std::error_code::operator bool - cppreference.com (original) (raw)
| Member functions |
|---|
| error_code::error_code |
| error_code::operator= |
| error_code::assign |
| Modifiers |
| error_code::clear |
| Observers |
| error_code::value |
| error_code::category |
| error_code::default_error_condition |
| error_code::message |
| error_code::operator bool |
| Non-member functions |
| operator==operator!=operator<operator<=>(until C++20)(until C++20)(C++20) |
| operator<< |
| Helper classes |
| is_error_code_enum |
| hashstd::error\_code |
| explicit operator bool() const noexcept; | | (since C++11) | | ---------------------------------------- | | ------------- |
Checks if the error code value is valid, i.e. non-zero.
[edit] Parameters
(none)
[edit] Return value
false if value() == 0, true otherwise.
[edit] Notes
Although this operator is often used as a convenient shorthand to check if any error was returned, as in if (ec) { /* handle error */ }, such use is not robust: some error codes, for example, HTTP status code 200, may indicate success as well.