Extract Function: Add support of initializer expressions

idea/testData/refactoring/extractFunction/initializers/functions/localFunction.kt

@@ -0,0 +1,5 @@
+// PARAM_TYPES: kotlin.Int
+// PARAM_TYPES: kotlin.Int
+fun bar(n: Int) {
+    fun foo(a: Int, b: Int) = <selection>a + b - n</selection> - 1
+}

idea/testData/refactoring/extractFunction/initializers/functions/localFunction.kt.after

@@ -0,0 +1,9 @@
+// PARAM_TYPES: kotlin.Int
+// PARAM_TYPES: kotlin.Int
+fun bar(n: Int) {
+    fun i(a: Int, b: Int): Int {
+        return a + b - n
+    }
+
+    fun foo(a: Int, b: Int) = i(a, b) - 1
+}

idea/testData/refactoring/extractFunction/initializers/functions/localFunctionParameters.kt

@@ -0,0 +1,4 @@
+// PARAM_TYPES: kotlin.Int
+fun bar(n: Int) {
+    fun foo(a: Int, b: Int = <selection>a + n</selection>) = a + b - n - 1
+}

idea/testData/refactoring/extractFunction/initializers/functions/localFunctionParameters.kt.conflicts

@@ -0,0 +1 @@
+Cannot extract method since following types are not denotable in the target scope: [ERROR : ]

idea/testData/refactoring/extractFunction/initializers/functions/memberFunction.kt

@@ -0,0 +1,5 @@
+// PARAM_TYPES: kotlin.Int
+// PARAM_TYPES: kotlin.Int
+class A(val n: Int) {
+    fun foo(a: Int, b: Int) = <selection>a + b - n</selection> - 1
+}

idea/testData/refactoring/extractFunction/initializers/functions/memberFunction.kt.after

@@ -0,0 +1,9 @@
+// PARAM_TYPES: kotlin.Int
+// PARAM_TYPES: kotlin.Int
+class A(val n: Int) {
+    fun foo(a: Int, b: Int) = i(a, b) - 1
+
+    fun i(a: Int, b: Int): Int {
+        return a + b - n
+    }
+}

idea/testData/refactoring/extractFunction/initializers/functions/memberFunctionParameters.kt

@@ -0,0 +1,4 @@
+// PARAM_TYPES: kotlin.Int
+class A(val n: Int) {
+    fun foo(a: Int, b: Int = <selection>a + n</selection>) = a + b - n - 1
+}

idea/testData/refactoring/extractFunction/initializers/functions/memberFunctionParameters.kt.after

@@ -0,0 +1,8 @@
+// PARAM_TYPES: kotlin.Int
+class A(val n: Int) {
+    fun foo(a: Int, b: Int = i(a)) = a + b - n - 1
+
+    fun i(a: Int): Int {
+        return a + n
+    }
+}

idea/testData/refactoring/extractFunction/initializers/functions/topLevelFunction.kt

@@ -0,0 +1,3 @@
+// PARAM_TYPES: kotlin.Int
+// PARAM_TYPES: kotlin.Int
+fun foo(a: Int, b: Int) = <selection>a + b</selection> - 1

idea/testData/refactoring/extractFunction/initializers/functions/topLevelFunction.kt.after

@@ -0,0 +1,7 @@
+// PARAM_TYPES: kotlin.Int
+// PARAM_TYPES: kotlin.Int
+fun foo(a: Int, b: Int) = i(a, b) - 1
+
+fun i(a: Int, b: Int): Int {
+    return a + b
+}

idea/testData/refactoring/extractFunction/initializers/functions/topLevelFunctionParameters.kt

@@ -0,0 +1,3 @@
+// PARAM_TYPES: kotlin.Int
+val n = 1
+fun foo(a: Int, b: Int = <selection>a + n</selection>) = a + b - 1

idea/testData/refactoring/extractFunction/initializers/functions/topLevelFunctionParameters.kt.after

@@ -0,0 +1,7 @@
+// PARAM_TYPES: kotlin.Int
+val n = 1
+fun foo(a: Int, b: Int = i(a)) = a + b - 1
+
+fun i(a: Int): Int {
+    return a + n
+}