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46 lines
1.5 KiB
JavaScript
46 lines
1.5 KiB
JavaScript
import { Scalar } from '../../nodes/Scalar.js';
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import { stringifyNumber } from '../../stringify/stringifyNumber.js';
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const floatNaN = {
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identify: value => typeof value === 'number',
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default: true,
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tag: 'tag:yaml.org,2002:float',
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test: /^[-+]?\.(?:inf|Inf|INF|nan|NaN|NAN)$/,
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resolve: (str) => str.slice(-3).toLowerCase() === 'nan'
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? NaN
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: str[0] === '-'
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? Number.NEGATIVE_INFINITY
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: Number.POSITIVE_INFINITY,
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stringify: stringifyNumber
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};
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const floatExp = {
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identify: value => typeof value === 'number',
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default: true,
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tag: 'tag:yaml.org,2002:float',
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format: 'EXP',
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test: /^[-+]?(?:[0-9][0-9_]*)?(?:\.[0-9_]*)?[eE][-+]?[0-9]+$/,
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resolve: (str) => parseFloat(str.replace(/_/g, '')),
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stringify(node) {
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const num = Number(node.value);
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return isFinite(num) ? num.toExponential() : stringifyNumber(node);
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}
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};
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const float = {
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identify: value => typeof value === 'number',
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default: true,
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tag: 'tag:yaml.org,2002:float',
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test: /^[-+]?(?:[0-9][0-9_]*)?\.[0-9_]*$/,
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resolve(str) {
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const node = new Scalar(parseFloat(str.replace(/_/g, '')));
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const dot = str.indexOf('.');
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if (dot !== -1) {
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const f = str.substring(dot + 1).replace(/_/g, '');
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if (f[f.length - 1] === '0')
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node.minFractionDigits = f.length;
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}
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return node;
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},
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stringify: stringifyNumber
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};
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export { float, floatExp, floatNaN };
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