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view gcc/testsuite/g++.dg/cpp0x/Wredundant-move4.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
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// PR c++/87029 // { dg-do compile { target c++11 } } // { dg-options "-Wredundant-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 { T() { } T(const T&) { } T(T&&) { } }; struct U { U() { } U(const U&) { } U(U&&) { } U(T) { } }; U fn1 (T t, bool b) { if (b) return t; else return std::move (t); // { dg-warning "redundant move in return statement" } } U fn2 (bool b) { T t; if (b) return t; else return std::move (t); // { dg-warning "redundant move in return statement" } } U fn3 (bool b) { static T t; if (b) return t; else return std::move (t); } T g; U fn4 (bool b) { if (b) return g; else return std::move (g); } long int fn5 (bool b) { int i = 42; if (b) return i; else return std::move (i); }