Method setParent

src/core/parser.js:293–302

(elt, parent)

    }

    setParent(elt, parent) {
        if (typeof elt === 'object') {
            elt.parent = parent;
            if (typeof parent === 'object') {
                parent.children = (parent.children || new Set());
                parent.children.add(elt)
            }
            this.setParent(elt.next, parent);
        }
    }

    parseURLOrExpression() {
        var cur = this.currentToken();