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Member functions | ||||
Modifiers | ||||
Observers | ||||
error_code::operator bool | ||||
Non-member functions | ||||
(until C++20)(until C++20)(C++20) | ||||
Helper classes | ||||
explicit operatorbool()constnoexcept; | (since C++11) | |
Checks if the error code value is valid, i.e. non-zero.
(none)
false ifvalue()==0,true otherwise.
Although this operator is often used as a convenient shorthand to check if any error was returned, as inif(ec){/* handle error */}, such use is not robust: some error codes, for example, HTTP status code200, may indicate success as well.