Method error

parser/error.go:72–91

(place interface{}, msg string, msgValues ...interface{})

}

func (self *_parser) error(place interface{}, msg string, msgValues ...interface{}) *Error {
	idx := file.Idx(0)
	switch place := place.(type) {
	case int:
		idx = self.idxOf(place)
	case file.Idx:
		if place == 0 {
			idx = self.idxOf(self.chrOffset)
		} else {
			idx = place
		}
	default:
		panic(fmt.Errorf("error(%T, ...)", place))
	}

	position := self.position(idx)
	msg = fmt.Sprintf(msg, msgValues...)
	self.errors.Add(position, msg)
	return self.errors[len(self.errors)-1]
}

func (self *_parser) errorUnexpected(idx file.Idx, chr rune) error {
	if chr == -1 {