Function marked

test/fixtures/snapshot/marked.js:2578–2680

* Marked

(src, opt, callback)

   */

  function marked(src, opt, callback) {
    // throw error in case of non string input
    if (typeof src === 'undefined' || src === null) {
      throw new Error('marked(): input parameter is undefined or null');
    }

    if (typeof src !== 'string') {
      throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
    }

    if (typeof opt === 'function') {
      callback = opt;
      opt = null;
    }

    opt = merge({}, marked.defaults, opt || {});
    checkSanitizeDeprecation(opt);

    if (callback) {
      var highlight = opt.highlight;
      var tokens;

      try {
        tokens = Lexer.lex(src, opt);
      } catch (e) {
        return callback(e);
      }

      var done = function done(err) {
        var out;

        if (!err) {
          try {
            if (opt.walkTokens) {
              marked.walkTokens(tokens, opt.walkTokens);
            }

            out = Parser.parse(tokens, opt);
          } catch (e) {
            err = e;
          }
        }

        opt.highlight = highlight;
        return err ? callback(err) : callback(null, out);
      };

      if (!highlight || highlight.length < 3) {
        return done();
      }

      delete opt.highlight;
      if (!tokens.length) return done();
      var pending = 0;
      marked.walkTokens(tokens, function (token) {
        if (token.type === 'code') {
          pending++;
          setTimeout(function () {