56 lines
1.5 KiB
JavaScript
56 lines
1.5 KiB
JavaScript
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var TYPE = require('../../tokenizer').TYPE;
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var IDENT = TYPE.Ident;
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var PLUSSIGN = 0x002B; // U+002B PLUS SIGN (+)
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var SOLIDUS = 0x002F; // U+002F SOLIDUS (/)
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var GREATERTHANSIGN = 0x003E; // U+003E GREATER-THAN SIGN (>)
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var TILDE = 0x007E; // U+007E TILDE (~)
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// + | > | ~ | /deep/
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module.exports = {
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name: 'Combinator',
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structure: {
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name: String
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},
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parse: function() {
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var start = this.scanner.tokenStart;
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var code = this.scanner.source.charCodeAt(this.scanner.tokenStart);
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switch (code) {
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case GREATERTHANSIGN:
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case PLUSSIGN:
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case TILDE:
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this.scanner.next();
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break;
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case SOLIDUS:
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this.scanner.next();
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if (this.scanner.tokenType !== IDENT || this.scanner.lookupValue(0, 'deep') === false) {
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this.error('Identifier `deep` is expected');
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}
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this.scanner.next();
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if (!this.scanner.isDelim(SOLIDUS)) {
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this.error('Solidus is expected');
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}
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this.scanner.next();
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break;
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default:
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this.error('Combinator is expected');
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}
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return {
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type: 'Combinator',
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loc: this.getLocation(start, this.scanner.tokenStart),
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name: this.scanner.substrToCursor(start)
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};
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},
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generate: function(node) {
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this.chunk(node.name);
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}
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};
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