"introduce backing property" intention

idea/testData/intentions/introduceBackingProperty/.intention

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.intentions.IntroduceBackingPropertyIntention

idea/testData/intentions/introduceBackingProperty/backingFieldRef.kt

@@ -0,0 +1,9 @@
+class Foo {
+    var <caret>x = ""
+        get() = $x + "!"
+        set(value) { $x = value + "!" }
+
+    fun foo(): String {
+        return $x
+    }
+}

idea/testData/intentions/introduceBackingProperty/backingFieldRef.kt.after

@@ -0,0 +1,10 @@
+class Foo {
+    private var _x = ""
+    var x: String
+        get() = _x + "!"
+        set(value) { _x = value + "!" }
+
+    fun foo(): String {
+        return _x
+    }
+}

idea/testData/intentions/introduceBackingProperty/simpleVal.kt

@@ -0,0 +1,3 @@
+class Foo {
+    val <caret>x = ""
+}

idea/testData/intentions/introduceBackingProperty/simpleVal.kt.after

@@ -0,0 +1,5 @@
+class Foo {
+    private val _x = ""
+    val x: String
+        get() = _x
+}

idea/testData/intentions/introduceBackingProperty/simpleVar.kt

@@ -0,0 +1,3 @@
+class Foo {
+    var <caret>x = ""
+}

idea/testData/intentions/introduceBackingProperty/simpleVar.kt.after

@@ -0,0 +1,8 @@
+class Foo {
+    private var _x = ""
+    var x: String
+        get() = _x
+        set(value) {
+            _x = value
+        }
+}

idea/testData/intentions/introduceBackingProperty/valWithAccessor.kt

@@ -0,0 +1,4 @@
+class Foo {
+    val <caret>x = ""
+        get() = field + "!"
+}

idea/testData/intentions/introduceBackingProperty/valWithAccessor.kt.after

@@ -0,0 +1,5 @@
+class Foo {
+    private val _x = ""
+    val x: String
+        get() = _x + "!"
+}

idea/testData/intentions/introduceBackingProperty/varWithAccessor.kt

@@ -0,0 +1,5 @@
+class Foo {
+    var <caret>x = ""
+        get() = field + "!"
+        set(value) { field = value + "!" }
+}

idea/testData/intentions/introduceBackingProperty/varWithAccessor.kt.after

@@ -0,0 +1,6 @@
+class Foo {
+    private var _x = ""
+    var x: String
+        get() = _x + "!"
+        set(value) { _x = value + "!" }
+}