Extract CallableReferenceCandidate into separate file

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/components/CallableReferenceCandidate.kt

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.resolve.calls.components
+
+import org.jetbrains.kotlin.descriptors.CallableDescriptor
+import org.jetbrains.kotlin.resolve.calls.inference.components.FreshVariableNewTypeSubstitutor
+import org.jetbrains.kotlin.resolve.calls.model.CompatibilityWarning
+import org.jetbrains.kotlin.resolve.calls.model.KotlinCallDiagnostic
+import org.jetbrains.kotlin.resolve.calls.tasks.ExplicitReceiverKind
+import org.jetbrains.kotlin.resolve.calls.tower.Candidate
+import org.jetbrains.kotlin.resolve.calls.tower.getResultApplicability
+import org.jetbrains.kotlin.resolve.calls.tower.isSuccess
+import org.jetbrains.kotlin.types.UnwrappedType
+
+/**
+ * Suppose we have class A with staticM, memberM, memberExtM.
+ * For A::staticM both receivers will be null
+ * For A::memberM dispatchReceiver = UnboundReceiver, extensionReceiver = null
+ * For a::memberExtM dispatchReceiver = ExplicitValueReceiver, extensionReceiver = ExplicitValueReceiver
+ *
+ * For class B with companion object B::companionM dispatchReceiver = BoundValueReference
+ */
+class CallableReferenceCandidate(
+    val candidate: CallableDescriptor,
+    val dispatchReceiver: CallableReceiver?,
+    val extensionReceiver: CallableReceiver?,
+    val explicitReceiverKind: ExplicitReceiverKind,
+    val reflectionCandidateType: UnwrappedType,
+    val callableReferenceAdaptation: CallableReferenceAdaptation?,
+    initialDiagnostics: List<KotlinCallDiagnostic>
+) : Candidate {
+    private val mutableDiagnostics = initialDiagnostics.toMutableList()
+    val diagnostics: List<KotlinCallDiagnostic> = mutableDiagnostics
+
+    override val resultingApplicability = getResultApplicability(diagnostics)
+
+    override fun addCompatibilityWarning(other: Candidate) {
+        if (this !== other && other is CallableReferenceCandidate) {
+            mutableDiagnostics.add(CompatibilityWarning(other.candidate))
+        }
+    }
+
+    override val isSuccessful get() = resultingApplicability.isSuccess
+
+    var freshSubstitutor: FreshVariableNewTypeSubstitutor? = null
+        internal set
+
+    val numDefaults get() = callableReferenceAdaptation?.defaults ?: 0
+}

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/components/CallableReferenceResolution.kt

@@ -44,42 +44,6 @@ sealed class CallableReceiver(val receiver: ReceiverValueWithSmartCastInfo) {
 private val CallableReceiver.asReceiverValueForVisibilityChecks: ReceiverValue
     get() = receiver.receiverValue
 
-/**
- * Suppose we have class A with staticM, memberM, memberExtM.
- * For A::staticM both receivers will be null
- * For A::memberM dispatchReceiver = UnboundReceiver, extensionReceiver = null
- * For a::memberExtM dispatchReceiver = ExplicitValueReceiver, extensionReceiver = ExplicitValueReceiver
- *
- * For class B with companion object B::companionM dispatchReceiver = BoundValueReference
- */
-class CallableReferenceCandidate(
-    val candidate: CallableDescriptor,
-    val dispatchReceiver: CallableReceiver?,
-    val extensionReceiver: CallableReceiver?,
-    val explicitReceiverKind: ExplicitReceiverKind,
-    val reflectionCandidateType: UnwrappedType,
-    val callableReferenceAdaptation: CallableReferenceAdaptation?,
-    initialDiagnostics: List<KotlinCallDiagnostic>
-) : Candidate {
-    private val mutableDiagnostics = initialDiagnostics.toMutableList()
-    val diagnostics: List<KotlinCallDiagnostic> = mutableDiagnostics
-
-    override val resultingApplicability = getResultApplicability(diagnostics)
-
-    override fun addCompatibilityWarning(other: Candidate) {
-        if (this !== other && other is CallableReferenceCandidate) {
-            mutableDiagnostics.add(CompatibilityWarning(other.candidate))
-        }
-    }
-
-    override val isSuccessful get() = resultingApplicability.isSuccess
-
-    var freshSubstitutor: FreshVariableNewTypeSubstitutor? = null
-        internal set
-
-    val numDefaults get() = callableReferenceAdaptation?.defaults ?: 0
-}
-
 class CallableReferenceAdaptation(
     val argumentTypes: Array<KotlinType>,
     val coercionStrategy: CoercionStrategy,