Esempio n. 1
0
File: for.go Progetto: get3w/get3w
func ForFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
	name := p.ReadName()
	if len(name) == 0 {
		return nil, p.Error("Invalid variable name in for tag")
	}
	if p.SkipSpaces() != 'i' || p.Left() < 3 || p.Data[p.Position+1] != 'n' || !core.IsTokenEnd(p.Data[p.Position+2]) {
		return nil, p.Error("Expecting keyword 'in' after variable name in for tag")
	}
	p.ForwardBy(2)

	value, err := p.ReadValue()
	if err != nil {
		return nil, err
	}

	f := &For{
		Common:    NewCommon(),
		name:      name,
		keyName:   name + "[0]",
		valueName: name + "[1]",
		value:     value,
	}

	for {
		name := p.ReadName()
		if name == "" {
			break
		}
		if name == "limit" {
			if p.SkipUntil(':') != ':' {
				return nil, p.Error("Expecting ':' after limit in for tag")
			}
			p.Forward()
			limit, err := p.ReadValue()
			if err != nil {
				return nil, err
			}
			f.limit = limit
		} else if name == "offset" {
			if p.SkipUntil(':') != ':' {
				return nil, p.Error("Expecting ':' after offset in for tag")
			}
			p.Forward()
			offset, err := p.ReadValue()
			if err != nil {
				return nil, err
			}
			f.offset = offset
		} else if name == "reverse" {
			f.reverse = true
		} else {
			return nil, p.Error(fmt.Sprint("%q is an inknown modifier in for tag", name))
		}
	}
	p.SkipPastTag()
	return f, nil
}