@@ -2121,6 +2121,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{ };
#endif
+ /// add_pointer
+#if _GLIBCXX_USE_BUILTIN_TRAIT(__add_pointer)
+ template<typename _Tp>
+ struct add_pointer
+ { using type = __add_pointer(_Tp); };
+#else
template<typename _Tp, typename = void>
struct __add_pointer_helper
{ using type = _Tp; };
@@ -2129,7 +2135,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
struct __add_pointer_helper<_Tp, __void_t<_Tp*>>
{ using type = _Tp*; };
- /// add_pointer
template<typename _Tp>
struct add_pointer
: public __add_pointer_helper<_Tp>
@@ -2142,6 +2147,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Tp>
struct add_pointer<_Tp&&>
{ using type = _Tp*; };
+#endif
#if __cplusplus > 201103L
/// Alias template for remove_pointer
This patch optimizes the compilation performance of std::add_pointer by dispatching to the new __add_pointer built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (add_pointer): Use __add_pointer built-in trait. Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org> --- libstdc++-v3/include/std/type_traits | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)