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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);
}
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