std::experimental::void_t
From cppreference.com
< cpp | experimental
| Defined in header <experimental/type_traits>
|
||
| template< class... > using void_t = void; |
(library fundamentals TS v2) | |
A utility metafunction that maps a sequence of any types to the type void.
Notes
This utility metafunction is used in template metaprogramming to detect ill-formed types in SFINAE context. First voted into C++17 as std::void_t, it was later added as well to the library fundamentals TS as std::experimental::void_t, because it is a dependency of the detection idiom.
See also
| (C++17) |
void variadic alias template (alias template) |