Support warning about useless cast on safe cast

#KT-13348 Fixed
2017-04-07 04:56:59 +03:00
parent 107879a78a
commit 7f287a4230
12 changed files with 56 additions and 23 deletions
@@ -0,0 +1,22 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER, -UNUSED_VARIABLE
+
+fun test(x: Int?) {
+    val a1 = x <!USELESS_CAST!>as? Int<!>
+    val a2 = x <!USELESS_CAST!>as? Int?<!>
+    val a3 = x as? Number
+    val a4 = x as? Number?
+    val a5: Int? = x <!USELESS_CAST!>as? Int<!>
+    val a6: Number? = x <!USELESS_CAST!>as? Int<!>
+    val a7: Number? = 1 <!USELESS_CAST!>as? Number<!>
+
+    run { x <!USELESS_CAST!>as? Int<!> }
+    run { x as? Number }
+
+    foo(x as? Number)
+
+    if (x is Int) {
+        val b = x as? Int
+    }
+}
+
+fun foo(x: Number?) {}