text: // 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"));
    else if (typeof define == "function" && define.amd) // AMD
      define(["../../lib/codemirror"], mod);
    else // Plain browser env
      mod(CodeMirror);
  })(function(CodeMirror) {
  "use strict";
  
  CodeMirror.defineMode("octave", function() {
    function wordRegexp(words) {
      return new RegExp("^((" + words.join(")|(") + "))\\b");
    }
  
    var singleOperators = new RegExp("^[\\+\\-\\*/&|\\^~<>!@'\\\\]");
    var singleDelimiters = new RegExp('^[\\(\\[\\{\\},:=;\\.]');
    var doubleOperators = new RegExp("^((==)|(~=)|(<=)|(>=)|(<<)|(>>)|(\\.[\\+\\-\\*/\\^\\\\]))");
    var doubleDelimiters = new RegExp("^((!=)|(\\+=)|(\\-=)|(\\*=)|(/=)|(&=)|(\\|=)|(\\^=))");
    var tripleDelimiters = new RegExp("^((>>=)|(<<=))");
    var expressionEnd = new RegExp("^[\\]\\)]");
    var identifiers = new RegExp("^[_A-Za-z\xa1-\uffff][_A-Za-z0-9\xa1-\uffff]*");
  
    var builtins = wordRegexp([
      'error', 'eval', 'function', 'abs', 'acos', 'atan', 'asin', 'cos',
      'cosh', 'exp', 'log', 'prod', 'sum', 'log10', 'max', 'min', 'sign', 'sin', 'sinh',
      'sqrt', 'tan', 'reshape', 'break', 'zeros', 'default', 'margin', 'round', 'ones',
      'rand', 'syn', 'ceil', 'floor', 'size', 'clear', 'zeros', 'eye', 'mean', 'std', 'cov',
      'det', 'eig', 'inv', 'norm', 'rank', 'trace', 'expm', 'logm', 'sqrtm', 'linspace', 'plot',
      'title', 'xlabel', 'ylabel', 'legend', 'text', 'grid', 'meshgrid', 'mesh', 'num2str',
      'fft', 'ifft', 'arrayfun', 'cellfun', 'input', 'fliplr', 'flipud', 'ismember'
    ]);
  
    var keywords = wordRegexp([
      'return', 'case', 'switch', 'else', 'elseif', 'end', 'endif', 'endfunction',
      'if', 'otherwise', 'do', 'for', 'while', 'try', 'catch', 'classdef', 'properties', 'events',
      'methods', 'global', 'persistent', 'endfor', 'endwhile', 'printf', 'sprintf', 'disp', 'until',
      'continue', 'pkg'
    ]);
  
  
    // tokenizers
    function tokenTranspose(stream, state) {
      if (!stream.sol() && stream.peek() === '\'') {
        stream.next();
        state.tokenize = tokenBase;
        return 'operator';
      }
      state.tokenize = tokenBase;
      return tokenBase(stream, state);
    }
  
  
    function tokenComment(stream, state) {
      if (stream.match(/^.*%}/)) {
        state.tokenize = tokenBase;
        return 'comment';
      };
      stream.skipToEnd();
      return 'comment';
    }
  
    function tokenBase(stream, state) {
      // whitespaces
      if (stream.eatSpace()) return null;
  
      // Handle one line Comments
      if (stream.match('%{')){
        state.tokenize = tokenComment;
        stream.skipToEnd();
        return 'comment';
      }
  
      if (stream.match(/^[%#]/)){
        stream.skipToEnd();
        return 'comment';
      }
  
      // Handle Number Literals
      if (stream.match(/^[0-9\.+-]/, false)) {
        if (stream.match(/^[+-]?0x[0-9a-fA-F]+[ij]?/)) {
          stream.tokenize = tokenBase;
          return 'number'; };
        if (stream.match(/^[+-]?\d*\.\d+([EeDd][+-]?\d+)?[ij]?/)) { return 'number'; };
        if (stream.match(/^[+-]?\d+([EeDd][+-]?\d+)?[ij]?/)) { return 'number'; };
      }
      if (stream.match(wordRegexp(['nan','NaN','inf','Inf']))) { return 'number'; };
  
      // Handle Strings
      var m = stream.match(/^"(?:[^"]|"")*("|$)/) || stream.match(/^'(?:[^']|'')*('|$)/)
      if (m) { return m[1] ? 'string' : "string error"; }
  
      // Handle words
      if (stream.match(keywords)) { return 'keyword'; } ;
      if (stream.match(builtins)) { return 'builtin'; } ;
      if (stream.match(identifiers)) { return 'variable'; } ;
  
      if (stream.match(singleOperators) || stream.match(doubleOperators)) { return 'operator'; };
      if (stream.match(singleDelimiters) || stream.match(doubleDelimiters) || stream.match(tripleDelimiters)) { return null; };
  
      if (stream.match(expressionEnd)) {
        state.tokenize = tokenTranspose;
        return null;
      };
  
  
      // Handle non-detected items
      stream.next();
      return 'error';
    };
  
  
    return {
      startState: function() {
        return {
          tokenize: tokenBase
        };
      },
  
      token: function(stream, state) {
        var style = state.tokenize(stream, state);
        if (style === 'number' || style === 'variable'){
          state.tokenize = tokenTranspose;
        }
        return style;
      },
  
      lineComment: '%',
  
      fold: 'indent'
    };
  });
  
  CodeMirror.defineMIME("text/x-octave", "octave");
  
  });
  