70 lines
3.6 KiB
C++
70 lines
3.6 KiB
C++
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// RUN: %clang_cc1 -std=c++1z -fsized-deallocation -fexceptions %s -verify
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using size_t = decltype(sizeof(0));
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namespace std { enum class align_val_t : size_t {}; }
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struct Arg {} arg;
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// If the type is aligned, first try with an alignment argument and then
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// without. If not, never consider supplying an alignment.
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template<unsigned Align, typename ...Ts>
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struct alignas(Align) Unaligned {
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void *operator new(size_t, Ts...) = delete; // expected-note 4{{deleted}}
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};
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auto *ua = new Unaligned<__STDCPP_DEFAULT_NEW_ALIGNMENT__>; // expected-error {{deleted}}
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auto *ub = new Unaligned<__STDCPP_DEFAULT_NEW_ALIGNMENT__ * 2>; // expected-error {{deleted}}
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auto *uap = new (arg) Unaligned<__STDCPP_DEFAULT_NEW_ALIGNMENT__, Arg>; // expected-error {{deleted}}
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auto *ubp = new (arg) Unaligned<__STDCPP_DEFAULT_NEW_ALIGNMENT__ * 2, Arg>; // expected-error {{deleted}}
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template<unsigned Align, typename ...Ts>
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struct alignas(Align) Aligned {
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void *operator new(size_t, std::align_val_t, Ts...) = delete; // expected-note 2{{deleted}} expected-note 2{{not viable}}
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};
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auto *aa = new Aligned<__STDCPP_DEFAULT_NEW_ALIGNMENT__>; // expected-error {{no matching}}
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auto *ab = new Aligned<__STDCPP_DEFAULT_NEW_ALIGNMENT__ * 2>; // expected-error {{deleted}}
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auto *aap = new (arg) Aligned<__STDCPP_DEFAULT_NEW_ALIGNMENT__, Arg>; // expected-error {{no matching}}
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auto *abp = new (arg) Aligned<__STDCPP_DEFAULT_NEW_ALIGNMENT__ * 2, Arg>; // expected-error {{deleted}}
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// If both are available, we prefer the aligned version for an overaligned
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// type, and only use the unaligned version for a non-overaligned type.
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template<unsigned Align, typename ...Ts>
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struct alignas(Align) Both1 {
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void *operator new(size_t, Ts...); // expected-note 2{{not viable}}
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void *operator new(size_t, std::align_val_t, Ts...) = delete; // expected-note 2{{deleted}}
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};
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template<unsigned Align, typename ...Ts>
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struct alignas(Align) Both2 {
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void *operator new(size_t, Ts...) = delete; // expected-note 2{{deleted}}
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void *operator new(size_t, std::align_val_t, Ts...); // expected-note 2{{not viable}}
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};
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auto *b1a = new Both1<__STDCPP_DEFAULT_NEW_ALIGNMENT__>;
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auto *b1b = new Both1<__STDCPP_DEFAULT_NEW_ALIGNMENT__ * 2>; // expected-error {{deleted}}
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auto *b2a = new Both2<__STDCPP_DEFAULT_NEW_ALIGNMENT__>; // expected-error {{deleted}}
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auto *b2b = new Both2<__STDCPP_DEFAULT_NEW_ALIGNMENT__ * 2>;
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auto *b1ap = new (arg) Both1<__STDCPP_DEFAULT_NEW_ALIGNMENT__, Arg>;
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auto *b1bp = new (arg) Both1<__STDCPP_DEFAULT_NEW_ALIGNMENT__ * 2, Arg>; // expected-error {{deleted}}
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auto *b2ap = new (arg) Both2<__STDCPP_DEFAULT_NEW_ALIGNMENT__, Arg>; // expected-error {{deleted}}
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auto *b2bp = new (arg) Both2<__STDCPP_DEFAULT_NEW_ALIGNMENT__ * 2, Arg>;
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// Note that the aligned form can select a function with a parameter different
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// from std::align_val_t.
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struct alignas(__STDCPP_DEFAULT_NEW_ALIGNMENT__ * 2) WeirdAlignedAlloc1 {
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void *operator new(size_t, ...) = delete; // expected-note 2{{deleted}}
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};
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auto *waa1 = new WeirdAlignedAlloc1; // expected-error {{deleted}}
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auto *waa1p = new (arg) WeirdAlignedAlloc1; // expected-error {{deleted}}
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struct alignas(__STDCPP_DEFAULT_NEW_ALIGNMENT__ * 2) WeirdAlignedAlloc2 {
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template<typename ...T>
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void *operator new(size_t, T...) {
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using U = void(T...); // expected-note 2{{previous}}
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using U = void; // expected-error {{different types ('void' vs 'void (std::align_val_t)')}} \
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expected-error {{different types ('void' vs 'void (std::align_val_t, Arg)')}}
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}
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};
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auto *waa2 = new WeirdAlignedAlloc2; // expected-note {{instantiation of}}
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auto *waa2p = new (arg) WeirdAlignedAlloc2; // expected-note {{instantiation of}}
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