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std::is_invocable

std::is_invocable, std::is_invocable_r, std::is_nothrow_invocable, std::is_nothrow_invocable_r

Defined in header <type_traits> 
template <class Fn, class... ArgTypes>
struct is_invocable;
 (1) (since C++17) 
template <class R, class Fn, class... ArgTypes>
struct is_invocable_r;
 (2) (since C++17) 
template <class Fn, class... ArgTypes>
struct is_nothrow_invocable;登录查看完整内容