std::error_category::equivalent (3) Linux Manual Page

std::error_category::equivalent – std::error_category::equivalent

Synopsis

virtual bool equivalent(int code, (1)(since C++ 11)

                                      const std::error_condition &condition) const noexcept;

virtual bool equivalent(const std::error_code &code, (2)(since C++ 11)

                                                         int condition) const noexcept;

Checks whether error code is equivalent to an error condition for the error category represented by *this.
1) Equivalent to default_error_condition(code) == condition.
2) Equivalent to *this == code.category() && code.value() == condition.

Parameters

code – specifies the error code to compare
condition – specifies the error condition to compare

Return value

true if the error code is equivalent to the given error condition for the error category represented by *this, false otherwise.