Evaluate: Implement evaluation for enums.

src/main/java/de/hsrm/compiler/Klang/types/BooleanType.java

@@ -1,5 +1,7 @@
 package de.hsrm.compiler.Klang.types;
 
+import de.hsrm.compiler.Klang.Value;
+
 public class BooleanType extends PrimitiveType {
 
   private static BooleanType instance = null;
@@ -33,4 +35,8 @@ public class BooleanType extends PrimitiveType {
     throw new RuntimeException("Type missmatch: cannot combine " + this.getName() + " and " + that.getName());
   }
 
+  @Override
+  public boolean valuesEqual(Value a, Value b) {
+    return a.asBoolean() == b.asBoolean();
+  }
 }

src/main/java/de/hsrm/compiler/Klang/types/FloatType.java

@@ -1,5 +1,7 @@
 package de.hsrm.compiler.Klang.types;
 
+import de.hsrm.compiler.Klang.Value;
+
 public class FloatType extends NumericType {
 
   private static FloatType instance = null;
@@ -37,4 +39,8 @@ public class FloatType extends NumericType {
     throw new RuntimeException("Type missmatch: cannot combine " + this.getName() + " and " + that.getName());
   }
 
+  @Override
+  public boolean valuesEqual(Value a, Value b) {
+    return a.asFloat() == b.asFloat();
+  }
 }

src/main/java/de/hsrm/compiler/Klang/types/IntegerType.java

@@ -1,5 +1,7 @@
 package de.hsrm.compiler.Klang.types;
 
+import de.hsrm.compiler.Klang.Value;
+
 public class IntegerType extends NumericType {
 
   private static IntegerType instance = null;
@@ -37,4 +39,9 @@ public class IntegerType extends NumericType {
     throw new RuntimeException("Type missmatch: cannot combine " + this.getName() + " and " + that.getName());
   }
 
+  @Override
+  public boolean valuesEqual(Value a, Value b) {
+    return a.asInteger() == b.asInteger();
+  }
+
 }

src/main/java/de/hsrm/compiler/Klang/types/NamedType.java

@@ -1,5 +1,12 @@
 package de.hsrm.compiler.Klang.types;
 
+import de.hsrm.compiler.Klang.Value;
+import de.hsrm.compiler.Klang.nodes.EnumDefinition;
+import de.hsrm.compiler.Klang.nodes.FunctionDefinition;
+import de.hsrm.compiler.Klang.nodes.StructDefinition;
+
+import java.util.Map;
+
 public class NamedType extends Type {
     public String name;
 
@@ -21,6 +28,11 @@ public class NamedType extends Type {
         throw new RuntimeException("Type mismatch: cannot combine " + getName() + " and " + that.getName());
     }
 
+    @Override
+    public boolean valuesEqual(Value a, Value b) {
+        return a.asObject().equals(b.asObject());
+    }
+
     @Override
     public boolean isPrimitiveType() {
         return false;

src/main/java/de/hsrm/compiler/Klang/types/NullType.java

@@ -1,5 +1,7 @@
 package de.hsrm.compiler.Klang.types;
 
+import de.hsrm.compiler.Klang.Value;
+
 public class NullType extends Type {
 
     private static NullType instance = null;
@@ -28,6 +30,11 @@ public class NullType extends Type {
         return that;
     }
 
+    @Override
+    public boolean valuesEqual(Value a, Value b) {
+        return a.asObject() == b.asObject();
+    }
+
     @Override
     public boolean isPrimitiveType() {
         return false;

src/main/java/de/hsrm/compiler/Klang/types/Type.java

@@ -1,6 +1,11 @@
 package de.hsrm.compiler.Klang.types;
 
-import java.util.Set;
+import de.hsrm.compiler.Klang.Value;
+import de.hsrm.compiler.Klang.nodes.EnumDefinition;
+import de.hsrm.compiler.Klang.nodes.FunctionDefinition;
+import de.hsrm.compiler.Klang.nodes.StructDefinition;
+
+import java.util.Map;
 
 public abstract class Type {
 
@@ -34,6 +39,7 @@ public abstract class Type {
 
   public abstract String getName();
   public abstract Type combine(Type that);
+  public abstract boolean valuesEqual(Value a, Value b);
   public abstract boolean isPrimitiveType();
   public abstract boolean isNumericType();
 }

src/main/java/de/hsrm/compiler/Klang/visitors/EvalVisitor.java

@@ -46,25 +46,11 @@ public class EvalVisitor implements Visitor<Value> {
 
   @Override
   public Value visit(EqualityExpression e) {
-    Value lhs = e.lhs.welcome(this);
-    Value rhs = e.rhs.welcome(this);
-    Type resultType = Type.getBooleanType();
-    Type combineType = lhs.type.combine(rhs.type);
+    var lhs = e.lhs.welcome(this);
+    var rhs = e.rhs.welcome(this);
+    var combinedType = lhs.type.combine(rhs.type);
 
-    switch(combineType.getName()) {
-      case "bool": {
-        return new Value(lhs.asBoolean() == rhs.asBoolean(), resultType);
-      }
-      case "int": {
-        return new Value(lhs.asInteger() == rhs.asInteger(), resultType);
-      }
-      case "float": {
-        return new Value(lhs.asFloat() == rhs.asFloat(), resultType);
-      }
-      default: {
-        return new Value(lhs.asObject() == rhs.asObject(), resultType);
-      }
-    }
+    return new Value(combinedType.valuesEqual(lhs, rhs), Type.getBooleanType());
   }
 
   @Override
@@ -498,7 +484,7 @@ public class EvalVisitor implements Visitor<Value> {
 
   @Override
   public Value visit(EnumAccessExpression e) {
-    return null;
+    return new Value(e.enumValueName, e.type);
   }
 
   @Override