scripts/CodeMirror/mode/javascript/javascript.js (view raw)
1// CodeMirror, copyright (c) by Marijn Haverbeke and others
2// Distributed under an MIT license: https://codemirror.net/LICENSE
3
4(function(mod) {
5 if (typeof exports == "object" && typeof module == "object") // CommonJS
6 mod(require("../../lib/codemirror"));
7 else if (typeof define == "function" && define.amd) // AMD
8 define(["../../lib/codemirror"], mod);
9 else // Plain browser env
10 mod(CodeMirror);
11})(function(CodeMirror) {
12"use strict";
13
14CodeMirror.defineMode("javascript", function(config, parserConfig) {
15 var indentUnit = config.indentUnit;
16 var statementIndent = parserConfig.statementIndent;
17 var jsonldMode = parserConfig.jsonld;
18 var jsonMode = parserConfig.json || jsonldMode;
19 var isTS = parserConfig.typescript;
20 var wordRE = parserConfig.wordCharacters || /[\w$\xa1-\uffff]/;
21
22 // Tokenizer
23
24 var keywords = function(){
25 function kw(type) {return {type: type, style: "keyword"};}
26 var A = kw("keyword a"), B = kw("keyword b"), C = kw("keyword c"), D = kw("keyword d");
27 var operator = kw("operator"), atom = {type: "atom", style: "atom"};
28
29 return {
30 "if": kw("if"), "while": A, "with": A, "else": B, "do": B, "try": B, "finally": B,
31 "return": D, "break": D, "continue": D, "new": kw("new"), "delete": C, "void": C, "throw": C,
32 "debugger": kw("debugger"), "var": kw("var"), "const": kw("var"), "let": kw("var"),
33 "function": kw("function"), "catch": kw("catch"),
34 "for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"),
35 "in": operator, "typeof": operator, "instanceof": operator,
36 "true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom,
37 "this": kw("this"), "class": kw("class"), "super": kw("atom"),
38 "yield": C, "export": kw("export"), "import": kw("import"), "extends": C,
39 "await": C
40 };
41 }();
42
43 var isOperatorChar = /[+\-*&%=<>!?|~^@]/;
44 var isJsonldKeyword = /^@(context|id|value|language|type|container|list|set|reverse|index|base|vocab|graph)"/;
45
46 function readRegexp(stream) {
47 var escaped = false, next, inSet = false;
48 while ((next = stream.next()) != null) {
49 if (!escaped) {
50 if (next == "/" && !inSet) return;
51 if (next == "[") inSet = true;
52 else if (inSet && next == "]") inSet = false;
53 }
54 escaped = !escaped && next == "\\";
55 }
56 }
57
58 // Used as scratch variables to communicate multiple values without
59 // consing up tons of objects.
60 var type, content;
61 function ret(tp, style, cont) {
62 type = tp; content = cont;
63 return style;
64 }
65 function tokenBase(stream, state) {
66 var ch = stream.next();
67 if (ch == '"' || ch == "'") {
68 state.tokenize = tokenString(ch);
69 return state.tokenize(stream, state);
70 } else if (ch == "." && stream.match(/^\d[\d_]*(?:[eE][+\-]?[\d_]+)?/)) {
71 return ret("number", "number");
72 } else if (ch == "." && stream.match("..")) {
73 return ret("spread", "meta");
74 } else if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
75 return ret(ch);
76 } else if (ch == "=" && stream.eat(">")) {
77 return ret("=>", "operator");
78 } else if (ch == "0" && stream.match(/^(?:x[\dA-Fa-f_]+|o[0-7_]+|b[01_]+)n?/)) {
79 return ret("number", "number");
80 } else if (/\d/.test(ch)) {
81 stream.match(/^[\d_]*(?:n|(?:\.[\d_]*)?(?:[eE][+\-]?[\d_]+)?)?/);
82 return ret("number", "number");
83 } else if (ch == "/") {
84 if (stream.eat("*")) {
85 state.tokenize = tokenComment;
86 return tokenComment(stream, state);
87 } else if (stream.eat("/")) {
88 stream.skipToEnd();
89 return ret("comment", "comment");
90 } else if (expressionAllowed(stream, state, 1)) {
91 readRegexp(stream);
92 stream.match(/^\b(([gimyus])(?![gimyus]*\2))+\b/);
93 return ret("regexp", "string-2");
94 } else {
95 stream.eat("=");
96 return ret("operator", "operator", stream.current());
97 }
98 } else if (ch == "`") {
99 state.tokenize = tokenQuasi;
100 return tokenQuasi(stream, state);
101 } else if (ch == "#" && stream.peek() == "!") {
102 stream.skipToEnd();
103 return ret("meta", "meta");
104 } else if (ch == "#" && stream.eatWhile(wordRE)) {
105 return ret("variable", "property")
106 } else if (ch == "<" && stream.match("!--") ||
107 (ch == "-" && stream.match("->") && !/\S/.test(stream.string.slice(0, stream.start)))) {
108 stream.skipToEnd()
109 return ret("comment", "comment")
110 } else if (isOperatorChar.test(ch)) {
111 if (ch != ">" || !state.lexical || state.lexical.type != ">") {
112 if (stream.eat("=")) {
113 if (ch == "!" || ch == "=") stream.eat("=")
114 } else if (/[<>*+\-|&?]/.test(ch)) {
115 stream.eat(ch)
116 if (ch == ">") stream.eat(ch)
117 }
118 }
119 if (ch == "?" && stream.eat(".")) return ret(".")
120 return ret("operator", "operator", stream.current());
121 } else if (wordRE.test(ch)) {
122 stream.eatWhile(wordRE);
123 var word = stream.current()
124 if (state.lastType != ".") {
125 if (keywords.propertyIsEnumerable(word)) {
126 var kw = keywords[word]
127 return ret(kw.type, kw.style, word)
128 }
129 if (word == "async" && stream.match(/^(\s|\/\*.*?\*\/)*[\[\(\w]/, false))
130 return ret("async", "keyword", word)
131 }
132 return ret("variable", "variable", word)
133 }
134 }
135
136 function tokenString(quote) {
137 return function(stream, state) {
138 var escaped = false, next;
139 if (jsonldMode && stream.peek() == "@" && stream.match(isJsonldKeyword)){
140 state.tokenize = tokenBase;
141 return ret("jsonld-keyword", "meta");
142 }
143 while ((next = stream.next()) != null) {
144 if (next == quote && !escaped) break;
145 escaped = !escaped && next == "\\";
146 }
147 if (!escaped) state.tokenize = tokenBase;
148 return ret("string", "string");
149 };
150 }
151
152 function tokenComment(stream, state) {
153 var maybeEnd = false, ch;
154 while (ch = stream.next()) {
155 if (ch == "/" && maybeEnd) {
156 state.tokenize = tokenBase;
157 break;
158 }
159 maybeEnd = (ch == "*");
160 }
161 return ret("comment", "comment");
162 }
163
164 function tokenQuasi(stream, state) {
165 var escaped = false, next;
166 while ((next = stream.next()) != null) {
167 if (!escaped && (next == "`" || next == "$" && stream.eat("{"))) {
168 state.tokenize = tokenBase;
169 break;
170 }
171 escaped = !escaped && next == "\\";
172 }
173 return ret("quasi", "string-2", stream.current());
174 }
175
176 var brackets = "([{}])";
177 // This is a crude lookahead trick to try and notice that we're
178 // parsing the argument patterns for a fat-arrow function before we
179 // actually hit the arrow token. It only works if the arrow is on
180 // the same line as the arguments and there's no strange noise
181 // (comments) in between. Fallback is to only notice when we hit the
182 // arrow, and not declare the arguments as locals for the arrow
183 // body.
184 function findFatArrow(stream, state) {
185 if (state.fatArrowAt) state.fatArrowAt = null;
186 var arrow = stream.string.indexOf("=>", stream.start);
187 if (arrow < 0) return;
188
189 if (isTS) { // Try to skip TypeScript return type declarations after the arguments
190 var m = /:\s*(?:\w+(?:<[^>]*>|\[\])?|\{[^}]*\})\s*$/.exec(stream.string.slice(stream.start, arrow))
191 if (m) arrow = m.index
192 }
193
194 var depth = 0, sawSomething = false;
195 for (var pos = arrow - 1; pos >= 0; --pos) {
196 var ch = stream.string.charAt(pos);
197 var bracket = brackets.indexOf(ch);
198 if (bracket >= 0 && bracket < 3) {
199 if (!depth) { ++pos; break; }
200 if (--depth == 0) { if (ch == "(") sawSomething = true; break; }
201 } else if (bracket >= 3 && bracket < 6) {
202 ++depth;
203 } else if (wordRE.test(ch)) {
204 sawSomething = true;
205 } else if (/["'\/`]/.test(ch)) {
206 for (;; --pos) {
207 if (pos == 0) return
208 var next = stream.string.charAt(pos - 1)
209 if (next == ch && stream.string.charAt(pos - 2) != "\\") { pos--; break }
210 }
211 } else if (sawSomething && !depth) {
212 ++pos;
213 break;
214 }
215 }
216 if (sawSomething && !depth) state.fatArrowAt = pos;
217 }
218
219 // Parser
220
221 var atomicTypes = {"atom": true, "number": true, "variable": true, "string": true, "regexp": true, "this": true, "jsonld-keyword": true};
222
223 function JSLexical(indented, column, type, align, prev, info) {
224 this.indented = indented;
225 this.column = column;
226 this.type = type;
227 this.prev = prev;
228 this.info = info;
229 if (align != null) this.align = align;
230 }
231
232 function inScope(state, varname) {
233 for (var v = state.localVars; v; v = v.next)
234 if (v.name == varname) return true;
235 for (var cx = state.context; cx; cx = cx.prev) {
236 for (var v = cx.vars; v; v = v.next)
237 if (v.name == varname) return true;
238 }
239 }
240
241 function parseJS(state, style, type, content, stream) {
242 var cc = state.cc;
243 // Communicate our context to the combinators.
244 // (Less wasteful than consing up a hundred closures on every call.)
245 cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc; cx.style = style;
246
247 if (!state.lexical.hasOwnProperty("align"))
248 state.lexical.align = true;
249
250 while(true) {
251 var combinator = cc.length ? cc.pop() : jsonMode ? expression : statement;
252 if (combinator(type, content)) {
253 while(cc.length && cc[cc.length - 1].lex)
254 cc.pop()();
255 if (cx.marked) return cx.marked;
256 if (type == "variable" && inScope(state, content)) return "variable-2";
257 return style;
258 }
259 }
260 }
261
262 // Combinator utils
263
264 var cx = {state: null, column: null, marked: null, cc: null};
265 function pass() {
266 for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]);
267 }
268 function cont() {
269 pass.apply(null, arguments);
270 return true;
271 }
272 function inList(name, list) {
273 for (var v = list; v; v = v.next) if (v.name == name) return true
274 return false;
275 }
276 function register(varname) {
277 var state = cx.state;
278 cx.marked = "def";
279 if (state.context) {
280 if (state.lexical.info == "var" && state.context && state.context.block) {
281 // FIXME function decls are also not block scoped
282 var newContext = registerVarScoped(varname, state.context)
283 if (newContext != null) {
284 state.context = newContext
285 return
286 }
287 } else if (!inList(varname, state.localVars)) {
288 state.localVars = new Var(varname, state.localVars)
289 return
290 }
291 }
292 // Fall through means this is global
293 if (parserConfig.globalVars && !inList(varname, state.globalVars))
294 state.globalVars = new Var(varname, state.globalVars)
295 }
296 function registerVarScoped(varname, context) {
297 if (!context) {
298 return null
299 } else if (context.block) {
300 var inner = registerVarScoped(varname, context.prev)
301 if (!inner) return null
302 if (inner == context.prev) return context
303 return new Context(inner, context.vars, true)
304 } else if (inList(varname, context.vars)) {
305 return context
306 } else {
307 return new Context(context.prev, new Var(varname, context.vars), false)
308 }
309 }
310
311 function isModifier(name) {
312 return name == "public" || name == "private" || name == "protected" || name == "abstract" || name == "readonly"
313 }
314
315 // Combinators
316
317 function Context(prev, vars, block) { this.prev = prev; this.vars = vars; this.block = block }
318 function Var(name, next) { this.name = name; this.next = next }
319
320 var defaultVars = new Var("this", new Var("arguments", null))
321 function pushcontext() {
322 cx.state.context = new Context(cx.state.context, cx.state.localVars, false)
323 cx.state.localVars = defaultVars
324 }
325 function pushblockcontext() {
326 cx.state.context = new Context(cx.state.context, cx.state.localVars, true)
327 cx.state.localVars = null
328 }
329 function popcontext() {
330 cx.state.localVars = cx.state.context.vars
331 cx.state.context = cx.state.context.prev
332 }
333 popcontext.lex = true
334 function pushlex(type, info) {
335 var result = function() {
336 var state = cx.state, indent = state.indented;
337 if (state.lexical.type == "stat") indent = state.lexical.indented;
338 else for (var outer = state.lexical; outer && outer.type == ")" && outer.align; outer = outer.prev)
339 indent = outer.indented;
340 state.lexical = new JSLexical(indent, cx.stream.column(), type, null, state.lexical, info);
341 };
342 result.lex = true;
343 return result;
344 }
345 function poplex() {
346 var state = cx.state;
347 if (state.lexical.prev) {
348 if (state.lexical.type == ")")
349 state.indented = state.lexical.indented;
350 state.lexical = state.lexical.prev;
351 }
352 }
353 poplex.lex = true;
354
355 function expect(wanted) {
356 function exp(type) {
357 if (type == wanted) return cont();
358 else if (wanted == ";" || type == "}" || type == ")" || type == "]") return pass();
359 else return cont(exp);
360 };
361 return exp;
362 }
363
364 function statement(type, value) {
365 if (type == "var") return cont(pushlex("vardef", value), vardef, expect(";"), poplex);
366 if (type == "keyword a") return cont(pushlex("form"), parenExpr, statement, poplex);
367 if (type == "keyword b") return cont(pushlex("form"), statement, poplex);
368 if (type == "keyword d") return cx.stream.match(/^\s*$/, false) ? cont() : cont(pushlex("stat"), maybeexpression, expect(";"), poplex);
369 if (type == "debugger") return cont(expect(";"));
370 if (type == "{") return cont(pushlex("}"), pushblockcontext, block, poplex, popcontext);
371 if (type == ";") return cont();
372 if (type == "if") {
373 if (cx.state.lexical.info == "else" && cx.state.cc[cx.state.cc.length - 1] == poplex)
374 cx.state.cc.pop()();
375 return cont(pushlex("form"), parenExpr, statement, poplex, maybeelse);
376 }
377 if (type == "function") return cont(functiondef);
378 if (type == "for") return cont(pushlex("form"), forspec, statement, poplex);
379 if (type == "class" || (isTS && value == "interface")) {
380 cx.marked = "keyword"
381 return cont(pushlex("form", type == "class" ? type : value), className, poplex)
382 }
383 if (type == "variable") {
384 if (isTS && value == "declare") {
385 cx.marked = "keyword"
386 return cont(statement)
387 } else if (isTS && (value == "module" || value == "enum" || value == "type") && cx.stream.match(/^\s*\w/, false)) {
388 cx.marked = "keyword"
389 if (value == "enum") return cont(enumdef);
390 else if (value == "type") return cont(typename, expect("operator"), typeexpr, expect(";"));
391 else return cont(pushlex("form"), pattern, expect("{"), pushlex("}"), block, poplex, poplex)
392 } else if (isTS && value == "namespace") {
393 cx.marked = "keyword"
394 return cont(pushlex("form"), expression, statement, poplex)
395 } else if (isTS && value == "abstract") {
396 cx.marked = "keyword"
397 return cont(statement)
398 } else {
399 return cont(pushlex("stat"), maybelabel);
400 }
401 }
402 if (type == "switch") return cont(pushlex("form"), parenExpr, expect("{"), pushlex("}", "switch"), pushblockcontext,
403 block, poplex, poplex, popcontext);
404 if (type == "case") return cont(expression, expect(":"));
405 if (type == "default") return cont(expect(":"));
406 if (type == "catch") return cont(pushlex("form"), pushcontext, maybeCatchBinding, statement, poplex, popcontext);
407 if (type == "export") return cont(pushlex("stat"), afterExport, poplex);
408 if (type == "import") return cont(pushlex("stat"), afterImport, poplex);
409 if (type == "async") return cont(statement)
410 if (value == "@") return cont(expression, statement)
411 return pass(pushlex("stat"), expression, expect(";"), poplex);
412 }
413 function maybeCatchBinding(type) {
414 if (type == "(") return cont(funarg, expect(")"))
415 }
416 function expression(type, value) {
417 return expressionInner(type, value, false);
418 }
419 function expressionNoComma(type, value) {
420 return expressionInner(type, value, true);
421 }
422 function parenExpr(type) {
423 if (type != "(") return pass()
424 return cont(pushlex(")"), maybeexpression, expect(")"), poplex)
425 }
426 function expressionInner(type, value, noComma) {
427 if (cx.state.fatArrowAt == cx.stream.start) {
428 var body = noComma ? arrowBodyNoComma : arrowBody;
429 if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, expect("=>"), body, popcontext);
430 else if (type == "variable") return pass(pushcontext, pattern, expect("=>"), body, popcontext);
431 }
432
433 var maybeop = noComma ? maybeoperatorNoComma : maybeoperatorComma;
434 if (atomicTypes.hasOwnProperty(type)) return cont(maybeop);
435 if (type == "function") return cont(functiondef, maybeop);
436 if (type == "class" || (isTS && value == "interface")) { cx.marked = "keyword"; return cont(pushlex("form"), classExpression, poplex); }
437 if (type == "keyword c" || type == "async") return cont(noComma ? expressionNoComma : expression);
438 if (type == "(") return cont(pushlex(")"), maybeexpression, expect(")"), poplex, maybeop);
439 if (type == "operator" || type == "spread") return cont(noComma ? expressionNoComma : expression);
440 if (type == "[") return cont(pushlex("]"), arrayLiteral, poplex, maybeop);
441 if (type == "{") return contCommasep(objprop, "}", null, maybeop);
442 if (type == "quasi") return pass(quasi, maybeop);
443 if (type == "new") return cont(maybeTarget(noComma));
444 if (type == "import") return cont(expression);
445 return cont();
446 }
447 function maybeexpression(type) {
448 if (type.match(/[;\}\)\],]/)) return pass();
449 return pass(expression);
450 }
451
452 function maybeoperatorComma(type, value) {
453 if (type == ",") return cont(maybeexpression);
454 return maybeoperatorNoComma(type, value, false);
455 }
456 function maybeoperatorNoComma(type, value, noComma) {
457 var me = noComma == false ? maybeoperatorComma : maybeoperatorNoComma;
458 var expr = noComma == false ? expression : expressionNoComma;
459 if (type == "=>") return cont(pushcontext, noComma ? arrowBodyNoComma : arrowBody, popcontext);
460 if (type == "operator") {
461 if (/\+\+|--/.test(value) || isTS && value == "!") return cont(me);
462 if (isTS && value == "<" && cx.stream.match(/^([^<>]|<[^<>]*>)*>\s*\(/, false))
463 return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, me);
464 if (value == "?") return cont(expression, expect(":"), expr);
465 return cont(expr);
466 }
467 if (type == "quasi") { return pass(quasi, me); }
468 if (type == ";") return;
469 if (type == "(") return contCommasep(expressionNoComma, ")", "call", me);
470 if (type == ".") return cont(property, me);
471 if (type == "[") return cont(pushlex("]"), maybeexpression, expect("]"), poplex, me);
472 if (isTS && value == "as") { cx.marked = "keyword"; return cont(typeexpr, me) }
473 if (type == "regexp") {
474 cx.state.lastType = cx.marked = "operator"
475 cx.stream.backUp(cx.stream.pos - cx.stream.start - 1)
476 return cont(expr)
477 }
478 }
479 function quasi(type, value) {
480 if (type != "quasi") return pass();
481 if (value.slice(value.length - 2) != "${") return cont(quasi);
482 return cont(expression, continueQuasi);
483 }
484 function continueQuasi(type) {
485 if (type == "}") {
486 cx.marked = "string-2";
487 cx.state.tokenize = tokenQuasi;
488 return cont(quasi);
489 }
490 }
491 function arrowBody(type) {
492 findFatArrow(cx.stream, cx.state);
493 return pass(type == "{" ? statement : expression);
494 }
495 function arrowBodyNoComma(type) {
496 findFatArrow(cx.stream, cx.state);
497 return pass(type == "{" ? statement : expressionNoComma);
498 }
499 function maybeTarget(noComma) {
500 return function(type) {
501 if (type == ".") return cont(noComma ? targetNoComma : target);
502 else if (type == "variable" && isTS) return cont(maybeTypeArgs, noComma ? maybeoperatorNoComma : maybeoperatorComma)
503 else return pass(noComma ? expressionNoComma : expression);
504 };
505 }
506 function target(_, value) {
507 if (value == "target") { cx.marked = "keyword"; return cont(maybeoperatorComma); }
508 }
509 function targetNoComma(_, value) {
510 if (value == "target") { cx.marked = "keyword"; return cont(maybeoperatorNoComma); }
511 }
512 function maybelabel(type) {
513 if (type == ":") return cont(poplex, statement);
514 return pass(maybeoperatorComma, expect(";"), poplex);
515 }
516 function property(type) {
517 if (type == "variable") {cx.marked = "property"; return cont();}
518 }
519 function objprop(type, value) {
520 if (type == "async") {
521 cx.marked = "property";
522 return cont(objprop);
523 } else if (type == "variable" || cx.style == "keyword") {
524 cx.marked = "property";
525 if (value == "get" || value == "set") return cont(getterSetter);
526 var m // Work around fat-arrow-detection complication for detecting typescript typed arrow params
527 if (isTS && cx.state.fatArrowAt == cx.stream.start && (m = cx.stream.match(/^\s*:\s*/, false)))
528 cx.state.fatArrowAt = cx.stream.pos + m[0].length
529 return cont(afterprop);
530 } else if (type == "number" || type == "string") {
531 cx.marked = jsonldMode ? "property" : (cx.style + " property");
532 return cont(afterprop);
533 } else if (type == "jsonld-keyword") {
534 return cont(afterprop);
535 } else if (isTS && isModifier(value)) {
536 cx.marked = "keyword"
537 return cont(objprop)
538 } else if (type == "[") {
539 return cont(expression, maybetype, expect("]"), afterprop);
540 } else if (type == "spread") {
541 return cont(expressionNoComma, afterprop);
542 } else if (value == "*") {
543 cx.marked = "keyword";
544 return cont(objprop);
545 } else if (type == ":") {
546 return pass(afterprop)
547 }
548 }
549 function getterSetter(type) {
550 if (type != "variable") return pass(afterprop);
551 cx.marked = "property";
552 return cont(functiondef);
553 }
554 function afterprop(type) {
555 if (type == ":") return cont(expressionNoComma);
556 if (type == "(") return pass(functiondef);
557 }
558 function commasep(what, end, sep) {
559 function proceed(type, value) {
560 if (sep ? sep.indexOf(type) > -1 : type == ",") {
561 var lex = cx.state.lexical;
562 if (lex.info == "call") lex.pos = (lex.pos || 0) + 1;
563 return cont(function(type, value) {
564 if (type == end || value == end) return pass()
565 return pass(what)
566 }, proceed);
567 }
568 if (type == end || value == end) return cont();
569 if (sep && sep.indexOf(";") > -1) return pass(what)
570 return cont(expect(end));
571 }
572 return function(type, value) {
573 if (type == end || value == end) return cont();
574 return pass(what, proceed);
575 };
576 }
577 function contCommasep(what, end, info) {
578 for (var i = 3; i < arguments.length; i++)
579 cx.cc.push(arguments[i]);
580 return cont(pushlex(end, info), commasep(what, end), poplex);
581 }
582 function block(type) {
583 if (type == "}") return cont();
584 return pass(statement, block);
585 }
586 function maybetype(type, value) {
587 if (isTS) {
588 if (type == ":") return cont(typeexpr);
589 if (value == "?") return cont(maybetype);
590 }
591 }
592 function maybetypeOrIn(type, value) {
593 if (isTS && (type == ":" || value == "in")) return cont(typeexpr)
594 }
595 function mayberettype(type) {
596 if (isTS && type == ":") {
597 if (cx.stream.match(/^\s*\w+\s+is\b/, false)) return cont(expression, isKW, typeexpr)
598 else return cont(typeexpr)
599 }
600 }
601 function isKW(_, value) {
602 if (value == "is") {
603 cx.marked = "keyword"
604 return cont()
605 }
606 }
607 function typeexpr(type, value) {
608 if (value == "keyof" || value == "typeof" || value == "infer") {
609 cx.marked = "keyword"
610 return cont(value == "typeof" ? expressionNoComma : typeexpr)
611 }
612 if (type == "variable" || value == "void") {
613 cx.marked = "type"
614 return cont(afterType)
615 }
616 if (value == "|" || value == "&") return cont(typeexpr)
617 if (type == "string" || type == "number" || type == "atom") return cont(afterType);
618 if (type == "[") return cont(pushlex("]"), commasep(typeexpr, "]", ","), poplex, afterType)
619 if (type == "{") return cont(pushlex("}"), commasep(typeprop, "}", ",;"), poplex, afterType)
620 if (type == "(") return cont(commasep(typearg, ")"), maybeReturnType, afterType)
621 if (type == "<") return cont(commasep(typeexpr, ">"), typeexpr)
622 }
623 function maybeReturnType(type) {
624 if (type == "=>") return cont(typeexpr)
625 }
626 function typeprop(type, value) {
627 if (type == "variable" || cx.style == "keyword") {
628 cx.marked = "property"
629 return cont(typeprop)
630 } else if (value == "?" || type == "number" || type == "string") {
631 return cont(typeprop)
632 } else if (type == ":") {
633 return cont(typeexpr)
634 } else if (type == "[") {
635 return cont(expect("variable"), maybetypeOrIn, expect("]"), typeprop)
636 } else if (type == "(") {
637 return pass(functiondecl, typeprop)
638 }
639 }
640 function typearg(type, value) {
641 if (type == "variable" && cx.stream.match(/^\s*[?:]/, false) || value == "?") return cont(typearg)
642 if (type == ":") return cont(typeexpr)
643 if (type == "spread") return cont(typearg)
644 return pass(typeexpr)
645 }
646 function afterType(type, value) {
647 if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
648 if (value == "|" || type == "." || value == "&") return cont(typeexpr)
649 if (type == "[") return cont(typeexpr, expect("]"), afterType)
650 if (value == "extends" || value == "implements") { cx.marked = "keyword"; return cont(typeexpr) }
651 if (value == "?") return cont(typeexpr, expect(":"), typeexpr)
652 }
653 function maybeTypeArgs(_, value) {
654 if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
655 }
656 function typeparam() {
657 return pass(typeexpr, maybeTypeDefault)
658 }
659 function maybeTypeDefault(_, value) {
660 if (value == "=") return cont(typeexpr)
661 }
662 function vardef(_, value) {
663 if (value == "enum") {cx.marked = "keyword"; return cont(enumdef)}
664 return pass(pattern, maybetype, maybeAssign, vardefCont);
665 }
666 function pattern(type, value) {
667 if (isTS && isModifier(value)) { cx.marked = "keyword"; return cont(pattern) }
668 if (type == "variable") { register(value); return cont(); }
669 if (type == "spread") return cont(pattern);
670 if (type == "[") return contCommasep(eltpattern, "]");
671 if (type == "{") return contCommasep(proppattern, "}");
672 }
673 function proppattern(type, value) {
674 if (type == "variable" && !cx.stream.match(/^\s*:/, false)) {
675 register(value);
676 return cont(maybeAssign);
677 }
678 if (type == "variable") cx.marked = "property";
679 if (type == "spread") return cont(pattern);
680 if (type == "}") return pass();
681 if (type == "[") return cont(expression, expect(']'), expect(':'), proppattern);
682 return cont(expect(":"), pattern, maybeAssign);
683 }
684 function eltpattern() {
685 return pass(pattern, maybeAssign)
686 }
687 function maybeAssign(_type, value) {
688 if (value == "=") return cont(expressionNoComma);
689 }
690 function vardefCont(type) {
691 if (type == ",") return cont(vardef);
692 }
693 function maybeelse(type, value) {
694 if (type == "keyword b" && value == "else") return cont(pushlex("form", "else"), statement, poplex);
695 }
696 function forspec(type, value) {
697 if (value == "await") return cont(forspec);
698 if (type == "(") return cont(pushlex(")"), forspec1, poplex);
699 }
700 function forspec1(type) {
701 if (type == "var") return cont(vardef, forspec2);
702 if (type == "variable") return cont(forspec2);
703 return pass(forspec2)
704 }
705 function forspec2(type, value) {
706 if (type == ")") return cont()
707 if (type == ";") return cont(forspec2)
708 if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression, forspec2) }
709 return pass(expression, forspec2)
710 }
711 function functiondef(type, value) {
712 if (value == "*") {cx.marked = "keyword"; return cont(functiondef);}
713 if (type == "variable") {register(value); return cont(functiondef);}
714 if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, mayberettype, statement, popcontext);
715 if (isTS && value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, functiondef)
716 }
717 function functiondecl(type, value) {
718 if (value == "*") {cx.marked = "keyword"; return cont(functiondecl);}
719 if (type == "variable") {register(value); return cont(functiondecl);}
720 if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, mayberettype, popcontext);
721 if (isTS && value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, functiondecl)
722 }
723 function typename(type, value) {
724 if (type == "keyword" || type == "variable") {
725 cx.marked = "type"
726 return cont(typename)
727 } else if (value == "<") {
728 return cont(pushlex(">"), commasep(typeparam, ">"), poplex)
729 }
730 }
731 function funarg(type, value) {
732 if (value == "@") cont(expression, funarg)
733 if (type == "spread") return cont(funarg);
734 if (isTS && isModifier(value)) { cx.marked = "keyword"; return cont(funarg); }
735 if (isTS && type == "this") return cont(maybetype, maybeAssign)
736 return pass(pattern, maybetype, maybeAssign);
737 }
738 function classExpression(type, value) {
739 // Class expressions may have an optional name.
740 if (type == "variable") return className(type, value);
741 return classNameAfter(type, value);
742 }
743 function className(type, value) {
744 if (type == "variable") {register(value); return cont(classNameAfter);}
745 }
746 function classNameAfter(type, value) {
747 if (value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, classNameAfter)
748 if (value == "extends" || value == "implements" || (isTS && type == ",")) {
749 if (value == "implements") cx.marked = "keyword";
750 return cont(isTS ? typeexpr : expression, classNameAfter);
751 }
752 if (type == "{") return cont(pushlex("}"), classBody, poplex);
753 }
754 function classBody(type, value) {
755 if (type == "async" ||
756 (type == "variable" &&
757 (value == "static" || value == "get" || value == "set" || (isTS && isModifier(value))) &&
758 cx.stream.match(/^\s+[\w$\xa1-\uffff]/, false))) {
759 cx.marked = "keyword";
760 return cont(classBody);
761 }
762 if (type == "variable" || cx.style == "keyword") {
763 cx.marked = "property";
764 return cont(classfield, classBody);
765 }
766 if (type == "number" || type == "string") return cont(classfield, classBody);
767 if (type == "[")
768 return cont(expression, maybetype, expect("]"), classfield, classBody)
769 if (value == "*") {
770 cx.marked = "keyword";
771 return cont(classBody);
772 }
773 if (isTS && type == "(") return pass(functiondecl, classBody)
774 if (type == ";" || type == ",") return cont(classBody);
775 if (type == "}") return cont();
776 if (value == "@") return cont(expression, classBody)
777 }
778 function classfield(type, value) {
779 if (value == "?") return cont(classfield)
780 if (type == ":") return cont(typeexpr, maybeAssign)
781 if (value == "=") return cont(expressionNoComma)
782 var context = cx.state.lexical.prev, isInterface = context && context.info == "interface"
783 return pass(isInterface ? functiondecl : functiondef)
784 }
785 function afterExport(type, value) {
786 if (value == "*") { cx.marked = "keyword"; return cont(maybeFrom, expect(";")); }
787 if (value == "default") { cx.marked = "keyword"; return cont(expression, expect(";")); }
788 if (type == "{") return cont(commasep(exportField, "}"), maybeFrom, expect(";"));
789 return pass(statement);
790 }
791 function exportField(type, value) {
792 if (value == "as") { cx.marked = "keyword"; return cont(expect("variable")); }
793 if (type == "variable") return pass(expressionNoComma, exportField);
794 }
795 function afterImport(type) {
796 if (type == "string") return cont();
797 if (type == "(") return pass(expression);
798 return pass(importSpec, maybeMoreImports, maybeFrom);
799 }
800 function importSpec(type, value) {
801 if (type == "{") return contCommasep(importSpec, "}");
802 if (type == "variable") register(value);
803 if (value == "*") cx.marked = "keyword";
804 return cont(maybeAs);
805 }
806 function maybeMoreImports(type) {
807 if (type == ",") return cont(importSpec, maybeMoreImports)
808 }
809 function maybeAs(_type, value) {
810 if (value == "as") { cx.marked = "keyword"; return cont(importSpec); }
811 }
812 function maybeFrom(_type, value) {
813 if (value == "from") { cx.marked = "keyword"; return cont(expression); }
814 }
815 function arrayLiteral(type) {
816 if (type == "]") return cont();
817 return pass(commasep(expressionNoComma, "]"));
818 }
819 function enumdef() {
820 return pass(pushlex("form"), pattern, expect("{"), pushlex("}"), commasep(enummember, "}"), poplex, poplex)
821 }
822 function enummember() {
823 return pass(pattern, maybeAssign);
824 }
825
826 function isContinuedStatement(state, textAfter) {
827 return state.lastType == "operator" || state.lastType == "," ||
828 isOperatorChar.test(textAfter.charAt(0)) ||
829 /[,.]/.test(textAfter.charAt(0));
830 }
831
832 function expressionAllowed(stream, state, backUp) {
833 return state.tokenize == tokenBase &&
834 /^(?:operator|sof|keyword [bcd]|case|new|export|default|spread|[\[{}\(,;:]|=>)$/.test(state.lastType) ||
835 (state.lastType == "quasi" && /\{\s*$/.test(stream.string.slice(0, stream.pos - (backUp || 0))))
836 }
837
838 // Interface
839
840 return {
841 startState: function(basecolumn) {
842 var state = {
843 tokenize: tokenBase,
844 lastType: "sof",
845 cc: [],
846 lexical: new JSLexical((basecolumn || 0) - indentUnit, 0, "block", false),
847 localVars: parserConfig.localVars,
848 context: parserConfig.localVars && new Context(null, null, false),
849 indented: basecolumn || 0
850 };
851 if (parserConfig.globalVars && typeof parserConfig.globalVars == "object")
852 state.globalVars = parserConfig.globalVars;
853 return state;
854 },
855
856 token: function(stream, state) {
857 if (stream.sol()) {
858 if (!state.lexical.hasOwnProperty("align"))
859 state.lexical.align = false;
860 state.indented = stream.indentation();
861 findFatArrow(stream, state);
862 }
863 if (state.tokenize != tokenComment && stream.eatSpace()) return null;
864 var style = state.tokenize(stream, state);
865 if (type == "comment") return style;
866 state.lastType = type == "operator" && (content == "++" || content == "--") ? "incdec" : type;
867 return parseJS(state, style, type, content, stream);
868 },
869
870 indent: function(state, textAfter) {
871 if (state.tokenize == tokenComment) return CodeMirror.Pass;
872 if (state.tokenize != tokenBase) return 0;
873 var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical, top
874 // Kludge to prevent 'maybelse' from blocking lexical scope pops
875 if (!/^\s*else\b/.test(textAfter)) for (var i = state.cc.length - 1; i >= 0; --i) {
876 var c = state.cc[i];
877 if (c == poplex) lexical = lexical.prev;
878 else if (c != maybeelse) break;
879 }
880 while ((lexical.type == "stat" || lexical.type == "form") &&
881 (firstChar == "}" || ((top = state.cc[state.cc.length - 1]) &&
882 (top == maybeoperatorComma || top == maybeoperatorNoComma) &&
883 !/^[,\.=+\-*:?[\(]/.test(textAfter))))
884 lexical = lexical.prev;
885 if (statementIndent && lexical.type == ")" && lexical.prev.type == "stat")
886 lexical = lexical.prev;
887 var type = lexical.type, closing = firstChar == type;
888
889 if (type == "vardef") return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? lexical.info.length + 1 : 0);
890 else if (type == "form" && firstChar == "{") return lexical.indented;
891 else if (type == "form") return lexical.indented + indentUnit;
892 else if (type == "stat")
893 return lexical.indented + (isContinuedStatement(state, textAfter) ? statementIndent || indentUnit : 0);
894 else if (lexical.info == "switch" && !closing && parserConfig.doubleIndentSwitch != false)
895 return lexical.indented + (/^(?:case|default)\b/.test(textAfter) ? indentUnit : 2 * indentUnit);
896 else if (lexical.align) return lexical.column + (closing ? 0 : 1);
897 else return lexical.indented + (closing ? 0 : indentUnit);
898 },
899
900 electricInput: /^\s*(?:case .*?:|default:|\{|\})$/,
901 blockCommentStart: jsonMode ? null : "/*",
902 blockCommentEnd: jsonMode ? null : "*/",
903 blockCommentContinue: jsonMode ? null : " * ",
904 lineComment: jsonMode ? null : "//",
905 fold: "brace",
906 closeBrackets: "()[]{}''\"\"``",
907
908 helperType: jsonMode ? "json" : "javascript",
909 jsonldMode: jsonldMode,
910 jsonMode: jsonMode,
911
912 expressionAllowed: expressionAllowed,
913
914 skipExpression: function(state) {
915 var top = state.cc[state.cc.length - 1]
916 if (top == expression || top == expressionNoComma) state.cc.pop()
917 }
918 };
919});
920
921CodeMirror.registerHelper("wordChars", "javascript", /[\w$]/);
922
923CodeMirror.defineMIME("text/javascript", "javascript");
924CodeMirror.defineMIME("text/ecmascript", "javascript");
925CodeMirror.defineMIME("application/javascript", "javascript");
926CodeMirror.defineMIME("application/x-javascript", "javascript");
927CodeMirror.defineMIME("application/ecmascript", "javascript");
928CodeMirror.defineMIME("application/json", {name: "javascript", json: true});
929CodeMirror.defineMIME("application/x-json", {name: "javascript", json: true});
930CodeMirror.defineMIME("application/ld+json", {name: "javascript", jsonld: true});
931CodeMirror.defineMIME("text/typescript", { name: "javascript", typescript: true });
932CodeMirror.defineMIME("application/typescript", { name: "javascript", typescript: true });
933
934});