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// CodeMirror, copyright (c) by Marijn Haverbeke and others

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// Distributed under an MIT license: http://codemirror.net/LICENSE

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(function(mod) {

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if (typeof exports == "object" && typeof module == "object") // CommonJS

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mod(require("../../lib/codemirror"));

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else if (typeof define == "function" && define.amd) // AMD

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define(["../../lib/codemirror"], mod);

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else // Plain browser env

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mod(CodeMirror);

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})(function(CodeMirror) {

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"use strict";

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CodeMirror.defineMode("octave", function() {

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function wordRegexp(words) {

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return new RegExp("^((" + words.join(")|(") + "))\\b");

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}

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var singleOperators = new RegExp("^[\\+\\-\\*/&|\\^~<>!@'\\\\]");

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var singleDelimiters = new RegExp('^[\\(\\[\\{\\},:=;]');

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var doubleOperators = new RegExp("^((==)|(~=)|(<=)|(>=)|(<<)|(>>)|(\\.[\\+\\-\\*/\\^\\\\]))");

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var doubleDelimiters = new RegExp("^((!=)|(\\+=)|(\\-=)|(\\*=)|(/=)|(&=)|(\\|=)|(\\^=))");

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var tripleDelimiters = new RegExp("^((>>=)|(<<=))");

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var expressionEnd = new RegExp("^[\\]\\)]");

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var identifiers = new RegExp("^[_A-Za-z\xa1-\uffff][_A-Za-z0-9\xa1-\uffff]*");

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var builtins = wordRegexp([

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'error', 'eval', 'function', 'abs', 'acos', 'atan', 'asin', 'cos',

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'cosh', 'exp', 'log', 'prod', 'sum', 'log10', 'max', 'min', 'sign', 'sin', 'sinh',

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'sqrt', 'tan', 'reshape', 'break', 'zeros', 'default', 'margin', 'round', 'ones',

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'rand', 'syn', 'ceil', 'floor', 'size', 'clear', 'zeros', 'eye', 'mean', 'std', 'cov',

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'det', 'eig', 'inv', 'norm', 'rank', 'trace', 'expm', 'logm', 'sqrtm', 'linspace', 'plot',

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'title', 'xlabel', 'ylabel', 'legend', 'text', 'grid', 'meshgrid', 'mesh', 'num2str',

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'fft', 'ifft', 'arrayfun', 'cellfun', 'input', 'fliplr', 'flipud', 'ismember'

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]);

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var keywords = wordRegexp([

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'return', 'case', 'switch', 'else', 'elseif', 'end', 'endif', 'endfunction',

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'if', 'otherwise', 'do', 'for', 'while', 'try', 'catch', 'classdef', 'properties', 'events',

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'methods', 'global', 'persistent', 'endfor', 'endwhile', 'printf', 'sprintf', 'disp', 'until',

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'continue', 'pkg'

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]);

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// tokenizers

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function tokenTranspose(stream, state) {

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if (!stream.sol() && stream.peek() === '\'') {

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stream.next();

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state.tokenize = tokenBase;

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return 'operator';

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}

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state.tokenize = tokenBase;

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return tokenBase(stream, state);

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}

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function tokenComment(stream, state) {

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if (stream.match(/^.*%}/)) {

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state.tokenize = tokenBase;

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return 'comment';

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};

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stream.skipToEnd();

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return 'comment';

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}

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function tokenBase(stream, state) {

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// whitespaces

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if (stream.eatSpace()) return null;

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// Handle one line Comments

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if (stream.match('%{')){

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state.tokenize = tokenComment;

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stream.skipToEnd();

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return 'comment';

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}

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if (stream.match(/^[%#]/)){

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stream.skipToEnd();

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return 'comment';

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}

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// Handle Number Literals

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if (stream.match(/^[0-9\.+-]/, false)) {

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if (stream.match(/^[+-]?0x[0-9a-fA-F]+[ij]?/)) {

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stream.tokenize = tokenBase;

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return 'number'; };

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if (stream.match(/^[+-]?\d*\.\d+([EeDd][+-]?\d+)?[ij]?/)) { return 'number'; };

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if (stream.match(/^[+-]?\d+([EeDd][+-]?\d+)?[ij]?/)) { return 'number'; };

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}

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if (stream.match(wordRegexp(['nan','NaN','inf','Inf']))) { return 'number'; };

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// Handle Strings

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if (stream.match(/^"([^"]|(""))*"/)) { return 'string'; } ;

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if (stream.match(/^'([^']|(''))*'/)) { return 'string'; } ;

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// Handle words

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if (stream.match(keywords)) { return 'keyword'; } ;

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if (stream.match(builtins)) { return 'builtin'; } ;

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if (stream.match(identifiers)) { return 'variable'; } ;

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if (stream.match(singleOperators) || stream.match(doubleOperators)) { return 'operator'; };

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if (stream.match(singleDelimiters) || stream.match(doubleDelimiters) || stream.match(tripleDelimiters)) { return null; };

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if (stream.match(expressionEnd)) {

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state.tokenize = tokenTranspose;

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return null;

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};

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// Handle non-detected items

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stream.next();

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return 'error';

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};

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return {

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startState: function() {

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return {

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tokenize: tokenBase

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};

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token: function(stream, state) {

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var style = state.tokenize(stream, state);

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if (style === 'number' || style === 'variable'){

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state.tokenize = tokenTranspose;

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}

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return style;

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}

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};

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});

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CodeMirror.defineMIME("text/x-octave", "octave");

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});

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