std::error_condition::operatorbool (3) - Linux Manuals
std::error_condition::operatorbool: std::error_condition::operatorbool
NAME
std::error_condition::operatorbool - std::error_condition::operatorbool
Synopsis
explicit operator bool() const noexcept; (since C++11)
Checks whether the stored error code is not zero.
Parameters
(none)
Return value
true if value != 0, false otherwise.