Incs/codemirror/mode/pegjs/pegjs.js

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// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"), require("../javascript/javascript"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror", "../javascript/javascript"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.defineMode("pegjs", function (config) {
  var jsMode = CodeMirror.getMode(config, "javascript");

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

  return {
    startState: function () {
      return {
        inString: false,
        stringType: null,
        inComment: false,
        inCharacterClass: false,
        braced: 0,
        lhs: true,
        localState: null
      };
    },
    token: function (stream, state) {
      if (stream)

      //check for state changes
      if (!state.inString && !state.inComment && ((stream.peek() == '"') || (stream.peek() == "'"))) {
        state.stringType = stream.peek();
        stream.next(); // Skip quote
        state.inString = true; // Update state
      }
      if (!state.inString && !state.inComment && stream.match(/^\/\*/)) {
        state.inComment = true;
      }

      //return state
      if (state.inString) {
        while (state.inString && !stream.eol()) {
          if (stream.peek() === state.stringType) {
            stream.next(); // Skip quote
            state.inString = false; // Clear flag
          } else if (stream.peek() === '\\') {
            stream.next();
            stream.next();
          } else {
            stream.match(/^.[^\\\"\']*/);
          }
        }
        return state.lhs ? "property string" : "string"; // Token style
      } else if (state.inComment) {