folly::is_invocable_r_v

True if invoking F yields a result convertible to R; mimics std::is_invocable_r_v.

Synopsis

Declared in <folly/functional/Invoke.h>

template<
    typename R,
    typename F,
    typename... A>
inline constexpr bool is_invocable_r_v = invoke_detail::is_invocable_r_v<void, R, F, A...>;