module.exports = {
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name: 'Nth',
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structure: {
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nth: ['AnPlusB', 'Identifier'],
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selector: ['SelectorList', null]
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},
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parse: function(allowOfClause) {
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this.scanner.skipSC();
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var start = this.scanner.tokenStart;
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var end = start;
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var selector = null;
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var query;
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if (this.scanner.lookupValue(0, 'odd') || this.scanner.lookupValue(0, 'even')) {
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query = this.Identifier();
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} else {
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query = this.AnPlusB();
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}
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this.scanner.skipSC();
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if (allowOfClause && this.scanner.lookupValue(0, 'of')) {
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this.scanner.next();
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selector = this.SelectorList();
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if (this.needPositions) {
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end = this.getLastListNode(selector.children).loc.end.offset;
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}
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} else {
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if (this.needPositions) {
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end = query.loc.end.offset;
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}
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}
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return {
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type: 'Nth',
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loc: this.getLocation(start, end),
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nth: query,
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selector: selector
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};
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},
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generate: function(node) {
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this.node(node.nth);
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if (node.selector !== null) {
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this.chunk(' of ');
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this.node(node.selector);
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}
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}
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};
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