Method parseParam

parse/parse.go:131–148

parse a substitution function parameter.

(accept acceptFunc, mode byte)

// parse a substitution function parameter.
func (t *Tree) parseParam(accept acceptFunc, mode byte) (Node, error) {
	t.scanner.accept = accept
	t.scanner.mode = mode | scanLbrack
	switch t.scanner.scan() {
	case tokenLbrack:
		return t.parseFunc()
	case tokenIdent:
		return newTextNode(
			t.scanner.string(),
		), nil
	case tokenRbrack:
		return newTextNode(
			t.scanner.string(),
		), nil
	default:
		return nil, ErrParseFuncSubstitution
	}
}

// parse either a default or substring substitution function.
func (t *Tree) parseDefaultOrSubstr(name string) (Node, error) {