unicode-regex/lib/index.js

regular expression for matching unicode category

import { Charset } from 'regexp-util';
import * as data from './data.generated/index.js';
export default function unicode(categories) {
    const keys = Object.keys(categories);
    if (keys.length === 0) {
        throw new Error(`Expected at least one category, but received 0.`);
    }
    if (keys.some(key => {
        const subCategories = categories[key];
        return subCategories === undefined || subCategories.length === 0;
    })) {
        throw new Error(`Expected at least one sub category, but received 0.`);
    }
    const charsets = keys.map(category => {
        const subCategories = categories[category];
        const subCharsets = subCategories.map(subCategory => getCharset(category, subCategory));
        return new Charset().union(...subCharsets);
    });
    return charsets.reduce((a, b) => a.intersect(b));
}
function getCharset(category, subCategory) {
    const categoryData = data[category];
    const charsetInputs = categoryData[subCategory];
    return new Charset().union(...charsetInputs);
}