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view gcc/testsuite/g++.dg/cpp2a/is-constant-evaluated10.C @ 152:2b5abeee2509
update gcc11
author | anatofuz |
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date | Mon, 25 May 2020 07:50:57 +0900 |
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// { dg-do compile { target c++2a } } // { dg-options "-Wtautological-compare" } namespace std { constexpr inline bool is_constant_evaluated () noexcept { return __builtin_is_constant_evaluated (); } } template<typename> constexpr int foo(int i) { if constexpr (std::is_constant_evaluated ()) // { dg-warning ".std::is_constant_evaluated. always evaluates to true in .if constexpr." } return 42; else return i; } template<typename> constexpr int foo2(int i) { if constexpr (__builtin_is_constant_evaluated ()) // { dg-warning ".std::is_constant_evaluated. always evaluates to true in .if constexpr." } return 42; else return i; }