59e052568e
This attribute tells the compiler that the variable must have its exit-time destructor run, so it makes sense that it would silence the warning telling users that an exit-time destructor is required. Fixes https://github.com/llvm/llvm-project/issues/68686
81 lines
1.8 KiB
C++
81 lines
1.8 KiB
C++
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -Wexit-time-destructors %s -verify=expected,cxx11
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// RUN: %clang_cc1 -std=c++20 -fsyntax-only -Wexit-time-destructors %s -verify=expected
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namespace test1 {
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struct A { ~A(); };
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A a; // expected-warning {{declaration requires an exit-time destructor}}
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A b[10]; // expected-warning {{declaration requires an exit-time destructor}}
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A c[10][10]; // expected-warning {{declaration requires an exit-time destructor}}
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A &d = a;
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A &e = b[5];
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A &f = c[5][7];
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}
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namespace test2 {
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void f() {
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struct A { ~A() { } };
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static A a; // expected-warning {{declaration requires an exit-time destructor}}
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static A b[10]; // expected-warning {{declaration requires an exit-time destructor}}
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static A c[10][10]; // expected-warning {{declaration requires an exit-time destructor}}
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static A &d = a;
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static A &e = b[5];
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static A &f = c[5][7];
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}
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}
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namespace test3 {
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struct A { ~A() = default; };
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A a;
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struct B { ~B(); };
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struct C : B { ~C() = default; };
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C c; // expected-warning {{exit-time destructor}}
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class D {
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friend struct E;
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~D() = default;
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};
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struct E : D {
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D d;
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~E() = default;
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};
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E e;
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}
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namespace test4 {
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struct A { ~A(); };
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[[clang::no_destroy]] A a; // no warning
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}
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namespace test5 {
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struct A { ~A(); };
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[[clang::always_destroy]] A a; // no warning
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void func() {
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[[clang::always_destroy]] static A a; // no warning
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}
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}
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namespace test6 {
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#if __cplusplus >= 202002L
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#define CPP20_CONSTEXPR constexpr
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#else
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#define CPP20_CONSTEXPR
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#endif
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struct S {
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CPP20_CONSTEXPR ~S() {}
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};
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S s; // cxx11-warning {{exit-time destructor}}
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struct T {
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CPP20_CONSTEXPR ~T() { if (b) {} }
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bool b;
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};
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T t; // expected-warning {{exit-time destructor}}
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#undef CPP20_CONSTEXPR
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}
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