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feat: proposal for std::forward #51

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feat: proposal for std::forward #51

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5 changes: 3 additions & 2 deletions src/type_traits
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Original file line number Diff line number Diff line change
Expand Up @@ -82,8 +82,9 @@ namespace std{
typedef __true_type value;
};



template<typename T> struct remove_reference { typedef T type; };
template<typename T> struct remove_reference<T&> { typedef T type; };
template<typename T> struct remove_reference<T&&> { typedef T type; };
}

#pragma GCC visibility pop
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12 changes: 11 additions & 1 deletion src/utility
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,7 @@ namespace std{
pair(const T1& x, const T2& y) : first(x), second(y) { }
template<class U, class V> pair(const pair<U, V> &p) : first(p.first), second(p.second) { }
};

template <class T1, class T2> bool operator==(const pair<T1,T2>& x, const pair<T1,T2>& y){
using namespace rel_ops;
return (x.first == y.first && x.second==y.second);
Expand All @@ -79,8 +79,18 @@ namespace std{
template <class T1, class T2> pair<T1,T2> make_pair(const T1& x, const T2& y){
return pair<T1,T2>(x, y);
}
}

#include <type_traits>

namespace std {
template <class T> constexpr T&& forward(typename std::remove_reference<T>::type& t) noexcept{
return static_cast<T&&>(t);
}
template <class T> constexpr T&& forward(typename std::remove_reference<T>::type&& t) noexcept{
//static_assert(!std::is_lvalue_reference<T>::value, "Can not forward an rvalue as an lvalue.");
return static_cast<T&&>(t);
}
}

#pragma GCC visibility pop
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