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)