Any.equals & Any.toString

compiler/backend/src/org/jetbrains/jet/codegen/ExpressionCodegen.java

@@ -1462,7 +1462,7 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> {
         return StackValue.onStack(Type.BOOLEAN_TYPE);
     }
 
-    private StackValue generateEqualsForExpressionsOnStack(IElementType opToken, Type leftType, Type rightType, boolean leftNullable, boolean rightNullable) {
+    public StackValue generateEqualsForExpressionsOnStack(IElementType opToken, Type leftType, Type rightType, boolean leftNullable, boolean rightNullable) {
         if (isNumberPrimitive(leftType) && leftType == rightType) {
             return compareExpressionsOnStack(opToken, leftType);
         }

compiler/backend/src/org/jetbrains/jet/codegen/JetTypeMapper.java

@@ -39,6 +39,7 @@ public class JetTypeMapper {
     public static final Type JL_BOOLEAN_TYPE = Type.getObjectType("java/lang/Boolean");
     public static final Type JL_NUMBER_TYPE = Type.getObjectType("java/lang/Number");
     public static final Type JL_STRING_BUILDER = Type.getObjectType("java/lang/StringBuilder");
+    public static final Type JL_STRING_TYPE = Type.getObjectType("java/lang/String");
 
     public static final Type ARRAY_INT_TYPE = Type.getType(int[].class);
     public static final Type ARRAY_LONG_TYPE = Type.getType(long[].class);

compiler/backend/src/org/jetbrains/jet/codegen/intrinsics/Equals.java

@@ -0,0 +1,43 @@
+package org.jetbrains.jet.codegen.intrinsics;
+
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.tree.IElementType;
+import org.jetbrains.jet.codegen.ExpressionCodegen;
+import org.jetbrains.jet.codegen.JetTypeMapper;
+import org.jetbrains.jet.codegen.StackValue;
+import org.jetbrains.jet.lang.psi.JetCallExpression;
+import org.jetbrains.jet.lang.psi.JetExpression;
+import org.jetbrains.jet.lang.resolve.BindingContext;
+import org.jetbrains.jet.lang.types.JetType;
+import org.jetbrains.jet.lexer.JetTokens;
+import org.objectweb.asm.Type;
+import org.objectweb.asm.commons.InstructionAdapter;
+
+import java.util.List;
+
+/**
+ * @author alex.tkachman
+ */
+public class Equals implements IntrinsicMethod {
+    @Override
+    public StackValue generate(ExpressionCodegen codegen, InstructionAdapter v, Type expectedType, PsiElement element, List<JetExpression> arguments, StackValue receiver) {
+        receiver.put(JetTypeMapper.TYPE_OBJECT, v);
+
+        boolean leftNullable = true;
+        if(element instanceof JetCallExpression) {
+            JetCallExpression jetCallExpression = (JetCallExpression) element;
+            JetExpression calleeExpression = jetCallExpression.getCalleeExpression();
+            if(calleeExpression != null) {
+                JetType leftType = codegen.getBindingContext().get(BindingContext.EXPRESSION_TYPE, calleeExpression);
+                if(leftType != null)
+                    leftNullable = leftType.isNullable();
+            }
+        }
+        
+        JetExpression rightExpr = arguments.get(0);
+        JetType rightType = codegen.getBindingContext().get(BindingContext.EXPRESSION_TYPE, rightExpr);
+        codegen.gen(rightExpr).put(JetTypeMapper.TYPE_OBJECT, v);
+
+        return codegen.generateEqualsForExpressionsOnStack(JetTokens.EQEQ, JetTypeMapper.TYPE_OBJECT, JetTypeMapper.TYPE_OBJECT, leftNullable, rightType.isNullable());
+    }
+}

compiler/backend/src/org/jetbrains/jet/codegen/intrinsics/IntrinsicMethods.java

@@ -73,6 +73,11 @@ public class IntrinsicMethods {
 
         declareIntrinsicFunction("String", "plus", 1, new Concat());
 
+        declareOverload(myStdLib.getLibraryScope().getFunctions("toString"), 0, new ToString());
+        declareOverload(myStdLib.getLibraryScope().getFunctions("equals"), 1, new Equals());
+
+//        declareIntrinsicFunction("Any", "equals", 1, new Equals());
+//
         declareIntrinsicStringMethods();
         declareIntrinsicProperty("String", "length", new StringLength());
 

compiler/backend/src/org/jetbrains/jet/codegen/intrinsics/ToString.java

@@ -0,0 +1,24 @@
+package org.jetbrains.jet.codegen.intrinsics;
+
+import com.intellij.psi.PsiElement;
+import org.jetbrains.jet.codegen.ExpressionCodegen;
+import org.jetbrains.jet.codegen.JetTypeMapper;
+import org.jetbrains.jet.codegen.StackValue;
+import org.jetbrains.jet.lang.psi.JetExpression;
+import org.jetbrains.jet.lang.types.JetStandardClasses;
+import org.objectweb.asm.Type;
+import org.objectweb.asm.commons.InstructionAdapter;
+
+import java.util.List;
+
+/**
+ * @author alex.tkachman
+ */
+public class ToString implements IntrinsicMethod {
+    @Override
+    public StackValue generate(ExpressionCodegen codegen, InstructionAdapter v, Type expectedType, PsiElement element, List<JetExpression> arguments, StackValue receiver) {
+        receiver.put(JetTypeMapper.TYPE_OBJECT, v);
+        v.invokestatic("java/lang/String", "valueOf", "(Ljava/lang/Object;)Ljava/lang/String;");
+        return StackValue.onStack(JetTypeMapper.JL_STRING_TYPE);
+    }
+}

compiler/tests/org/jetbrains/jet/codegen/FunctionGenTest.java

@@ -1,5 +1,8 @@
 package org.jetbrains.jet.codegen;
 
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
 /**
  * @author alex.tkachman
  */
@@ -13,4 +16,29 @@ public class FunctionGenTest extends CodegenTestCase {
         blackBoxFile("functions/nothisnoclosure.jet");
         System.out.println(generateToText());
     }
+
+    public void testAnyToString () throws InvocationTargetException, IllegalAccessException {
+        loadText("fun foo(x: Any) = x.toString()");
+        System.out.println(generateToText());
+        Method foo = generateFunction();
+        assertEquals("something", foo.invoke(null, "something"));
+        assertEquals("null", foo.invoke(null, new Object[]{null}));
+
+    }
+
+    public void testAnyEqualsNullable () throws InvocationTargetException, IllegalAccessException {
+        loadText("fun foo(x: Any?) = x.equals(\"lala\")");
+        System.out.println(generateToText());
+        Method foo = generateFunction();
+        assertTrue((Boolean) foo.invoke(null, "lala"));
+        assertFalse((Boolean) foo.invoke(null, "mama"));
+    }
+
+    public void testAnyEquals () throws InvocationTargetException, IllegalAccessException {
+        loadText("fun foo(x: Any) = x.equals(\"lala\")");
+        System.out.println(generateToText());
+        Method foo = generateFunction();
+        assertTrue((Boolean) foo.invoke(null, "lala"));
+        assertFalse((Boolean) foo.invoke(null, "mama"));
+    }
 }