`error.h`

This file defines the ErrorException class and the error function.

Class
ErrorException	This exception is thrown by calls to the `error` function, which makes it possible for clients to respond to error conditions.
Function
error(msg)	Signals an error condition in a program by throwing an `ErrorException` with the specified message.

Function detail

void error(string str);

Signals an error condition in a program by throwing an ErrorException with the specified message.

Usage:

error(msg);