diff options
Diffstat (limited to 'libcxx/include')
| -rw-r--r-- | libcxx/include/memory | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/libcxx/include/memory b/libcxx/include/memory index d6b427b941b..56502e2a15a 100644 --- a/libcxx/include/memory +++ b/libcxx/include/memory @@ -5597,6 +5597,16 @@ struct __temp_value { }; #endif +#if _LIBCPP_STD_VER > 14 +template<typename _Alloc, typename = void> +struct __is_allocator : false_type {}; + +template<typename _Alloc> +struct __is_allocator<_Alloc, + void_t<typename _Alloc::value_type, decltype(_VSTD::declval<_Alloc&>().allocate(size_t{}))>> + : true_type {}; +#endif + _LIBCPP_END_NAMESPACE_STD _LIBCPP_POP_MACROS |
