Function identifier

static/editor.md/lib/codemirror/mode/pegjs/pegjs.js:17–19

(stream)

  var jsMode = CodeMirror.getMode(config, "javascript");

  function identifier(stream) {
    return stream.match(/^[a-zA-Z_][a-zA-Z0-9_]*/);
  }

  return {
    startState: function () {