Method wrapError

parser/parser_common.go:369–405

(err error)

}

func (p *Parser) wrapError(err error) error {
	if err == nil {
		return nil
	}

	lineNo := 0
	column := 0

	for i := 0; i < int(p.Pos()); i++ {
		if p.lexer.input[i] == '\n' {
			lineNo++
			column = 0
		} else {
			column++
		}
	}

	lines := strings.Split(p.lexer.input, "\n")
	var buf strings.Builder
	buf.WriteString(fmt.Sprintf("line %d:%d %s\n", lineNo, column, err.Error()))
	for i, line := range lines {
		if i == lineNo {
			buf.WriteString(line)
			buf.WriteByte('\n')
			for j := 0; j < column; j++ {
				buf.WriteByte(' ')
			}
			if p.last() != nil {
				buf.WriteString(strings.Repeat("^", len(p.last().String)))
			} else {
				buf.WriteString("^")
			}
			buf.WriteByte('\n')
		}
	}
	return errors.New(buf.String())
}

func (p *Parser) parseRatioExpr(pos Pos) (*RatioExpr, error) {
	numerator, err := p.parseNumber(pos)