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// PR c++/87378
// { 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 S1 { S1(S1 &&); };
struct S2 : S1 {};
S1
f (S2 s)
{
return std::move(s); // { dg-warning "redundant move in return statement" "" { target c++20 } }
}
struct R1 {
R1(R1 &&);
R1(const R1 &&);
};
struct R2 : R1 {};
R1
f2 (const R2 s)
{
return std::move(s); // { dg-warning "redundant move in return statement" "" { target c++20 } }
}
struct T1 {
T1(const T1 &);
T1(T1 &&);
T1(const T1 &&);
};
struct T2 : T1 {};
T1
f3 (const T2 s)
{
// Without std::move: const T1 &
// With std::move: const T1 &&
return std::move(s); // { dg-warning "redundant move in return statement" "" { target c++20 } }
}
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