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Filename : float.js
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'use strict';

var Scalar = require('../../nodes/Scalar.js');
var stringifyNumber = require('../../stringify/stringifyNumber.js');

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

exports.float = float;
exports.floatExp = floatExp;
exports.floatNaN = floatNaN;