diff options
Diffstat (limited to 'clang/test/SemaObjCXX/attr-nodiscard.mm')
| -rw-r--r-- | clang/test/SemaObjCXX/attr-nodiscard.mm | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/clang/test/SemaObjCXX/attr-nodiscard.mm b/clang/test/SemaObjCXX/attr-nodiscard.mm new file mode 100644 index 0000000..e1eefb7 --- /dev/null +++ b/clang/test/SemaObjCXX/attr-nodiscard.mm @@ -0,0 +1,26 @@ +// RUN: %clang_cc1 -fsyntax-only -verify %s + +template<class T> +struct [[nodiscard]] expected {}; + +using E = expected<int>; + +@interface INTF +- (int) a [[nodiscard]]; ++ (int) b [[nodiscard]]; +- (expected<int>) c; ++ (expected<int>) d; +- (E) e; ++ (E) f; +- (void) g [[nodiscard]]; // expected-warning {{attribute 'nodiscard' cannot be applied to Objective-C method without return value}} +@end + +void foo(INTF *a) { + [a a]; // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} + [INTF b]; // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} + [a c]; // expected-warning {{ignoring return value of type 'expected<int>' declared with 'nodiscard' attribute}} + [INTF d]; // expected-warning {{ignoring return value of type 'expected<int>' declared with 'nodiscard' attribute}} + [a e]; // expected-warning {{ignoring return value of type 'expected<int>' declared with 'nodiscard' attribute}} + [INTF f]; // expected-warning {{ignoring return value of type 'expected<int>' declared with 'nodiscard' attribute}} + [a g]; +} |