46 lines
990 B
C
46 lines
990 B
C
// RUN: %clang_cc1 -fsyntax-only -Wunused -std=c2x -verify %s
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// This is the latest version of maybe_unused that we support.
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_Static_assert(__has_c_attribute(maybe_unused) == 202106L);
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struct [[maybe_unused]] S1 { // ok
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int a [[maybe_unused]];
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};
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enum [[maybe_unused]] E1 {
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EnumVal [[maybe_unused]]
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};
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[[maybe_unused]] void unused_func([[maybe_unused]] int parm) {
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typedef int maybe_unused_int [[maybe_unused]];
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[[maybe_unused]] int I;
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}
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void f1(void) {
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int x; // expected-warning {{unused variable}}
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typedef int I; // expected-warning {{unused typedef 'I'}}
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// Should not warn about these due to not being used.
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[[maybe_unused]] int y;
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typedef int maybe_unused_int [[maybe_unused]];
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// Should not warn about these uses.
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struct S1 s;
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maybe_unused_int test;
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y = 12;
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}
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void f2(void);
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[[maybe_unused]] void f2(void);
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void f2(void) {
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}
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void label(void) {
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[[maybe_unused]] label:
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;
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other_label: // expected-warning {{unused label 'other_label'}}
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;
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}
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