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std:: unstoppable_token

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헤더 파일에 정의됨 <stop_token>
template < class Token >

concept unstoppable_token =
std :: stoppable_token < Token > &&
requires ( const Token tok ) {
requires std:: bool_constant < ( ! tok. stop_possible ( ) ) > :: value ;

} ;
(C++26부터)

unstoppable_token<Token> 개념은 stoppable_token 에 대한 추가 요구사항을 지정하며, 이 타입은 중지를 허용하지 않습니다. 즉, tok. stop_possible ( ) 표현식은 상수 표현식에서 사용 가능해야 하며 false 를 반환해야 합니다.