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Showing content from https://en.cppreference.com/w/cpp/language/../error/error_code/../../thread/never_stop_token.html below:

std::never_stop_token - cppreference.com

class never_stop_token;

(since C++26)

The never_stop_token class models unstoppable_token that provides static information that a stop is never possible nor requested. It is the default stop token type returned by std::get_stop_token if no other associated stop token is being provided in the queryable object.

[edit] Member alias templates Type Definition callback_type<Callback> /*callback-type*/
where the type is defined as: struct /*callback-type*/

{
    explicit /*callback-type*/( never_stop_token,
                                auto&& ) noexcept {}

}; (exposition only*) [edit] Member functions indicates that a stop can never be requested
(public static member function) indicates that a stop is not possible
(public static member function) compares two never_stop_token objects
(public member function) std::never_stop_token::stop_requested

static constexpr bool stop_requested() noexcept { return false; }

Always returns false, indicating that a stop can never be requested.

std::never_stop_token::stop_possible

static constexpr bool stop_possible() noexcept { return false; }

Always returns false, indicating that a stop is not possible.

std::never_stop_token::operator==

bool operator==(const never_stop_token&) const = default;

Two never_stop_token objects always compare equal.

[edit] Example

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