54 lines
1.4 KiB
JavaScript
54 lines
1.4 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
const {isNumberLiteral, isBigIntLiteral} = require('../ast/index.js');
|
||
|
|
|
||
|
|
// Determine whether this node is a decimal integer literal.
|
||
|
|
// Copied from https://github.com/eslint/eslint/blob/cc4871369645c3409dc56ded7a555af8a9f63d51/lib/rules/utils/ast-utils.js#L1237
|
||
|
|
const DECIMAL_INTEGER_PATTERN = /^(?:0|0[0-7]*[89]\d*|[1-9](?:_?\d)*)$/u;
|
||
|
|
const isDecimalInteger = text => DECIMAL_INTEGER_PATTERN.test(text);
|
||
|
|
const isDecimalIntegerNode = node => isNumberLiteral(node) && isDecimalInteger(node.raw);
|
||
|
|
|
||
|
|
const isNumeric = node => isNumberLiteral(node) || isBigIntLiteral(node);
|
||
|
|
const isLegacyOctal = node => isNumberLiteral(node) && /^0\d+$/.test(node.raw);
|
||
|
|
|
||
|
|
function getPrefix(text) {
|
||
|
|
let prefix = '';
|
||
|
|
let data = text;
|
||
|
|
|
||
|
|
if (/^0[box]/i.test(text)) {
|
||
|
|
prefix = text.slice(0, 2);
|
||
|
|
data = text.slice(2);
|
||
|
|
}
|
||
|
|
|
||
|
|
return {prefix, data};
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseNumber(text) {
|
||
|
|
const {
|
||
|
|
number,
|
||
|
|
mark = '',
|
||
|
|
sign = '',
|
||
|
|
power = '',
|
||
|
|
} = text.match(/^(?<number>[\d._]*?)(?:(?<mark>[Ee])(?<sign>[+-])?(?<power>[\d_]+))?$/).groups;
|
||
|
|
|
||
|
|
return {number, mark, sign, power};
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseFloatNumber(text) {
|
||
|
|
const parts = text.split('.');
|
||
|
|
const [integer, fractional = ''] = parts;
|
||
|
|
const dot = parts.length === 2 ? '.' : '';
|
||
|
|
|
||
|
|
return {integer, dot, fractional};
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
isDecimalIntegerNode,
|
||
|
|
isDecimalInteger,
|
||
|
|
isNumeric,
|
||
|
|
isLegacyOctal,
|
||
|
|
getPrefix,
|
||
|
|
parseNumber,
|
||
|
|
parseFloatNumber,
|
||
|
|
};
|