Change String argument of property delegate method to PropertyMetadata

compiler/frontend/src/jet/Library.jet

@@ -64,3 +64,14 @@ public open class Throwable(message : String? = null, cause: Throwable? = null)
     public fun getCause() : Throwable?
     public fun printStackTrace() : Unit
 }
+
+public trait PropertyMetadata {
+    public val name: String
+}
+
+/*
+ * In front-end we need to resolve call PropertyMetadataImpl() in getter of delegated property
+ * to be able generate it in back-end using ExpressionCodegen.invokeFunction
+ */
+public class PropertyMetadataImpl(public override val name: String): PropertyMetadata
+

compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/DelegatedPropertyUtils.java

@@ -43,6 +43,7 @@ import org.jetbrains.jet.lang.types.DeferredType;
 import org.jetbrains.jet.lang.types.JetType;
 import org.jetbrains.jet.lang.types.TypeUtils;
 import org.jetbrains.jet.lang.types.checker.JetTypeChecker;
+import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
 
 import java.util.List;
 
@@ -136,9 +137,11 @@ public class DelegatedPropertyUtils {
 
         List<JetExpression> arguments = Lists.newArrayList();
         arguments.add(createExpression(project, hasThis ? "this" : "null"));
-        arguments.add(createExpression(project, "\"" + propertyDescriptor.getName().getName() + "\""));
+
+        arguments.add(createExpression(project, KotlinBuiltIns.getInstance().getPropertyMetadataImpl().getName().getName() + "(\"" + propertyDescriptor.getName().getName() + "\")"));
+
         if (!isGet) {
-            JetReferenceExpression fakeArgument = createFakeExpressionOfType(context.expressionTypingServices.getProject(), trace,
+            JetReferenceExpression fakeArgument = (JetReferenceExpression) createFakeExpressionOfType(context.expressionTypingServices.getProject(), trace,
                                                                              "fakeArgument" + arguments.size(),
                                                                              propertyDescriptor.getType());
             arguments.add(fakeArgument);

compiler/frontend/src/org/jetbrains/jet/lang/types/lang/KotlinBuiltIns.java

@@ -786,6 +786,16 @@ public class KotlinBuiltIns {
         return getBuiltInTypeByClassName("Annotation");
     }
 
+    @NotNull
+    public ClassDescriptor getPropertyMetadata() {
+        return getBuiltInClassByName("PropertyMetadata");
+    }
+
+    @NotNull
+    public ClassDescriptor getPropertyMetadataImpl() {
+        return getBuiltInClassByName("PropertyMetadataImpl");
+    }
+
     @NotNull
     public JetType getFunctionType(
             @NotNull List<AnnotationDescriptor> annotations,

compiler/testData/builtin-classes.txt

@@ -1356,6 +1356,15 @@ public trait Progression</*0*/ N : jet.Any> : jet.Iterable<N> {
     public abstract override /*1*/ /*fake_override*/ fun iterator(): jet.Iterator<N>
 }
 
+public trait PropertyMetadata {
+    public abstract val name: jet.String
+}
+
+public final class PropertyMetadataImpl : jet.PropertyMetadata {
+    public constructor PropertyMetadataImpl(/*0*/ name: jet.String)
+    public open override /*1*/ val name: jet.String
+}
+
 public trait Range</*0*/ in T : jet.Comparable<T>> {
     public abstract val end: T
     public abstract val start: T

compiler/testData/codegen/box/delegatedProperty/capturePropertyInClosure.kt

@@ -1,7 +1,7 @@
 class Delegate {
     var inner = 1
-    fun get(t: Any?, p: String): Int = inner
+    fun get(t: Any?, p: PropertyMetadata): Int = inner
-    fun set(t: Any?, p: String, i: Int) { inner = i }
+    fun set(t: Any?, p: PropertyMetadata, i: Int) { inner = i }
 }
 
 class B {

compiler/testData/codegen/box/delegatedProperty/castGetReturnType.kt

@@ -1,5 +1,5 @@
 class Delegate {
-    fun get(t: Any?, p: String): Int = 1
+    fun get(t: Any?, p: PropertyMetadata): Int = 1
 }
 
 class AImpl {

compiler/testData/codegen/box/delegatedProperty/castSetParameter.kt

@@ -1,10 +1,10 @@
 class Delegate {
     var inner = Derived()
-    fun get(t: Any?, p: String): Derived {
+    fun get(t: Any?, p: PropertyMetadata): Derived {
         inner = Derived(inner.a + "-get")
         return inner
     }
-    fun set(t: Any?, p: String, i: Base) { inner = Derived(inner.a + "-" + i.a + "-set") }
+    fun set(t: Any?, p: PropertyMetadata, i: Base) { inner = Derived(inner.a + "-" + i.a + "-set") }
 }
 
 class A {

compiler/testData/codegen/box/delegatedProperty/defaultArgs.kt

@@ -1,5 +1,5 @@
 class Delegate {
-    fun get(t: Any?, p: String, s: String = ""): Int = 1
+    fun get(t: Any?, p: PropertyMetadata, s: String = ""): Int = 1
 }
 
 val prop: Int by Delegate()

compiler/testData/codegen/box/delegatedProperty/delegateAsInnerClass.kt

@@ -3,8 +3,8 @@ class A {
 
     class Delegate {
         var inner = 1
-        fun get(t: Any?, p: String): Int = inner
+        fun get(t: Any?, p: PropertyMetadata): Int = inner
-        fun set(t: Any?, p: String, i: Int) { inner = i }
+        fun set(t: Any?, p: PropertyMetadata, i: Int) { inner = i }
     }
 }
 

compiler/testData/codegen/box/delegatedProperty/delegateByOtherProperty.kt

@@ -1,7 +1,7 @@
 class Delegate {
     var inner = 1
-    fun get(t: Any?, p: String): Int = inner
+    fun get(t: Any?, p: PropertyMetadata): Int = inner
-    fun set(t: Any?, p: String, i: Int) { inner = i }
+    fun set(t: Any?, p: PropertyMetadata, i: Int) { inner = i }
 }
 
 class A {

compiler/testData/codegen/box/delegatedProperty/delegateByTopLevelFun.kt

@@ -1,7 +1,7 @@
 class Delegate {
     var inner = 1
-    fun get(t: Any?, p: String): Int = inner
+    fun get(t: Any?, p: PropertyMetadata): Int = inner
-    fun set(t: Any?, p: String, i: Int) { inner = i }
+    fun set(t: Any?, p: PropertyMetadata, i: Int) { inner = i }
 }
 
 fun foo() = Delegate()

compiler/testData/codegen/box/delegatedProperty/delegateByTopLevelProperty.kt

@@ -1,7 +1,7 @@
 class Delegate {
     var inner = 1
-    fun get(t: Any?, p: String): Int = inner
+    fun get(t: Any?, p: PropertyMetadata): Int = inner
-    fun set(t: Any?, p: String, i: Int) { inner = i }
+    fun set(t: Any?, p: PropertyMetadata, i: Int) { inner = i }
 }
 
 val p = Delegate()

compiler/testData/codegen/box/delegatedProperty/delegateForExtProperty.kt

@@ -1,5 +1,5 @@
 class Delegate {
-  fun get(t: A, p: String): Int = 1
+  fun get(t: A, p: PropertyMetadata): Int = 1
 }
 
 val A.prop: Int by Delegate()

compiler/testData/codegen/box/delegatedProperty/delegateForExtPropertyInClass.kt

@@ -1,5 +1,5 @@
 class Delegate {
-    fun get(t: F.A, p: String): Int = 1
+    fun get(t: F.A, p: PropertyMetadata): Int = 1
 }
 
 class F {

compiler/testData/codegen/box/delegatedProperty/genericDelegate.kt

@@ -1,6 +1,6 @@
 class Delegate<T>(var inner: T) {
-    fun get(t: Any?, p: String): T = inner
+    fun get(t: Any?, p: PropertyMetadata): T = inner
-    fun set(t: Any?, p: String, i: T) { inner = i }
+    fun set(t: Any?, p: PropertyMetadata, i: T) { inner = i }
 }
 
 class A {

compiler/testData/codegen/box/delegatedProperty/getAsExtensionFun.kt

@@ -1,7 +1,7 @@
 class Delegate {
 }
 
-fun Delegate.get(t: Any?, p: String): Int = 1
+fun Delegate.get(t: Any?, p: PropertyMetadata): Int = 1
 
 class A {
     val prop: Int by Delegate()

compiler/testData/codegen/box/delegatedProperty/getAsExtensionFunInClass.kt

@@ -2,7 +2,7 @@ class Delegate {
 }
 
 class A {
-    fun Delegate.get(t: Any?, p: String): Int = 1
+    fun Delegate.get(t: Any?, p: PropertyMetadata): Int = 1
     val prop: Int by Delegate()
 }
 

compiler/testData/codegen/box/delegatedProperty/inClassVal.kt

@@ -1,5 +1,5 @@
 class Delegate {
-    fun get(t: Any?, p: String): Int = 1
+    fun get(t: Any?, p: PropertyMetadata): Int = 1
 }
 
 class A {

compiler/testData/codegen/box/delegatedProperty/inClassVar.kt

@@ -1,7 +1,7 @@
 class Delegate {
     var inner = 1
-    fun get(t: Any?, p: String): Int = inner
+    fun get(t: Any?, p: PropertyMetadata): Int = inner
-    fun set(t: Any?, p: String, i: Int) { inner = i }
+    fun set(t: Any?, p: PropertyMetadata, i: Int) { inner = i }
 }
 
 class A {

compiler/testData/codegen/box/delegatedProperty/inTrait.kt

@@ -1,5 +1,5 @@
 class Delegate {
-    fun get(t: Any?, p: String): Int = 1
+    fun get(t: Any?, p: PropertyMetadata): Int = 1
 }
 
 trait A {

compiler/testData/codegen/box/delegatedProperty/inferredPropertyType.kt

@@ -1,6 +1,6 @@
 class Delegate<T>(var inner: T) {
-    fun get(t: Any?, p: String): T = inner
+    fun get(t: Any?, p: PropertyMetadata): T = inner
-    fun set(t: Any?, p: String, i: T) { inner = i }
+    fun set(t: Any?, p: PropertyMetadata, i: T) { inner = i }
 }
 
 class A {

compiler/testData/codegen/box/delegatedProperty/privateVar.kt

@@ -1,7 +1,7 @@
 class Delegate {
    var inner = 1
-   fun get(t: Any?, p: String): Int = inner
+   fun get(t: Any?, p: PropertyMetadata): Int = inner
-   fun set(t: Any?, p: String, i: Int) { inner = i }
+   fun set(t: Any?, p: PropertyMetadata, i: Int) { inner = i }
 }
 
 class A {

compiler/testData/codegen/box/delegatedProperty/setAsExtensionFun.kt

@@ -1,9 +1,9 @@
 class Delegate {
     var inner = 1
-    fun get(t: Any?, p: String): Int = inner
+    fun get(t: Any?, p: PropertyMetadata): Int = inner
 }
 
-fun Delegate.set(t: Any?, p: String, i: Int) { inner = i }
+fun Delegate.set(t: Any?, p: PropertyMetadata, i: Int) { inner = i }
 
 class A {
     var prop: Int by Delegate()

compiler/testData/codegen/box/delegatedProperty/setAsExtensionFunInClass.kt

@@ -1,10 +1,10 @@
 class Delegate {
     var inner = 1
-    fun get(t: Any?, p: String): Int = inner
+    fun get(t: Any?, p: PropertyMetadata): Int = inner
 }
 
 class A {
-  fun Delegate.set(t: Any?, p: String, i: Int) { inner = i }
+  fun Delegate.set(t: Any?, p: PropertyMetadata, i: Int) { inner = i }
 
   var prop: Int by Delegate()
 }

compiler/testData/codegen/box/delegatedProperty/topLevelVal.kt

@@ -1,5 +1,5 @@
 class Delegate {
-    fun get(t: Any?, p: String): Int = 1
+    fun get(t: Any?, p: PropertyMetadata): Int = 1
 }
 
 val prop: Int by Delegate()

compiler/testData/codegen/box/delegatedProperty/topLevelVar.kt

@@ -1,7 +1,7 @@
 class Delegate {
     var inner = 1
-    fun get(t: Any?, p: String): Int = inner
+    fun get(t: Any?, p: PropertyMetadata): Int = inner
-    fun set(t: Any?, p: String, i: Int) { inner = i }
+    fun set(t: Any?, p: PropertyMetadata, i: Int) { inner = i }
 }
 
 var prop: Int by Delegate()

compiler/testData/codegen/box/delegatedProperty/twoPropByOneDelegete.kt

@@ -1,5 +1,5 @@
 class Delegate<T>(val f: (T) -> Int) {
-    fun get(t: T, p: String): Int = f(t)
+    fun get(t: T, p: PropertyMetadata): Int = f(t)
 }
 
 val p = Delegate<A> { t -> t.foo() }

compiler/testData/codegen/box/delegatedProperty/valInInnerClass.kt

@@ -1,5 +1,5 @@
 class Delegate {
-  fun get(t: Any?, p: String): Int = 1
+  fun get(t: Any?, p: PropertyMetadata): Int = 1
 }
 
 class A {

compiler/testData/codegen/box/delegatedProperty/varInInnerClass.kt

@@ -1,7 +1,7 @@
 class Delegate {
     var inner = 1
-    fun get(t: Any?, p: String): Int = inner
+    fun get(t: Any?, p: PropertyMetadata): Int = inner
-    fun set(t: Any?, p: String, i: Int) { inner = i }
+    fun set(t: Any?, p: PropertyMetadata, i: Int) { inner = i }
 }
 
 class A {

compiler/testData/codegen/box/delegatedProperty/vararg.kt

@@ -1,5 +1,5 @@
 class Delegate {
-    fun get(t: Any?, vararg p: String): Int = 1
+    fun get(t: Any?, vararg p: PropertyMetadata): Int = 1
 }
 
 val prop: Int by Delegate()

compiler/testData/diagnostics/tests/delegatedProperty/absentErrorAboutInitializer.kt

@@ -1,7 +1,7 @@
 val a: Int by Delegate()
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/absentErrorAboutType.kt

@@ -1,7 +1,7 @@
 val a by Delegate()
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/abstractDelegatedProperty.kt

@@ -3,7 +3,7 @@ abstract class A {
 }
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/backingField.kt

@@ -5,7 +5,7 @@ class B {
 }
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/delegatedPropertyOverridedInTrait.kt

@@ -11,7 +11,7 @@ fun foo() {
 }
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/delegatedPropertyOverridedInTraitTypeMismatch.kt

@@ -11,7 +11,7 @@ fun foo() {
 }
 
 class Delegate {
-    fun get(t: Any?, p: String): String {
+    fun get(t: Any?, p: PropertyMetadata): String {
         t.equals(p) // to avoid UNUSED_PARAMETER warning
         return ""
     }

compiler/testData/diagnostics/tests/delegatedProperty/genericGetter.kt

@@ -1,7 +1,7 @@
 val a: Int by A(1)
 
 class A<T: Any>(i: T) {
-  fun get(t: Any?, p: String): T {
+  fun get(t: Any?, p: PropertyMetadata): T {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     throw Exception()
   }

compiler/testData/diagnostics/tests/delegatedProperty/getterWithSubtype.kt

@@ -4,7 +4,7 @@ class Derived: Base()
 val a: Base by A()
 
 class A {
-  fun get(t: Any?, p: String): Derived {
+  fun get(t: Any?, p: PropertyMetadata): Derived {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return Derived()
   }

compiler/testData/diagnostics/tests/delegatedProperty/inTrait.kt

@@ -3,7 +3,7 @@ trait T {
 }
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/incompleteTypeInference.kt

@@ -7,7 +7,7 @@ class D {
 val cTopLevel: Int by <!DELEGATE_SPECIAL_FUNCTION_MISSING!>IncorrectThis<A>()<!>
 
 class IncorrectThis<T> {
-    fun get<R>(t: Any?, p: String): Int {
+    fun get<R>(t: Any?, p: PropertyMetadata): Int {
         t.equals(p) // to avoid UNUSED_PARAMETER warning
         return 1
     }

compiler/testData/diagnostics/tests/delegatedProperty/localVariable.kt

@@ -5,7 +5,7 @@ class Local {
 }
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/missedSetter.kt

@@ -1,7 +1,7 @@
 var a: Int by <!DELEGATE_SPECIAL_FUNCTION_MISSING!>A()<!>
 
 class A {
-    fun get(t: Any?, p: String): Int {
+    fun get(t: Any?, p: PropertyMetadata): Int {
       t.equals(p) // to avoid UNUSED_PARAMETER warning
       return 1
     }

compiler/testData/diagnostics/tests/delegatedProperty/propertyDefferedType.kt

@@ -3,7 +3,7 @@ class B {
 }
 
 class Delegate<T: Any>(val init: T) {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     throw Exception()
   }

compiler/testData/diagnostics/tests/delegatedProperty/publicDelegatedProperty.kt

@@ -1,7 +1,7 @@
 <!PUBLIC_MEMBER_SHOULD_SPECIFY_TYPE!>public val a<!> by Delegate()
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/recursiveType.kt

@@ -6,7 +6,7 @@ val c by <!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>d<!>
 val d by <!TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM!>c<!>
 
 class Delegate(i: Int) {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/redundantGetter.kt

@@ -2,7 +2,7 @@ val a: Int by Delegate()
   <!ACCESSOR_FOR_DELEGATED_PROPERTY!>get() = 1<!>
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/redundantSetter.kt

@@ -3,12 +3,12 @@ var a: Int by Delegate()
   <!ACCESSOR_FOR_DELEGATED_PROPERTY!>set(i) {}<!>
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 
-  fun set(t: Any?, p: String, i: Int) {
+  fun set(t: Any?, p: PropertyMetadata, i: Int) {
     t.equals(p) || i.equals(null)  // to avoid UNUSED_PARAMETER warning
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/setterThisTypeMismatch.kt

@@ -7,11 +7,11 @@ var cTopLevel: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 class A
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
-  fun set(t: A, p: String, i: Int) {
+  fun set(t: A, p: PropertyMetadata, i: Int) {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     i.equals(null)
   }

compiler/testData/diagnostics/tests/delegatedProperty/setterWithSupertype.kt

@@ -4,12 +4,12 @@ class Derived: Base()
 var a: Derived by A()
 
 class A {
-  fun get(t: Any?, p: String): Derived {
+  fun get(t: Any?, p: PropertyMetadata): Derived {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return Derived()
   }
 
-  fun set(t: Any?, p: String, i: Base) {
+  fun set(t: Any?, p: PropertyMetadata, i: Base) {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     i.equals(null) // to avoid UNUSED_PARAMETER warning
   }

compiler/testData/diagnostics/tests/delegatedProperty/thisInDelegate.kt

@@ -5,7 +5,7 @@ class A {
 }
 
 class Delegate(i: Int) {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/thisOfAnyType.kt

@@ -5,11 +5,11 @@ class A {
 var aTopLevel: Int by Delegate()
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
-  fun set(t: Any?, p: String, a: Int) {
+  fun set(t: Any?, p: PropertyMetadata, a: Int) {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     a.equals(null)
   }

compiler/testData/diagnostics/tests/delegatedProperty/thisOfNothingNullableType.kt

@@ -5,11 +5,11 @@ class A {
 var aTopLevel: Int by Delegate()
 
 class Delegate {
-  fun get(<!UNUSED_PARAMETER!>t<!>: Nothing?, p: String): Int {
+  fun get(<!UNUSED_PARAMETER!>t<!>: Nothing?, p: PropertyMetadata): Int {
     p.equals(null) // to avoid UNUSED_PARAMETER warning
     return 1
   }
-  fun set(<!UNUSED_PARAMETER!>t<!>: Nothing?, p: String, a: Int) {
+  fun set(<!UNUSED_PARAMETER!>t<!>: Nothing?, p: PropertyMetadata, a: Int) {
     p.equals(a) // to avoid UNUSED_PARAMETER warning
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/thisOfNothingType.kt

@@ -5,11 +5,11 @@ class A {
 var aTopLevel: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE, DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 
 class Delegate {
-  fun get(<!UNUSED_PARAMETER!>t<!>: Nothing, p: String): Int {
+  fun get(<!UNUSED_PARAMETER!>t<!>: Nothing, p: PropertyMetadata): Int {
     p.equals(null) // to avoid UNUSED_PARAMETER warning
     return 1
   }
-  fun set(<!UNUSED_PARAMETER!>t<!>: Nothing, p: String, a: Int) {
+  fun set(<!UNUSED_PARAMETER!>t<!>: Nothing, p: PropertyMetadata, a: Int) {
     p.equals(a) // to avoid UNUSED_PARAMETER warning
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/twoGetMethods.kt

@@ -3,12 +3,12 @@ class A {
 }
 
 class Delegate {
-    fun get(t: Int, p: String): Int {
+    fun get(t: Int, p: PropertyMetadata): Int {
         t.equals(p) // to avoid UNUSED_PARAMETER warning
         return 1
     }
 
-    fun get(t: String, p: String): Int {
+    fun get(t: String, p: PropertyMetadata): Int {
         t.equals(p) // to avoid UNUSED_PARAMETER warning
         return 1
     }

compiler/testData/diagnostics/tests/delegatedProperty/typeMismatchForGetReturnType.kt

@@ -1,7 +1,7 @@
 val c: Int by <!DELEGATE_SPECIAL_FUNCTION_RETURN_TYPE_MISMATCH!>Delegate()<!>
 
 class Delegate {
-  fun get(t: Any?, p: String): String {
+  fun get(t: Any?, p: PropertyMetadata): String {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return ""
   }

compiler/testData/diagnostics/tests/delegatedProperty/typeMismatchForGetWithGeneric.kt

@@ -13,7 +13,7 @@ class C {
 val cTopLevel: Int by Delegate<Nothing?>()
 
 class Delegate<T> {
-  fun get(t: T, p: String): Int {
+  fun get(t: T, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/typeMismatchForSetParameter.kt

@@ -5,11 +5,11 @@ class A {
 var aTopLevel: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
-  fun set(t: Any?, p: String, i: String) {
+  fun set(t: Any?, p: PropertyMetadata, i: String) {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     i.equals(null)
   }

compiler/testData/diagnostics/tests/delegatedProperty/typeMismatchForThisGetParameter.kt

@@ -7,7 +7,7 @@ val bTopLevel: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 class A
 
 class Delegate {
-  fun get(t: A, p: String): Int {
+  fun get(t: A, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }

compiler/testData/diagnostics/tests/delegatedProperty/wrongCountOfParametersInGet.kt

@@ -5,7 +5,7 @@ class A {
 val aTopLevel: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 
 class Delegate {
-  fun get(t: Any?, p: String, a: Int): Int {
+  fun get(t: Any?, p: PropertyMetadata, a: Int): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return a
   }

compiler/testData/diagnostics/tests/delegatedProperty/wrongCountOfParametersInSet.kt

@@ -5,12 +5,12 @@ class A {
 var aTopLevel: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 
 class Delegate {
-  fun get(t: Any?, p: String): Int {
+  fun get(t: Any?, p: PropertyMetadata): Int {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 
-  fun set(t: Any?, p: String, a: Int, c: Int) {
+  fun set(t: Any?, p: PropertyMetadata, a: Int, c: Int) {
     t.equals(p) // to avoid UNUSED_PARAMETER warning
     c.equals(a)
   }

compiler/testData/diagnostics/tests/delegatedProperty/wrongSetterReturnType.kt

@@ -1,12 +1,12 @@
 var b: Int by Delegate()
 
 class Delegate {
-    fun get(t: Any?, p: String): Int {
+    fun get(t: Any?, p: PropertyMetadata): Int {
       t.equals(p) // to avoid UNUSED_PARAMETER warning
       return 1
     }
 
-    fun set(t: Any?, p: String, i: Int): Int {
+    fun set(t: Any?, p: PropertyMetadata, i: Int): Int {
       t.equals(p) // to avoid UNUSED_PARAMETER warning
       return i
     }

runtime/src/jet/PropertyMetadata.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2010-2013 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jet;
+
+import org.jetbrains.jet.rt.annotation.AssertInvisibleInResolver;
+
+@AssertInvisibleInResolver
+public interface PropertyMetadata {
+
+    public String getName();
+}

runtime/src/jet/PropertyMetadataImpl.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2010-2013 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jet;
+
+import org.jetbrains.jet.rt.annotation.AssertInvisibleInResolver;
+
+@AssertInvisibleInResolver
+public class PropertyMetadataImpl implements PropertyMetadata {
+    private final String name;
+
+    public PropertyMetadataImpl(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String getName() {
+        return name;
+    }
+}