# std::nostopstate, std::nostopstate_t

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< cpp‎ | thread‎ | stop source

Defined in header `<stop_token>` |  |
struct nostopstate_t { explicit nostopstate_t() = default; }; | (1) | (since C++20)
inline constexpr std::nostopstate_t nostopstate {}; | (2) | (since C++20)

1) Empty tag type intended for use as a placeholder in std::stop_source non-default constructor, that makes the constructed std::stop_source empty with no associated stop-state.
2) The corresponding constant object instance of `std::nostopstate_t` for use in constructing an empty std::stop_source, as a placeholder value in the non-default constructor.

### See also

stop_source (C++20) | class representing a request to stop one or more std::jthreads (class)

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