derek.holloway
7502bf64a4
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33 lines
1.4 KiB
Objective-C
33 lines
1.4 KiB
Objective-C
// RUN: %clang_cc1 -fsyntax-only -verify %s
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struct [[nodiscard]] expected {};
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typedef struct expected E;
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[[nodiscard]] typedef int NI; // expected-warning {{'[[nodiscard]]' attribute ignored when applied to a typedef}}
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typedef __attribute__((warn_unused_result)) int WUR;
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@interface INTF
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- (int) a [[nodiscard]];
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+ (int) b [[nodiscard]];
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- (struct expected) c;
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+ (struct expected) d;
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- (E) e;
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+ (E) f;
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- (void) g [[nodiscard]]; // expected-warning {{attribute 'nodiscard' cannot be applied to Objective-C method without return value}}
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- (NI) h;
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- (WUR) i;
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@end
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void foo(INTF *a) {
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[a a]; // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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[INTF b]; // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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[a c]; // expected-warning {{ignoring return value of type 'expected' declared with 'nodiscard' attribute}}
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[INTF d]; // expected-warning {{ignoring return value of type 'expected' declared with 'nodiscard' attribute}}
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[a e]; // expected-warning {{ignoring return value of type 'expected' declared with 'nodiscard' attribute}}
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[INTF f]; // expected-warning {{ignoring return value of type 'expected' declared with 'nodiscard' attribute}}
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[a g]; // no warning because g returns void
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[a h]; // no warning because attribute is ignored when applied to a typedef
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[a i]; // expected-warning {{ignoring return value of type 'WUR' declared with 'warn_unused_result' attribute}}
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}
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