func (p *parser) errorf(format string, args ...interface{}) {
	p.error(errors.Errorf(format, args...))
}
func (p *parser) errorf(format string, args ...interface{}) {
	p.error(errors.Errorf(format, args...))
}
func ( p * parser ) errorf ( format string , args ... interface { } ) { p . error ( errors . Errorf ( format , args ... ) ) }
// errorf formats the error and terminates processing.
errorf formats the error and terminates processing .