268 lines
7.9 KiB
JavaScript
268 lines
7.9 KiB
JavaScript
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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("haskell", function(_config, modeConfig) {
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function switchState(source, setState, f) {
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setState(f);
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return f(source, setState);
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}
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// These should all be Unicode extended, as per the Haskell 2010 report
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var smallRE = /[a-z_]/;
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var largeRE = /[A-Z]/;
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var digitRE = /\d/;
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var hexitRE = /[0-9A-Fa-f]/;
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var octitRE = /[0-7]/;
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var idRE = /[a-z_A-Z0-9'\xa1-\uffff]/;
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var symbolRE = /[-!#$%&*+.\/<=>?@\\^|~:]/;
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var specialRE = /[(),;[\]`{}]/;
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var whiteCharRE = /[ \t\v\f]/; // newlines are handled in tokenizer
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function normal(source, setState) {
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if (source.eatWhile(whiteCharRE)) {
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return null;
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}
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var ch = source.next();
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if (specialRE.test(ch)) {
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if (ch == '{' && source.eat('-')) {
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var t = "comment";
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if (source.eat('#')) {
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t = "meta";
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}
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return switchState(source, setState, ncomment(t, 1));
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}
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return null;
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}
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if (ch == '\'') {
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if (source.eat('\\')) {
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source.next(); // should handle other escapes here
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}
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else {
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source.next();
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}
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if (source.eat('\'')) {
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return "string";
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}
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return "error";
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}
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if (ch == '"') {
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return switchState(source, setState, stringLiteral);
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}
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if (largeRE.test(ch)) {
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source.eatWhile(idRE);
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if (source.eat('.')) {
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return "qualifier";
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}
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return "variable-2";
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}
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if (smallRE.test(ch)) {
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source.eatWhile(idRE);
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return "variable";
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}
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if (digitRE.test(ch)) {
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if (ch == '0') {
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if (source.eat(/[xX]/)) {
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source.eatWhile(hexitRE); // should require at least 1
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return "integer";
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}
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if (source.eat(/[oO]/)) {
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source.eatWhile(octitRE); // should require at least 1
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return "number";
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}
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}
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source.eatWhile(digitRE);
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var t = "number";
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if (source.match(/^\.\d+/)) {
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t = "number";
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}
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if (source.eat(/[eE]/)) {
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t = "number";
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source.eat(/[-+]/);
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source.eatWhile(digitRE); // should require at least 1
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}
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return t;
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}
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if (ch == "." && source.eat("."))
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return "keyword";
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if (symbolRE.test(ch)) {
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if (ch == '-' && source.eat(/-/)) {
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source.eatWhile(/-/);
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if (!source.eat(symbolRE)) {
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source.skipToEnd();
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return "comment";
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}
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}
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var t = "variable";
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if (ch == ':') {
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t = "variable-2";
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}
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source.eatWhile(symbolRE);
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return t;
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}
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return "error";
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}
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function ncomment(type, nest) {
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if (nest == 0) {
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return normal;
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}
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return function(source, setState) {
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var currNest = nest;
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while (!source.eol()) {
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var ch = source.next();
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if (ch == '{' && source.eat('-')) {
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++currNest;
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}
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else if (ch == '-' && source.eat('}')) {
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--currNest;
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if (currNest == 0) {
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setState(normal);
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return type;
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}
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}
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}
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setState(ncomment(type, currNest));
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return type;
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};
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}
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function stringLiteral(source, setState) {
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while (!source.eol()) {
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var ch = source.next();
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if (ch == '"') {
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setState(normal);
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return "string";
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}
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if (ch == '\\') {
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if (source.eol() || source.eat(whiteCharRE)) {
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setState(stringGap);
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return "string";
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}
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if (source.eat('&')) {
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}
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else {
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source.next(); // should handle other escapes here
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}
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}
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}
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setState(normal);
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return "error";
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}
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function stringGap(source, setState) {
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if (source.eat('\\')) {
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return switchState(source, setState, stringLiteral);
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}
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source.next();
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setState(normal);
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return "error";
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}
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var wellKnownWords = (function() {
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var wkw = {};
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function setType(t) {
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return function () {
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for (var i = 0; i < arguments.length; i++)
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wkw[arguments[i]] = t;
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};
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}
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setType("keyword")(
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"case", "class", "data", "default", "deriving", "do", "else", "foreign",
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"if", "import", "in", "infix", "infixl", "infixr", "instance", "let",
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"module", "newtype", "of", "then", "type", "where", "_");
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setType("keyword")(
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"\.\.", ":", "::", "=", "\\", "\"", "<-", "->", "@", "~", "=>");
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setType("builtin")(
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"!!", "$!", "$", "&&", "+", "++", "-", ".", "/", "/=", "<", "<=", "=<<",
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"==", ">", ">=", ">>", ">>=", "^", "^^", "||", "*", "**");
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setType("builtin")(
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"Bool", "Bounded", "Char", "Double", "EQ", "Either", "Enum", "Eq",
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"False", "FilePath", "Float", "Floating", "Fractional", "Functor", "GT",
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"IO", "IOError", "Int", "Integer", "Integral", "Just", "LT", "Left",
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"Maybe", "Monad", "Nothing", "Num", "Ord", "Ordering", "Rational", "Read",
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"ReadS", "Real", "RealFloat", "RealFrac", "Right", "Show", "ShowS",
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"String", "True");
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setType("builtin")(
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"abs", "acos", "acosh", "all", "and", "any", "appendFile", "asTypeOf",
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"asin", "asinh", "atan", "atan2", "atanh", "break", "catch", "ceiling",
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"compare", "concat", "concatMap", "const", "cos", "cosh", "curry",
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"cycle", "decodeFloat", "div", "divMod", "drop", "dropWhile", "either",
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"elem", "encodeFloat", "enumFrom", "enumFromThen", "enumFromThenTo",
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"enumFromTo", "error", "even", "exp", "exponent", "fail", "filter",
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"flip", "floatDigits", "floatRadix", "floatRange", "floor", "fmap",
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"foldl", "foldl1", "foldr", "foldr1", "fromEnum", "fromInteger",
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"fromIntegral", "fromRational", "fst", "gcd", "getChar", "getContents",
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"getLine", "head", "id", "init", "interact", "ioError", "isDenormalized",
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"isIEEE", "isInfinite", "isNaN", "isNegativeZero", "iterate", "last",
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"lcm", "length", "lex", "lines", "log", "logBase", "lookup", "map",
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"mapM", "mapM_", "max", "maxBound", "maximum", "maybe", "min", "minBound",
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"minimum", "mod", "negate", "not", "notElem", "null", "odd", "or",
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"otherwise", "pi", "pred", "print", "product", "properFraction",
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"putChar", "putStr", "putStrLn", "quot", "quotRem", "read", "readFile",
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"readIO", "readList", "readLn", "readParen", "reads", "readsPrec",
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"realToFrac", "recip", "rem", "repeat", "replicate", "return", "reverse",
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"round", "scaleFloat", "scanl", "scanl1", "scanr", "scanr1", "seq",
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"sequence", "sequence_", "show", "showChar", "showList", "showParen",
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"showString", "shows", "showsPrec", "significand", "signum", "sin",
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"sinh", "snd", "span", "splitAt", "sqrt", "subtract", "succ", "sum",
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"tail", "take", "takeWhile", "tan", "tanh", "toEnum", "toInteger",
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"toRational", "truncate", "uncurry", "undefined", "unlines", "until",
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"unwords", "unzip", "unzip3", "userError", "words", "writeFile", "zip",
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"zip3", "zipWith", "zipWith3");
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var override = modeConfig.overrideKeywords;
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if (override) for (var word in override) if (override.hasOwnProperty(word))
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wkw[word] = override[word];
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return wkw;
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})();
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return {
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startState: function () { return { f: normal }; },
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copyState: function (s) { return { f: s.f }; },
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token: function(stream, state) {
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var t = state.f(stream, function(s) { state.f = s; });
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var w = stream.current();
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return wellKnownWords.hasOwnProperty(w) ? wellKnownWords[w] : t;
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},
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blockCommentStart: "{-",
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blockCommentEnd: "-}",
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lineComment: "--"
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};
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});
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CodeMirror.defineMIME("text/x-haskell", "haskell");
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});
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