48 lines
1.5 KiB
Plaintext
48 lines
1.5 KiB
Plaintext
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'use strict';
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var Scalar = require('../../nodes/Scalar.js');
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var stringifyNumber = require('../../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))$/,
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resolve: str => str.slice(-3).toLowerCase() === 'nan'
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? NaN
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: str[0] === '-'
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? Number.NEGATIVE_INFINITY
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: Number.POSITIVE_INFINITY,
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stringify: stringifyNumber.stringifyNumber
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};
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const floatExp = {
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identify: value => typeof value === 'number',
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default: true,
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tag: 'tag:yaml.org,2002:float',
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format: 'EXP',
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test: /^[-+]?(?:\.[0-9]+|[0-9]+(?:\.[0-9]*)?)[eE][-+]?[0-9]+$/,
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resolve: str => parseFloat(str),
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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.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.Scalar(parseFloat(str));
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const dot = str.indexOf('.');
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if (dot !== -1 && str[str.length - 1] === '0')
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node.minFractionDigits = str.length - dot - 1;
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return node;
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},
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stringify: stringifyNumber.stringifyNumber
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};
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exports.float = float;
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exports.floatExp = floatExp;
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exports.floatNaN = floatNaN;
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