std::stoppable_token

 

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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.

See also

unstoppable_token (C++26)

specifies a stop token that does not allow stopping (concept)