605 lines
14 KiB
JavaScript
605 lines
14 KiB
JavaScript
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const IDENT_RE = '[A-Za-z$_][0-9A-Za-z$_]*';
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const KEYWORDS = [
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"as", // for exports
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"in",
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"of",
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"if",
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"for",
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"while",
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"finally",
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"var",
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"new",
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"function",
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"do",
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"return",
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"void",
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"else",
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"break",
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"catch",
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"instanceof",
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"with",
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"throw",
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"case",
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"default",
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"try",
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"switch",
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"continue",
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"typeof",
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"delete",
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"let",
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"yield",
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"const",
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"class",
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// JS handles these with a special rule
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// "get",
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// "set",
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"debugger",
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"async",
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"await",
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"static",
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"import",
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"from",
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"export",
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"extends"
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];
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const LITERALS = [
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"true",
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"false",
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"null",
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"undefined",
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"NaN",
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"Infinity"
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];
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const TYPES = [
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"Intl",
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"DataView",
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"Number",
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"Math",
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"Date",
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"String",
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"RegExp",
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"Object",
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"Function",
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"Boolean",
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"Error",
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"Symbol",
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"Set",
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"Map",
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"WeakSet",
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"WeakMap",
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"Proxy",
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"Reflect",
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"JSON",
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"Promise",
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"Float64Array",
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"Int16Array",
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"Int32Array",
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"Int8Array",
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"Uint16Array",
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"Uint32Array",
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"Float32Array",
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"Array",
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"Uint8Array",
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"Uint8ClampedArray",
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"ArrayBuffer",
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"BigInt64Array",
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"BigUint64Array",
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"BigInt"
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];
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const ERROR_TYPES = [
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"EvalError",
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"InternalError",
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"RangeError",
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"ReferenceError",
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"SyntaxError",
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"TypeError",
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"URIError"
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];
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const BUILT_IN_GLOBALS = [
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"setInterval",
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"setTimeout",
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"clearInterval",
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"clearTimeout",
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"require",
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"exports",
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"eval",
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"isFinite",
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"isNaN",
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"parseFloat",
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"parseInt",
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"decodeURI",
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"decodeURIComponent",
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"encodeURI",
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"encodeURIComponent",
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"escape",
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"unescape"
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];
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const BUILT_IN_VARIABLES = [
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"arguments",
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"this",
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"super",
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"console",
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"window",
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"document",
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"localStorage",
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"module",
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"global" // Node.js
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];
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const BUILT_INS = [].concat(
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BUILT_IN_GLOBALS,
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BUILT_IN_VARIABLES,
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TYPES,
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ERROR_TYPES
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);
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/**
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* @param {string} value
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* @returns {RegExp}
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* */
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/**
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* @param {RegExp | string } re
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* @returns {string}
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*/
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function source(re) {
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if (!re) return null;
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if (typeof re === "string") return re;
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return re.source;
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}
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/**
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* @param {RegExp | string } re
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* @returns {string}
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*/
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function lookahead(re) {
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return concat('(?=', re, ')');
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}
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/**
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* @param {...(RegExp | string) } args
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* @returns {string}
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*/
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function concat(...args) {
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const joined = args.map((x) => source(x)).join("");
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return joined;
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}
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/*
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Language: JavaScript
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Description: JavaScript (JS) is a lightweight, interpreted, or just-in-time compiled programming language with first-class functions.
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Category: common, scripting
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Website: https://developer.mozilla.org/en-US/docs/Web/JavaScript
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*/
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/** @type LanguageFn */
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function javascript(hljs) {
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/**
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* Takes a string like "<Booger" and checks to see
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* if we can find a matching "</Booger" later in the
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* content.
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* @param {RegExpMatchArray} match
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* @param {{after:number}} param1
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*/
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const hasClosingTag = (match, { after }) => {
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const tag = "</" + match[0].slice(1);
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const pos = match.input.indexOf(tag, after);
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return pos !== -1;
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};
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const IDENT_RE$1 = IDENT_RE;
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const FRAGMENT = {
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begin: '<>',
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end: '</>'
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};
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const XML_TAG = {
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begin: /<[A-Za-z0-9\\._:-]+/,
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end: /\/[A-Za-z0-9\\._:-]+>|\/>/,
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/**
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* @param {RegExpMatchArray} match
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* @param {CallbackResponse} response
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*/
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isTrulyOpeningTag: (match, response) => {
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const afterMatchIndex = match[0].length + match.index;
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const nextChar = match.input[afterMatchIndex];
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// nested type?
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// HTML should not include another raw `<` inside a tag
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// But a type might: `<Array<Array<number>>`, etc.
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if (nextChar === "<") {
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response.ignoreMatch();
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return;
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}
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// <something>
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// This is now either a tag or a type.
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if (nextChar === ">") {
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// if we cannot find a matching closing tag, then we
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// will ignore it
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if (!hasClosingTag(match, { after: afterMatchIndex })) {
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response.ignoreMatch();
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}
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}
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}
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};
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const KEYWORDS$1 = {
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$pattern: IDENT_RE,
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keyword: KEYWORDS,
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literal: LITERALS,
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built_in: BUILT_INS
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};
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// https://tc39.es/ecma262/#sec-literals-numeric-literals
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const decimalDigits = '[0-9](_?[0-9])*';
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const frac = `\\.(${decimalDigits})`;
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// DecimalIntegerLiteral, including Annex B NonOctalDecimalIntegerLiteral
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// https://tc39.es/ecma262/#sec-additional-syntax-numeric-literals
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const decimalInteger = `0|[1-9](_?[0-9])*|0[0-7]*[89][0-9]*`;
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const NUMBER = {
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className: 'number',
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variants: [
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// DecimalLiteral
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{ begin: `(\\b(${decimalInteger})((${frac})|\\.)?|(${frac}))` +
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`[eE][+-]?(${decimalDigits})\\b` },
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{ begin: `\\b(${decimalInteger})\\b((${frac})\\b|\\.)?|(${frac})\\b` },
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// DecimalBigIntegerLiteral
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{ begin: `\\b(0|[1-9](_?[0-9])*)n\\b` },
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// NonDecimalIntegerLiteral
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{ begin: "\\b0[xX][0-9a-fA-F](_?[0-9a-fA-F])*n?\\b" },
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{ begin: "\\b0[bB][0-1](_?[0-1])*n?\\b" },
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{ begin: "\\b0[oO][0-7](_?[0-7])*n?\\b" },
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// LegacyOctalIntegerLiteral (does not include underscore separators)
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// https://tc39.es/ecma262/#sec-additional-syntax-numeric-literals
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{ begin: "\\b0[0-7]+n?\\b" },
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],
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relevance: 0
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};
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const SUBST = {
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className: 'subst',
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begin: '\\$\\{',
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end: '\\}',
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keywords: KEYWORDS$1,
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contains: [] // defined later
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};
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const HTML_TEMPLATE = {
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begin: 'html`',
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end: '',
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starts: {
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end: '`',
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returnEnd: false,
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contains: [
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hljs.BACKSLASH_ESCAPE,
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SUBST
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],
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subLanguage: 'xml'
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}
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};
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const CSS_TEMPLATE = {
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begin: 'css`',
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end: '',
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starts: {
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end: '`',
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returnEnd: false,
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contains: [
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hljs.BACKSLASH_ESCAPE,
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SUBST
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],
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subLanguage: 'css'
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}
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};
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const TEMPLATE_STRING = {
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className: 'string',
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begin: '`',
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end: '`',
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contains: [
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hljs.BACKSLASH_ESCAPE,
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SUBST
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]
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};
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const JSDOC_COMMENT = hljs.COMMENT(
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/\/\*\*(?!\/)/,
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'\\*/',
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{
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relevance: 0,
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contains: [
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{
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className: 'doctag',
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begin: '@[A-Za-z]+',
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contains: [
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{
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className: 'type',
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begin: '\\{',
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end: '\\}',
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relevance: 0
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},
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{
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className: 'variable',
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begin: IDENT_RE$1 + '(?=\\s*(-)|$)',
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endsParent: true,
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relevance: 0
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},
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// eat spaces (not newlines) so we can find
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// types or variables
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{
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begin: /(?=[^\n])\s/,
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relevance: 0
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}
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]
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}
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]
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}
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);
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const COMMENT = {
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className: "comment",
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variants: [
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JSDOC_COMMENT,
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hljs.C_BLOCK_COMMENT_MODE,
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hljs.C_LINE_COMMENT_MODE
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]
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};
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const SUBST_INTERNALS = [
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hljs.APOS_STRING_MODE,
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hljs.QUOTE_STRING_MODE,
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HTML_TEMPLATE,
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CSS_TEMPLATE,
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TEMPLATE_STRING,
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NUMBER,
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hljs.REGEXP_MODE
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];
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SUBST.contains = SUBST_INTERNALS
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.concat({
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// we need to pair up {} inside our subst to prevent
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// it from ending too early by matching another }
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begin: /\{/,
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end: /\}/,
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keywords: KEYWORDS$1,
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contains: [
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"self"
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].concat(SUBST_INTERNALS)
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});
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const SUBST_AND_COMMENTS = [].concat(COMMENT, SUBST.contains);
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const PARAMS_CONTAINS = SUBST_AND_COMMENTS.concat([
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// eat recursive parens in sub expressions
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{
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begin: /\(/,
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end: /\)/,
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keywords: KEYWORDS$1,
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contains: ["self"].concat(SUBST_AND_COMMENTS)
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}
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]);
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const PARAMS = {
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className: 'params',
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begin: /\(/,
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end: /\)/,
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excludeBegin: true,
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excludeEnd: true,
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keywords: KEYWORDS$1,
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contains: PARAMS_CONTAINS
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};
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return {
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name: 'Javascript',
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aliases: ['js', 'jsx', 'mjs', 'cjs'],
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keywords: KEYWORDS$1,
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// this will be extended by TypeScript
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exports: { PARAMS_CONTAINS },
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illegal: /#(?![$_A-z])/,
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contains: [
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hljs.SHEBANG({
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label: "shebang",
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binary: "node",
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relevance: 5
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}),
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{
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label: "use_strict",
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className: 'meta',
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relevance: 10,
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begin: /^\s*['"]use (strict|asm)['"]/
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},
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hljs.APOS_STRING_MODE,
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hljs.QUOTE_STRING_MODE,
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HTML_TEMPLATE,
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CSS_TEMPLATE,
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TEMPLATE_STRING,
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COMMENT,
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NUMBER,
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{ // object attr container
|
||
|
|
begin: concat(/[{,\n]\s*/,
|
||
|
|
// we need to look ahead to make sure that we actually have an
|
||
|
|
// attribute coming up so we don't steal a comma from a potential
|
||
|
|
// "value" container
|
||
|
|
//
|
||
|
|
// NOTE: this might not work how you think. We don't actually always
|
||
|
|
// enter this mode and stay. Instead it might merely match `,
|
||
|
|
// <comments up next>` and then immediately end after the , because it
|
||
|
|
// fails to find any actual attrs. But this still does the job because
|
||
|
|
// it prevents the value contain rule from grabbing this instead and
|
||
|
|
// prevening this rule from firing when we actually DO have keys.
|
||
|
|
lookahead(concat(
|
||
|
|
// we also need to allow for multiple possible comments inbetween
|
||
|
|
// the first key:value pairing
|
||
|
|
/(((\/\/.*$)|(\/\*(\*[^/]|[^*])*\*\/))\s*)*/,
|
||
|
|
IDENT_RE$1 + '\\s*:'))),
|
||
|
|
relevance: 0,
|
||
|
|
contains: [
|
||
|
|
{
|
||
|
|
className: 'attr',
|
||
|
|
begin: IDENT_RE$1 + lookahead('\\s*:'),
|
||
|
|
relevance: 0
|
||
|
|
}
|
||
|
|
]
|
||
|
|
},
|
||
|
|
{ // "value" container
|
||
|
|
begin: '(' + hljs.RE_STARTERS_RE + '|\\b(case|return|throw)\\b)\\s*',
|
||
|
|
keywords: 'return throw case',
|
||
|
|
contains: [
|
||
|
|
COMMENT,
|
||
|
|
hljs.REGEXP_MODE,
|
||
|
|
{
|
||
|
|
className: 'function',
|
||
|
|
// we have to count the parens to make sure we actually have the
|
||
|
|
// correct bounding ( ) before the =>. There could be any number of
|
||
|
|
// sub-expressions inside also surrounded by parens.
|
||
|
|
begin: '(\\(' +
|
||
|
|
'[^()]*(\\(' +
|
||
|
|
'[^()]*(\\(' +
|
||
|
|
'[^()]*' +
|
||
|
|
'\\)[^()]*)*' +
|
||
|
|
'\\)[^()]*)*' +
|
||
|
|
'\\)|' + hljs.UNDERSCORE_IDENT_RE + ')\\s*=>',
|
||
|
|
returnBegin: true,
|
||
|
|
end: '\\s*=>',
|
||
|
|
contains: [
|
||
|
|
{
|
||
|
|
className: 'params',
|
||
|
|
variants: [
|
||
|
|
{
|
||
|
|
begin: hljs.UNDERSCORE_IDENT_RE,
|
||
|
|
relevance: 0
|
||
|
|
},
|
||
|
|
{
|
||
|
|
className: null,
|
||
|
|
begin: /\(\s*\)/,
|
||
|
|
skip: true
|
||
|
|
},
|
||
|
|
{
|
||
|
|
begin: /\(/,
|
||
|
|
end: /\)/,
|
||
|
|
excludeBegin: true,
|
||
|
|
excludeEnd: true,
|
||
|
|
keywords: KEYWORDS$1,
|
||
|
|
contains: PARAMS_CONTAINS
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
]
|
||
|
|
},
|
||
|
|
{ // could be a comma delimited list of params to a function call
|
||
|
|
begin: /,/, relevance: 0
|
||
|
|
},
|
||
|
|
{
|
||
|
|
className: '',
|
||
|
|
begin: /\s/,
|
||
|
|
end: /\s*/,
|
||
|
|
skip: true
|
||
|
|
},
|
||
|
|
{ // JSX
|
||
|
|
variants: [
|
||
|
|
{ begin: FRAGMENT.begin, end: FRAGMENT.end },
|
||
|
|
{
|
||
|
|
begin: XML_TAG.begin,
|
||
|
|
// we carefully check the opening tag to see if it truly
|
||
|
|
// is a tag and not a false positive
|
||
|
|
'on:begin': XML_TAG.isTrulyOpeningTag,
|
||
|
|
end: XML_TAG.end
|
||
|
|
}
|
||
|
|
],
|
||
|
|
subLanguage: 'xml',
|
||
|
|
contains: [
|
||
|
|
{
|
||
|
|
begin: XML_TAG.begin,
|
||
|
|
end: XML_TAG.end,
|
||
|
|
skip: true,
|
||
|
|
contains: ['self']
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
],
|
||
|
|
relevance: 0
|
||
|
|
},
|
||
|
|
{
|
||
|
|
className: 'function',
|
||
|
|
beginKeywords: 'function',
|
||
|
|
end: /[{;]/,
|
||
|
|
excludeEnd: true,
|
||
|
|
keywords: KEYWORDS$1,
|
||
|
|
contains: [
|
||
|
|
'self',
|
||
|
|
hljs.inherit(hljs.TITLE_MODE, { begin: IDENT_RE$1 }),
|
||
|
|
PARAMS
|
||
|
|
],
|
||
|
|
illegal: /%/
|
||
|
|
},
|
||
|
|
{
|
||
|
|
// prevent this from getting swallowed up by function
|
||
|
|
// since they appear "function like"
|
||
|
|
beginKeywords: "while if switch catch for"
|
||
|
|
},
|
||
|
|
{
|
||
|
|
className: 'function',
|
||
|
|
// we have to count the parens to make sure we actually have the correct
|
||
|
|
// bounding ( ). There could be any number of sub-expressions inside
|
||
|
|
// also surrounded by parens.
|
||
|
|
begin: hljs.UNDERSCORE_IDENT_RE +
|
||
|
|
'\\(' + // first parens
|
||
|
|
'[^()]*(\\(' +
|
||
|
|
'[^()]*(\\(' +
|
||
|
|
'[^()]*' +
|
||
|
|
'\\)[^()]*)*' +
|
||
|
|
'\\)[^()]*)*' +
|
||
|
|
'\\)\\s*\\{', // end parens
|
||
|
|
returnBegin:true,
|
||
|
|
contains: [
|
||
|
|
PARAMS,
|
||
|
|
hljs.inherit(hljs.TITLE_MODE, { begin: IDENT_RE$1 }),
|
||
|
|
]
|
||
|
|
},
|
||
|
|
// hack: prevents detection of keywords in some circumstances
|
||
|
|
// .keyword()
|
||
|
|
// $keyword = x
|
||
|
|
{
|
||
|
|
variants: [
|
||
|
|
{ begin: '\\.' + IDENT_RE$1 },
|
||
|
|
{ begin: '\\$' + IDENT_RE$1 }
|
||
|
|
],
|
||
|
|
relevance: 0
|
||
|
|
},
|
||
|
|
{ // ES6 class
|
||
|
|
className: 'class',
|
||
|
|
beginKeywords: 'class',
|
||
|
|
end: /[{;=]/,
|
||
|
|
excludeEnd: true,
|
||
|
|
illegal: /[:"[\]]/,
|
||
|
|
contains: [
|
||
|
|
{ beginKeywords: 'extends' },
|
||
|
|
hljs.UNDERSCORE_TITLE_MODE
|
||
|
|
]
|
||
|
|
},
|
||
|
|
{
|
||
|
|
begin: /\b(?=constructor)/,
|
||
|
|
end: /[{;]/,
|
||
|
|
excludeEnd: true,
|
||
|
|
contains: [
|
||
|
|
hljs.inherit(hljs.TITLE_MODE, { begin: IDENT_RE$1 }),
|
||
|
|
'self',
|
||
|
|
PARAMS
|
||
|
|
]
|
||
|
|
},
|
||
|
|
{
|
||
|
|
begin: '(get|set)\\s+(?=' + IDENT_RE$1 + '\\()',
|
||
|
|
end: /\{/,
|
||
|
|
keywords: "get set",
|
||
|
|
contains: [
|
||
|
|
hljs.inherit(hljs.TITLE_MODE, { begin: IDENT_RE$1 }),
|
||
|
|
{ begin: /\(\)/ }, // eat to avoid empty params
|
||
|
|
PARAMS
|
||
|
|
]
|
||
|
|
},
|
||
|
|
{
|
||
|
|
begin: /\$[(.]/ // relevance booster for a pattern common to JS libs: `$(something)` and `$.something`
|
||
|
|
}
|
||
|
|
]
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = javascript;
|