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3401f26 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | 'use strict';
const types = require('../../tokenizer/types.cjs');
const name = 'FeatureFunction';
const structure = {
kind: String,
feature: String,
value: ['Declaration', 'Selector']
};
function getFeatureParser(kind, name) {
const featuresOfKind = this.features[kind] || {};
const parser = featuresOfKind[name];
if (typeof parser !== 'function') {
this.error(`Unknown feature ${name}()`);
}
return parser;
}
function parse(kind = 'unknown') {
const start = this.tokenStart;
const functionName = this.consumeFunctionName();
const valueParser = getFeatureParser.call(this, kind, functionName.toLowerCase());
this.skipSC();
const value = this.parseWithFallback(
() => {
const startValueToken = this.tokenIndex;
const value = valueParser.call(this);
if (this.eof === false &&
this.isBalanceEdge(startValueToken) === false) {
this.error();
}
return value;
},
() => this.Raw(null, false)
);
if (!this.eof) {
this.eat(types.RightParenthesis);
}
return {
type: 'FeatureFunction',
loc: this.getLocation(start, this.tokenStart),
kind,
feature: functionName,
value
};
}
function generate(node) {
this.token(types.Function, node.feature + '(');
this.node(node.value);
this.token(types.RightParenthesis, ')');
}
exports.generate = generate;
exports.name = name;
exports.parse = parse;
exports.structure = structure;
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