Return true if the specified lhs and rhs refer to the same stop state, or if neither refers to a stop state; false otherwise. Implementation note: this function is required by the standard to be a hidden friend ([hidden.friends], [stoptoken.general]).
Declared in <bslstl_stoptoken.h>
[[nodiscard]]
bool
operator==(
stop_token const& lhs,
stop_token const& rhs) noexcept;
The return value should not be discarded.