23 lines · cpp
1// RUN: %clang_cc1 -std=c++20 -verify %s -DBUILTIN=builtin2// RUN: %clang_cc1 -std=c++20 -verify %s -DBUILTIN=nobuiltin -fno-builtin3// RUN: %clang_cc1 -std=c++20 -verify %s -DBUILTIN=nobuiltin -fno-builtin-std-move -fno-builtin-std-move_if_noexcept -fno-builtin-std-forward -fno-builtin-std-forward_like4// RUN: %clang_cc1 -std=c++20 -verify %s -DBUILTIN=nobuiltin -ffreestanding5// expected-no-diagnostics6 7int nobuiltin;8 9namespace std {10 template<typename T> constexpr T &&move(T &x) { return (T&&)nobuiltin; }11 template<typename T> constexpr T &&move_if_noexcept(T &x) { return (T&&)nobuiltin; }12 template<typename T> constexpr T &&forward(T &x) { return (T&&)nobuiltin; }13 template<typename U, typename T> constexpr T &&forward_like(T &X) { return (T&&)nobuiltin; }14}15 16template<typename T> constexpr T *addr(T &&r) { return &r; }17 18int builtin;19static_assert(addr(std::move(builtin)) == &BUILTIN);20static_assert(addr(std::move_if_noexcept(builtin)) == &BUILTIN);21static_assert(addr(std::forward(builtin)) == &BUILTIN);22static_assert(addr(std::forward_like<int&>(builtin)) == &BUILTIN);23