Set reference target and report custom error instead unresolved reference for cases: interface, generic parameter, object + invoke, class without companion.

#KT-2787 Fixed.

compiler/testData/diagnostics/tests/ResolveToJava.kt

@@ -27,7 +27,7 @@ fun test(<!UNUSED_PARAMETER!>l<!> : <!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>java.util
   checkSubtype<Set<Int>?>(Collections.singleton<Int>(1))
   Collections.singleton<Int>(<!CONSTANT_EXPECTED_TYPE_MISMATCH!>1.0<!>)
 
-  <!UNRESOLVED_REFERENCE!>List<!><Int>
+  <!RESOLUTION_TO_CLASSIFIER!>List<!><Int>
 
 
   val <!UNUSED_VARIABLE!>o<!> = "sdf" as <!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>Object<!>

compiler/testData/diagnostics/tests/inner/nestedClassAccessedViaInstanceReference.kt

@@ -30,7 +30,7 @@ fun test(with: WithClassObject, without: WithoutClassObject, obj: Obj) {
     with.<!NO_COMPANION_OBJECT, NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>NestedWithClassObject<!>.foo()
     with.<!NO_COMPANION_OBJECT, NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>NestedEnum<!>.A
     with.<!NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>NestedObj<!>
-    with.<!UNRESOLVED_REFERENCE!>NestedObj<!>()
+    with.<!RESOLUTION_TO_CLASSIFIER!>NestedObj<!>()
     with.<!NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>NestedObj<!>.foo()
 
     without.<!UNRESOLVED_REFERENCE!>Nested<!>()
@@ -39,7 +39,7 @@ fun test(with: WithClassObject, without: WithoutClassObject, obj: Obj) {
     without.<!NO_COMPANION_OBJECT, NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>NestedWithClassObject<!>.foo()
     without.<!NO_COMPANION_OBJECT, NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>NestedEnum<!>.A
     without.<!NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>NestedObj<!>
-    without.<!UNRESOLVED_REFERENCE!>NestedObj<!>()
+    without.<!RESOLUTION_TO_CLASSIFIER!>NestedObj<!>()
     without.<!NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>NestedObj<!>.foo()
 
     obj.<!UNRESOLVED_REFERENCE!>Nested<!>()
@@ -48,6 +48,6 @@ fun test(with: WithClassObject, without: WithoutClassObject, obj: Obj) {
     obj.<!NO_COMPANION_OBJECT, NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>NestedWithClassObject<!>.foo()
     obj.<!NO_COMPANION_OBJECT, NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>NestedEnum<!>.A
     obj.<!NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>NestedObj<!>
-    obj.<!UNRESOLVED_REFERENCE!>NestedObj<!>()
+    obj.<!RESOLUTION_TO_CLASSIFIER!>NestedObj<!>()
     obj.<!NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>NestedObj<!>.foo()
 }

compiler/testData/diagnostics/tests/regressions/kt4827.kt

@@ -11,6 +11,6 @@ class C {
 }
 
 fun f() {
-    <!UNRESOLVED_REFERENCE!>TestInterface<!>()
+    <!RESOLUTION_TO_CLASSIFIER!>TestInterface<!>()
     C.<!UNRESOLVED_REFERENCE!>I<!>()
 }

compiler/testData/diagnostics/tests/resolve/noCandidates/kt2787.kt

@@ -0,0 +1,6 @@
+interface MutableMatrix<T> {
+}
+
+fun <T> toMutableMatrix(): MutableMatrix<T> {
+    return <!RESOLUTION_TO_CLASSIFIER!>MutableMatrix<!><T>()
+}

compiler/testData/diagnostics/tests/resolve/noCandidates/kt2787.txt

@@ -0,0 +1,9 @@
+package
+
+public fun </*0*/ T> toMutableMatrix(): MutableMatrix<T>
+
+public interface MutableMatrix</*0*/ T> {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/tests/resolve/noCandidates/resolvedToClassifier.kt

@@ -0,0 +1,19 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+interface A
+
+object B
+class C
+
+fun test() {
+    val interface_as_fun = <!RESOLUTION_TO_CLASSIFIER!>A<!>()
+    val interface_as_val = <!NO_COMPANION_OBJECT!>A<!>
+
+    val object_as_fun = <!FUNCTION_EXPECTED!>B<!>()
+    val class_as_val = <!NO_COMPANION_OBJECT!>C<!>
+}
+
+fun <T> bar() {
+    val typeParameter_as_val = <!TYPE_PARAMETER_IS_NOT_AN_EXPRESSION!>T<!>
+    val typeParameter_as_fun = <!RESOLUTION_TO_CLASSIFIER!>T<!>()
+}

compiler/testData/diagnostics/tests/resolve/noCandidates/resolvedToClassifier.txt

@@ -0,0 +1,24 @@
+package
+
+public fun </*0*/ T> bar(): kotlin.Unit
+public fun test(): kotlin.Unit
+
+public interface A {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public object B {
+    private constructor B()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class C {
+    public constructor C()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/tests/resolve/noCandidates/resolvedToClassifierWithReceiver.kt

@@ -0,0 +1,39 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+object X {
+    interface A
+
+    object B
+    class C
+}
+
+fun testX() {
+    val interface_as_fun = X.<!RESOLUTION_TO_CLASSIFIER!>A<!>()
+    val interface_as_val = X.<!NO_COMPANION_OBJECT!>A<!>
+
+    val object_as_fun = X.<!FUNCTION_EXPECTED!>B<!>()
+    val class_as_val = X.<!NO_COMPANION_OBJECT!>C<!>
+}
+
+class Y {
+    interface A
+
+    object B
+    class C
+}
+
+fun testY() {
+    val interface_as_fun = Y.<!RESOLUTION_TO_CLASSIFIER!>A<!>()
+    val interface_as_val = Y.<!NO_COMPANION_OBJECT!>A<!>
+
+    val object_as_fun = Y.<!FUNCTION_EXPECTED!>B<!>()
+    val class_as_val = Y.<!NO_COMPANION_OBJECT!>C<!>
+}
+
+fun test(x: X) {
+    val interface_as_fun = x.<!RESOLUTION_TO_CLASSIFIER!>A<!>()
+    val interface_as_val = x.<!NO_COMPANION_OBJECT, NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>A<!>
+
+    val object_as_fun = x.<!RESOLUTION_TO_CLASSIFIER!>B<!>()
+    val class_as_val = x.<!NO_COMPANION_OBJECT, NESTED_CLASS_ACCESSED_VIA_INSTANCE_REFERENCE!>C<!>
+}

compiler/testData/diagnostics/tests/resolve/noCandidates/resolvedToClassifierWithReceiver.txt

@@ -0,0 +1,59 @@
+package
+
+public fun test(/*0*/ x: X): kotlin.Unit
+public fun testX(): kotlin.Unit
+public fun testY(): kotlin.Unit
+
+public object X {
+    private constructor X()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public interface A {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public object B {
+        private constructor B()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class C {
+        public constructor C()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class Y {
+    public constructor Y()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public interface A {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public object B {
+        private constructor B()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class C {
+        public constructor C()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}

compiler/testData/diagnostics/tests/typealias/typeAliasConstructor.kt

@@ -18,7 +18,7 @@ object AnObject
 typealias TO = AnObject
 
 val test6 = <!UNRESOLVED_REFERENCE!>TI<!>()
-val test6a = <!UNRESOLVED_REFERENCE!>Interface<!>()
+val test6a = <!RESOLUTION_TO_CLASSIFIER!>Interface<!>()
 
 val test7 = <!FUNCTION_EXPECTED!>TO<!>()
 val test7a = <!FUNCTION_EXPECTED!>AnObject<!>()