StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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58 lines
1.7 KiB
58 lines
1.7 KiB
4 years ago
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var isNumber = require('../../tokenizer').isNumber;
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var TYPE = require('../../tokenizer').TYPE;
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var NUMBER = TYPE.Number;
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var SOLIDUS = TYPE.Solidus;
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var FULLSTOP = TYPE.FullStop;
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// Terms of <ratio> should to be a positive number (not zero or negative)
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// (see https://drafts.csswg.org/mediaqueries-3/#values)
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// However, -o-min-device-pixel-ratio takes fractional values as a ratio's term
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// and this is using by various sites. Therefore we relax checking on parse
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// to test a term is unsigned number without exponent part.
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// Additional checks may to be applied on lexer validation.
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function consumeNumber(scanner) {
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var value = scanner.consumeNonWS(NUMBER);
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for (var i = 0; i < value.length; i++) {
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var code = value.charCodeAt(i);
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if (!isNumber(code) && code !== FULLSTOP) {
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scanner.error('Unsigned number is expected', scanner.tokenStart - value.length + i);
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}
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}
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if (Number(value) === 0) {
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scanner.error('Zero number is not allowed', scanner.tokenStart - value.length);
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}
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return value;
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}
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// <positive-integer> S* '/' S* <positive-integer>
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module.exports = {
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name: 'Ratio',
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structure: {
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left: String,
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right: 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 left = consumeNumber(this.scanner);
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var right;
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this.scanner.eatNonWS(SOLIDUS);
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right = consumeNumber(this.scanner);
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return {
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type: 'Ratio',
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loc: this.getLocation(start, this.scanner.tokenStart),
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left: left,
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right: right
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};
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},
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generate: function(node) {
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this.chunk(node.left);
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this.chunk('/');
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this.chunk(node.right);
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}
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};
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