Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp0x/Wpessimizing-move3.C @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 84e7813d76e9 |
children |
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// PR c++/86981 // { dg-do compile { target c++11 } } // { dg-options "-Wpessimizing-move" } // Define std::move. namespace std { template<typename _Tp> struct remove_reference { typedef _Tp type; }; template<typename _Tp> struct remove_reference<_Tp&> { typedef _Tp type; }; template<typename _Tp> struct remove_reference<_Tp&&> { typedef _Tp type; }; template<typename _Tp> constexpr typename std::remove_reference<_Tp>::type&& move(_Tp&& __t) noexcept { return static_cast<typename std::remove_reference<_Tp>::type&&>(__t); } } struct T { }; struct U { U(T); }; template<typename Tp> T fn1 () { T t; // Non-dependent type. return std::move (t); // { dg-warning "moving a local object in a return statement prevents copy elision" } } template<typename Tp1, typename Tp2> Tp1 fn2 () { Tp2 t; return std::move (t); // { dg-warning "moving a local object in a return statement prevents copy elision" } } template<typename Tp1, typename Tp2> Tp1 fn3 () { Tp2 t; return std::move (t); } int main () { fn1<T>(); fn2<T, T>(); fn3<U, T>(); }