Method parseDefaultFunc

parse/parse.go:303–333

parses the ${parameter=word} string function parses the ${parameter:=word} string function parses the ${parameter:-word} string function parses the ${parameter:?word} string function parses the ${parameter:+word} string function

(name string)

// parses the ${parameter:?word} string function
// parses the ${parameter:+word} string function
func (t *Tree) parseDefaultFunc(name string) (Node, error) {
	node := new(FuncNode)
	node.Param = name

	t.scanner.accept = acceptDefaultFunc
	if t.scanner.peek() == '=' {
		t.scanner.accept = acceptOneEqual
	}
	t.scanner.mode = scanIdent
	switch t.scanner.scan() {
	case tokenIdent:
		node.Name = t.scanner.string()
	default:
		return nil, ErrParseDefaultFunction
	}

	// loop through all possible runes in default param
	for {
		// this acts as the break condition. Peek to see if we reached the end
		switch t.scanner.peek() {
		case '}':
			return node, t.consumeRbrack()
		}
		param, err := t.parseParam(acceptNotClosing, scanIdent)
		if err != nil {
			return nil, err
		}

		node.Args = append(node.Args, param)
	}
}

// parses the ${param,} string function
// parses the ${param,,} string function