Checking for unsupported return's

idea/testData/refactoring/inline/function/MultipleReturns.kt

@@ -0,0 +1,14 @@
+// ERROR: Cannot perform refactoring.\nInline Function is not supported for functions with multiple return statements.
+
+fun <caret>f(p1: Int, p2: Int): Int {
+    if (p1 > 0) {
+        return p2
+    }
+    else {
+        return -1
+    }
+}
+
+fun g() {
+    f(1, 2)
+}

idea/testData/refactoring/inline/function/ReturnNotInTheEnd.kt

@@ -0,0 +1,13 @@
+// ERROR: Cannot perform refactoring.\nInline Function is not supported for functions with return statements not at the end of the body.
+
+fun <caret>f(p1: Int, p2: Int): Int {
+    while (true) {
+        if (x() > p1) return@f p2
+    }
+}
+
+fun x(): Int = TODO()
+
+fun g() {
+    f(1, 2)
+}

idea/testData/refactoring/inline/function/returnAtEnd/ReturnFromLambda.kt

@@ -0,0 +1,10 @@
+fun <caret>f(list: List<String>): Boolean {
+    return list.any {
+        if (it.isEmpty()) return@any false
+        it.length < 10
+    }
+}
+
+fun g() {
+    println(f(listOf("a", "b")))
+}

idea/testData/refactoring/inline/function/returnAtEnd/ReturnFromLambda.kt.after

@@ -0,0 +1,6 @@
+fun g() {
+    println(listOf("a", "b").any {
+        if (it.isEmpty()) return@any false
+        it.length < 10
+    })
+}