std::experimental::void_t

 

C++

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Library fundamentals v2

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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

void_t (C++17)

void variadic alias template (alias template)