Fixed KT-4814: check type when a += b is a = a+b

In cases when a += b is a = a + b, check that (a+b) can be safely casted to a
2014-07-21 13:12:13 +04:00
parent 2b67716e95
commit 76845a76b9
3 changed files with 54 additions and 0 deletions
@@ -0,0 +1,48 @@
+fun intBinEq() {
+    var x = 0
+    x += 'a'
+    x += 1.toByte()
+    x += 1.toShort()
+    <!TYPE_MISMATCH!>x += 1L<!>
+    <!TYPE_MISMATCH!>x += 1f<!>
+    <!TYPE_MISMATCH!>x += 1.0<!>
+    x *= 'a'
+    x *= 1.toByte()
+    x *= 1.toShort()
+    <!TYPE_MISMATCH!>x *= 1L<!>
+    <!TYPE_MISMATCH!>x *= 1f<!>
+    <!TYPE_MISMATCH!>x *= 1.0<!>
+}
+
+fun shortBinEq() {
+    var x = 0.toShort()
+    <!TYPE_MISMATCH!>x += 'a'<!>
+    <!TYPE_MISMATCH!>x += 1.toByte()<!>
+    <!TYPE_MISMATCH!>x += 1.toShort()<!>
+    <!TYPE_MISMATCH!>x += 1L<!>
+    <!TYPE_MISMATCH!>x += 1f<!>
+    <!TYPE_MISMATCH!>x += 1.0<!>
+
+    <!TYPE_MISMATCH!>x *= 'a'<!>
+    <!TYPE_MISMATCH!>x *= 1.toByte()<!>
+    <!TYPE_MISMATCH!>x *= 1.toShort()<!>
+    <!TYPE_MISMATCH!>x *= 1L<!>
+    <!TYPE_MISMATCH!>x *= 1f<!>
+    <!TYPE_MISMATCH!>x *= 1.0<!>
+}
+
+class A {
+    fun plus(x : A) : A { return x }
+}
+
+class B {
+    fun plus(x : A) : A { return x }
+}
+
+fun overloading() {
+    var x = A()
+    var y = A()
+    x += y
+    var z = B()
+    <!TYPE_MISMATCH!>z += x<!>
+}