--- /dev/null
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+exports.shouldHighlight = shouldHighlight;
+exports.getChalk = getChalk;
+exports.default = highlight;
+
+var _helperValidatorIdentifier = require("@babel/helper-validator-identifier");
+
+const jsTokens = require("js-tokens");
+
+const Chalk = require("chalk");
+
+const sometimesKeywords = new Set(["as", "async", "from", "get", "of", "set"]);
+
+function getDefs(chalk) {
+ return {
+ keyword: chalk.cyan,
+ capitalized: chalk.yellow,
+ jsxIdentifier: chalk.yellow,
+ punctuator: chalk.yellow,
+ number: chalk.magenta,
+ string: chalk.green,
+ regex: chalk.magenta,
+ comment: chalk.grey,
+ invalid: chalk.white.bgRed.bold
+ };
+}
+
+const NEWLINE = /\r\n|[\n\r\u2028\u2029]/;
+const BRACKET = /^[()[\]{}]$/;
+let tokenize;
+{
+ const JSX_TAG = /^[a-z][\w-]*$/i;
+
+ const getTokenType = function (token, offset, text) {
+ if (token.type === "name") {
+ if ((0, _helperValidatorIdentifier.isKeyword)(token.value) || (0, _helperValidatorIdentifier.isStrictReservedWord)(token.value, true) || sometimesKeywords.has(token.value)) {
+ return "keyword";
+ }
+
+ if (JSX_TAG.test(token.value) && (text[offset - 1] === "<" || text.substr(offset - 2, 2) == "</")) {
+ return "jsxIdentifier";
+ }
+
+ if (token.value[0] !== token.value[0].toLowerCase()) {
+ return "capitalized";
+ }
+ }
+
+ if (token.type === "punctuator" && BRACKET.test(token.value)) {
+ return "bracket";
+ }
+
+ if (token.type === "invalid" && (token.value === "@" || token.value === "#")) {
+ return "punctuator";
+ }
+
+ return token.type;
+ };
+
+ tokenize = function* (text) {
+ let match;
+
+ while (match = jsTokens.default.exec(text)) {
+ const token = jsTokens.matchToToken(match);
+ yield {
+ type: getTokenType(token, match.index, text),
+ value: token.value
+ };
+ }
+ };
+}
+
+function highlightTokens(defs, text) {
+ let highlighted = "";
+
+ for (const {
+ type,
+ value
+ } of tokenize(text)) {
+ const colorize = defs[type];
+
+ if (colorize) {
+ highlighted += value.split(NEWLINE).map(str => colorize(str)).join("\n");
+ } else {
+ highlighted += value;
+ }
+ }
+
+ return highlighted;
+}
+
+function shouldHighlight(options) {
+ return !!Chalk.supportsColor || options.forceColor;
+}
+
+function getChalk(options) {
+ return options.forceColor ? new Chalk.constructor({
+ enabled: true,
+ level: 1
+ }) : Chalk;
+}
+
+function highlight(code, options = {}) {
+ if (shouldHighlight(options)) {
+ const chalk = getChalk(options);
+ const defs = getDefs(chalk);
+ return highlightTokens(defs, code);
+ } else {
+ return code;
+ }
+}
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