Method singleMatch

docopt.go:1039–1066

(left *patternList)

}

func (p *pattern) singleMatch(left *patternList) (int, *pattern) {
	if p.t&patternArgument != 0 {
		for n, pat := range *left {
			if pat.t&patternArgument != 0 {
				return n, newArgument(p.name, pat.value)
			}
		}
		return -1, nil
	} else if p.t&patternCommand != 0 {
		for n, pat := range *left {
			if pat.t&patternArgument != 0 {
				if pat.value == p.name {
					return n, newCommand(p.name, true)
				}
				break
			}
		}
		return -1, nil
	} else if p.t&patternOption != 0 {
		for n, pat := range *left {
			if p.name == pat.name {
				return n, pat
			}
		}
		return -1, nil
	}
	panic("unmatched type")
}

func (p *pattern) String() string {
	if p.t&patternOption != 0 {