Add code transformations for if/when in local property initializers

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/nestedIfs.kt

@@ -0,0 +1,19 @@
+fun test(n: Int): String? {
+    val res = <caret>if (n == 1) {
+        if (3 > 2) {
+            println("***")
+            "one"
+        } else {
+            println("***")
+            "???"
+        }
+    } else if (n == 2) {
+        println("***")
+        null
+    } else {
+        println("***")
+        "too many"
+    }
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/nestedIfs.kt.after

@@ -0,0 +1,20 @@
+fun test(n: Int): String? {
+    val res:<caret> String?
+    if (n == 1) {
+        res = if (3 > 2) {
+            println("***")
+            "one"
+        } else {
+            println("***")
+            "???"
+        }
+    } else res = if (n == 2) {
+        println("***")
+        null
+    } else {
+        println("***")
+        "too many"
+    }
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/nestedIfs2.kt

@@ -0,0 +1,19 @@
+fun test(n: Int): String? {
+    var res = <caret>if (n == 1) {
+        if (3 > 2) {
+            println("***")
+            "one"
+        } else {
+            println("***")
+            "???"
+        }
+    } else if (n == 2) {
+        println("***")
+        null
+    } else {
+        println("***")
+        "too many"
+    }
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/nestedIfs2.kt.after

@@ -0,0 +1,20 @@
+fun test(n: Int): String? {
+    var res:<caret> String?
+    if (n == 1) {
+        res = if (3 > 2) {
+            println("***")
+            "one"
+        } else {
+            println("***")
+            "???"
+        }
+    } else res = if (n == 2) {
+        println("***")
+        null
+    } else {
+        println("***")
+        "too many"
+    }
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/nonLocalProperty.kt

@@ -0,0 +1,2 @@
+// IS_APPLICABLE: false
+val<caret> x = if (false) "0" else "1"

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/nonLocalProperty2.kt

@@ -0,0 +1,2 @@
+// IS_APPLICABLE: false
+var<caret> x = if (false) "0" else "1"

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/simpleIf.kt

@@ -0,0 +1,5 @@
+fun test(n: Int): String {
+    val <caret>res = if (n == 1) "one" else "two"
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/simpleIf.kt.after

@@ -0,0 +1,6 @@
+fun test(n: Int): String {
+    val <caret>res: String
+    if (n == 1) res = "one" else res = "two"
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/simpleIf2.kt

@@ -0,0 +1,5 @@
+fun test(n: Int): String {
+    var <caret>res = if (n == 1) "one" else "two"
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/simpleIf2.kt.after

@@ -0,0 +1,6 @@
+fun test(n: Int): String {
+    var <caret>res: String
+    if (n == 1) res = "one" else res = "two"
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/simpleIfWithBlocks.kt

@@ -0,0 +1,11 @@
+fun test(n: Int): String {
+    val res<caret> = if (n == 1) {
+        println("***")
+        "one"
+    } else {
+        println("***")
+        "two"
+    }
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/simpleIfWithBlocks.kt.after

@@ -0,0 +1,12 @@
+fun test(n: Int): String {
+    val res<caret>: String
+    if (n == 1) {
+        println("***")
+        res = "one"
+    } else {
+        println("***")
+        res = "two"
+    }
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/simpleIfWithBlocks2.kt

@@ -0,0 +1,11 @@
+fun test(n: Int): String {
+    var res<caret> = if (n == 1) {
+        println("***")
+        "one"
+    } else {
+        println("***")
+        "two"
+    }
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/simpleIfWithBlocks2.kt.after

@@ -0,0 +1,12 @@
+fun test(n: Int): String {
+    var res<caret>: String
+    if (n == 1) {
+        println("***")
+        res = "one"
+    } else {
+        println("***")
+        res = "two"
+    }
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/simpleIfWithType.kt

@@ -0,0 +1,5 @@
+fun test(n: Int): String {
+    val <caret>res: jet.String = if (n == 1) "one" else "two"
+
+    return res
+}

idea/testData/codeInsight/codeTransformations/branched/unfolding/propertyToIf/simpleIfWithType.kt.after

@@ -0,0 +1,6 @@
+fun test(n: Int): String {
+    val <caret>res: jet.String
+    if (n == 1) res = "one" else res = "two"
+
+    return res
+}