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

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^KT-47684 Fixed
This commit is contained in:
Dmitriy Novozhilov
2021-07-09 14:03:48 +03:00
committed by teamcityserver
parent 785e2f862c
commit 7b5a5f5682
24 changed files with 283 additions and 59 deletions
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compiler/testData/diagnostics/tests/cast/IsRecursionSustainable.kt
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+2 -2
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@@ -2,5 +2,5 @@ open class RecA<T>: <!CYCLIC_INHERITANCE_HIERARCHY!>RecB<T><!>()
open class RecB<T>: <!CYCLIC_INHERITANCE_HIERARCHY!>RecA<T><!>()
open class SelfR<T>: <!CYCLIC_INHERITANCE_HIERARCHY!>SelfR<T><!>()
fun test(f: SelfR<String>) = f is <!CANNOT_CHECK_FOR_ERASED!>RecA<String><!>
fun test(f: RecB<String>) = f is <!CANNOT_CHECK_FOR_ERASED!>RecA<String><!>
fun test(f: SelfR<String>) = <!USELESS_IS_CHECK!>f is <!CANNOT_CHECK_FOR_ERASED!>RecA<String><!><!>
fun test(f: RecB<String>) = <!USELESS_IS_CHECK!>f is <!CANNOT_CHECK_FOR_ERASED!>RecA<String><!><!>