std::stoppable_token - cppreference.com (original) (raw)
| Defined in header <stop_token> | | | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | ------------------- | | template< class Token > concept stoppable_token = requires (const Token tok) { typename /*check-type-alias-exists*/<Token::template callback_type>; { tok.stop_requested() } noexcept -> std::same_as<bool>; { tok.stop_possible() } noexcept -> std::same_as<bool>; { Token(tok) } noexcept; // see implicit expression variations } && std::copyable<Token> && std::equality_comparable<Token>; | | (since C++26) | | Helper templates | | | | template< template<class> class > struct /*check-type-alias-exists*/; // not defined | | (exposition only*) |
The concept stoppable_token<Token> specifies the basic interface of a stop token that is copyable and equality_comparable and allows polling to see if the stop request is possible and whether the request has been made.