    }
-
-}

src/main/java/semantic/SemanticAnalyzer.java

@@ -2,26 +2,22 @@ package semantic;
 
 
 import ast.*;
-import ast.expression.BinaryExpressionNode;
-import ast.expression.IdentifierExpressionNode;
-import ast.expression.UnaryExpressionNode;
+import ast.expression.ExpressionNode;
+import ast.member.ConstructorNode;
 import ast.member.FieldNode;
 import ast.member.MemberNode;
 
 import ast.member.MethodNode;
-import ast.statement.*;
-
+import ast.statement.AssignmentStatementNode;
+import ast.statement.StatementNode;
 import java.util.ArrayList;
 import java.util.List;
-
 import typechecker.TypeCheckResult;
 
 public class SemanticAnalyzer implements SemanticVisitor {
 
   private ArrayList<String> currentFields = new ArrayList<>();
 
-    private Scope currentScope;
-
   public static ASTNode generateTast(ASTNode node) throws RuntimeException {
     SemanticAnalyzer semanticCheck = new SemanticAnalyzer();
     ProgramNode programNode = (ProgramNode) node;
@@ -40,47 +36,34 @@ public class SemanticAnalyzer implements SemanticVisitor {
 
     List<ClassNode> classes = node.classes;
     for (ClassNode classNode : classes) {
-            var result = classNode.accept(this);
-            valid = valid && result.isValid();
+      classNode.accept(this);
     }
     return new TypeCheckResult(valid, null);
   }
 
   @Override
   public TypeCheckResult analyze(ClassNode classNode) {
-        var valid = true;
     List<MemberNode> members = classNode.members;
     for (MemberNode memberNode : members) {
       if (memberNode instanceof FieldNode fieldNode) {
-                var result = fieldNode.accept(this);
-                valid = valid && result.isValid();
+        fieldNode.accept(this);
       } else if (memberNode instanceof MethodNode methodNode) {
-                var result = methodNode.accept(this);
-                valid = valid && result.isValid();
+        methodNode.accept(this);
       }
     }
 
-        return new TypeCheckResult(valid, null);
-
+    return null;
   }
 
   @Override
   public TypeCheckResult analyze(MethodNode methodNode) {
-        var valid = true;
-
-        currentLocalScope.pushScope();
-
     List<StatementNode> statements = methodNode.statements;
     for (StatementNode statement : statements) {
       if(statement instanceof AssignmentStatementNode assignmentStatementNode) {
-                var result = assignmentStatementNode.accept(this);
-                valid = valid && result.isValid();
-            } else if (statement instanceof VariableDeclarationStatementNode variableDeclarationStatementNode) {
-                var result = variableDeclarationStatementNode.accept(this);
-                valid = valid && result.isValid();
+        assignmentStatementNode.accept(this);
       }
     }
-        return new TypeCheckResult(valid, null);
+    return null;
   }
 
   @Override
@@ -90,56 +73,19 @@ public class SemanticAnalyzer implements SemanticVisitor {
     }else {
       currentFields.add(toCheck.identifier);
     }
-        return new TypeCheckResult(true, null);
+    return null;
   }
 
   @Override
   public TypeCheckResult analyze(AssignmentStatementNode assignmentStatementNode) {
     if(assignmentStatementNode.expression instanceof LiteralNode literalNode) {
-            TypeCheckResult varResult = assignmentStatementNode.varNode.accept(this);
-            TypeCheckResult expressionResult = assignmentStatementNode.expression.accept(this);
+      VarNode varNode = assignmentStatementNode.varNode;
+      if(varNode.getType().equals(literalNode.getType())) {
+        System.out.println("Type is same");
+      } else {
+        throw new RuntimeException("Type mismatch");
       }
-        return new TypeCheckResult(true, null);
     }
-
-    @Override
-    public TypeCheckResult analyze(VarNode toCheck) {
-        return new TypeCheckResult(true, null);
-    }
-
-    @Override
-    public TypeCheckResult analyze(BinaryExpressionNode toCheck) {
-        return null;
-    }
-
-    @Override
-    public TypeCheckResult analyze(IdentifierExpressionNode toCheck) {
-        return null;
-    }
-
-    @Override
-    public TypeCheckResult analyze(UnaryExpressionNode toCheck) {
-        return null;
-    }
-
-    @Override
-    public TypeCheckResult analyze(VariableDeclarationStatementNode toCheck) {
-
-        return new TypeCheckResult(true, null);
-    }
-
-    @Override
-    public TypeCheckResult analyze(IfStatementNode toCheck) {
-        return null;
-    }
-
-    @Override
-    public TypeCheckResult analyze(ReturnStatementNode toCheck) {
-        return null;
-    }
-
-    @Override
-    public TypeCheckResult analyze(WhileStatementNode toCheck) {
     return null;
   }
 

src/main/java/semantic/SemanticVisitor.java

@@ -3,16 +3,13 @@ package semantic;
 
 import ast.ClassNode;
 import ast.ProgramNode;
-import ast.VarNode;
-import ast.expression.BinaryExpressionNode;
-import ast.expression.IdentifierExpressionNode;
-import ast.expression.UnaryExpressionNode;
 import ast.member.FieldNode;
 import ast.member.MethodNode;
-import ast.statement.*;
+import ast.statement.AssignmentStatementNode;
 import typechecker.TypeCheckResult;
 
 public interface SemanticVisitor {
+//    TypeCheckResult typeCheck(ASTNode toCheck);
 
     TypeCheckResult analyze(ProgramNode toCheck);
 
@@ -23,20 +20,43 @@ public interface SemanticVisitor {
     TypeCheckResult analyze(FieldNode toCheck);
 
     TypeCheckResult analyze(AssignmentStatementNode toCheck);
+//
+//    TypeCheckResult typeCheck(MethodParameter toCheck);
+//
+//    TypeCheckResult typeCheck(ForStmt forStmt);
+//
+//    TypeCheckResult typeCheck(WhileStmt whileStmt);
+//
+//    TypeCheckResult typeCheck(ReturnStmt returnStmt);
+//
+//    TypeCheckResult typeCheck(LocalVarDecl localVarDecl);
+//
+//    TypeCheckResult typeCheck(IfStmt ifStmt);
+//
+//    TypeCheckResult typeCheck(Block block);
+//
+//    TypeCheckResult typeCheck(NewDecl newDecl);
+//
+//    TypeCheckResult typeCheck(MethodCall methodCall);
+//
+//    TypeCheckResult typeCheck(Unary unary);
+//
+//    TypeCheckResult typeCheck(This aThis);
+//
+//    TypeCheckResult typeCheck(Null aNull);
+//
+//    TypeCheckResult typeCheck(LocalOrFieldVar localOrFieldVar);
+//
+//    TypeCheckResult typeCheck(IntegerExpr integerExpr);
+//
+//    TypeCheckResult typeCheck(InstVar instVar);
+//
+//    TypeCheckResult typeCheck(CharExpr charExpr);
+//
+//    TypeCheckResult typeCheck(BoolExpr boolExpr);
+//
+//    TypeCheckResult typeCheck(Binary binary);
+//
+//    TypeCheckResult typeCheck(StringExpr instVar);
 
-    TypeCheckResult analyze(VarNode toCheck);
-
-    TypeCheckResult analyze(BinaryExpressionNode toCheck);
-
-    TypeCheckResult analyze(IdentifierExpressionNode toCheck);
-
-    TypeCheckResult analyze(UnaryExpressionNode toCheck);
-
-    TypeCheckResult analyze(VariableDeclarationStatementNode toCheck);
-
-    TypeCheckResult analyze(IfStatementNode toCheck);
-
-    TypeCheckResult analyze(ReturnStatementNode toCheck);
-
-    TypeCheckResult analyze(WhileStatementNode toCheck);
 }

src/main/java/typechecker/Type.java

@@ -0,0 +1,5 @@
+package typechecker;
+
+public interface Type {
+    boolean equals(Object obj);
+}

src/main/java/typechecker/TypeCheckResult.java

@@ -1,14 +1,12 @@
 package typechecker;
 
 
-import ast.type.TypeNode;
-
 public class TypeCheckResult {
 
   private boolean valid;
-  private TypeNode type;
+  private Type type;
 
-  public TypeCheckResult(boolean valid, TypeNode type) {
+  public TypeCheckResult(boolean valid, Type type) {
     this.valid = valid;
     this.type = type;
   }
@@ -17,7 +15,7 @@ public class TypeCheckResult {
     return valid;
   }
 
-  public TypeNode getType() {
+  public Type getType() {
     return type;
   }
 }

src/main/java/typechecker/Typer.java

@@ -0,0 +1,9 @@
+package typechecker;
+
+public class Typer {
+
+    public static void Typeify(){
+
+    }
+
+}

src/main/java/typechecker/Visitable.java

@@ -1,10 +1,9 @@
-package visitor;
+package typechecker;
 
 import bytecode.visitor.ClassVisitor;
 import bytecode.visitor.MethodVisitor;
 import bytecode.visitor.ProgramVisitor;
 import semantic.SemanticVisitor;
-import typechecker.TypeCheckResult;
 
 public interface Visitable {
     default void accept(ProgramVisitor programVisitor) {