[FE 1.0] Report USELESS_IS_CHECK if is expression is always false

^KT-47684 Fixed
2021-07-09 14:03:48 +03:00
parent 785e2f862c
commit 7b5a5f5682
24 changed files with 283 additions and 59 deletions
@@ -30,11 +30,11 @@ fun useEn(x: En) = x
 fun useEn2(x: En2) = x

 fun bar(x: Any) {
-    if (x is En && x is En2) {
+    if (x is En && <!USELESS_IS_CHECK!>x is En2<!>) {
        when (<!DEBUG_INFO_SMARTCAST!>x<!>) {
            En.A -> useEn(<!DEBUG_INFO_SMARTCAST!>x<!>)
            En2.D -> useEn2(<!DEBUG_INFO_SMARTCAST!>x<!>)
            else -> {}
        }
    }
-}
+}