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Add missing _v traits. is_bind_expression_v, is_placeholder_v and uses_allocator_v

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@282126 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow
2016-09-22 00:23:15 +00:00
parent fd4a3f6cef
commit 2fffe3a6ff
5 changed files with 62 additions and 10 deletions
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17
include/functional
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@@ -212,6 +212,13 @@ template <class F> unspecified not_fn(F&& f); // C++17
template<class T> struct is_bind_expression;
template<class T> struct is_placeholder;
// See C++14 20.9.9, Function object binders
template <class T> constexpr bool is_bind_expression_v
= is_bind_expression<T>::value; // C++17
template <class T> constexpr int is_placeholder_v
= is_placeholder<T>::value; // C++17
template<class Fn, class... BoundArgs>
unspecified bind(Fn&&, BoundArgs&&...);
template<class R, class Fn, class... BoundArgs>
@@ -1970,10 +1977,20 @@ template<class _Tp> struct __is_bind_expression : public false_type {};
template<class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_bind_expression
: public __is_bind_expression<typename remove_cv<_Tp>::type> {};
#if _LIBCPP_STD_VER > 14
template <class _Tp>
constexpr size_t is_bind_expression_v = is_bind_expression<_Tp>::value;
#endif
template<class _Tp> struct __is_placeholder : public integral_constant<int, 0> {};
template<class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_placeholder
: public __is_placeholder<typename remove_cv<_Tp>::type> {};
#if _LIBCPP_STD_VER > 14
template <class _Tp>
constexpr size_t is_placeholder_v = is_placeholder<_Tp>::value;
#endif
namespace placeholders
{