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   1  // CodeMirror, copyright (c) by Marijn Haverbeke and others
   2  // Distributed under an MIT license: https://codemirror.net/5/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  
  14  CodeMirror.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 trackScope = parserConfig.trackScope !== false
  20    var isTS = parserConfig.typescript;
  21    var wordRE = parserConfig.wordCharacters || /[\w$\xa1-\uffff]/;
  22  
  23    // Tokenizer
  24  
  25    var keywords = function(){
  26      function kw(type) {return {type: type, style: "keyword"};}
  27      var A = kw("keyword a"), B = kw("keyword b"), C = kw("keyword c"), D = kw("keyword d");
  28      var operator = kw("operator"), atom = {type: "atom", style: "atom"};
  29  
  30      return {
  31        "if": kw("if"), "while": A, "with": A, "else": B, "do": B, "try": B, "finally": B,
  32        "return": D, "break": D, "continue": D, "new": kw("new"), "delete": C, "void": C, "throw": C,
  33        "debugger": kw("debugger"), "var": kw("var"), "const": kw("var"), "let": kw("var"),
  34        "function": kw("function"), "catch": kw("catch"),
  35        "for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"),
  36        "in": operator, "typeof": operator, "instanceof": operator,
  37        "true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom,
  38        "this": kw("this"), "class": kw("class"), "super": kw("atom"),
  39        "yield": C, "export": kw("export"), "import": kw("import"), "extends": C,
  40        "await": C
  41      };
  42    }();
  43  
  44    var isOperatorChar = /[+\-*&%=<>!?|~^@]/;
  45    var isJsonldKeyword = /^@(context|id|value|language|type|container|list|set|reverse|index|base|vocab|graph)"/;
  46  
  47    function readRegexp(stream) {
  48      var escaped = false, next, inSet = false;
  49      while ((next = stream.next()) != null) {
  50        if (!escaped) {
  51          if (next == "/" && !inSet) return;
  52          if (next == "[") inSet = true;
  53          else if (inSet && next == "]") inSet = false;
  54        }
  55        escaped = !escaped && next == "\\";
  56      }
  57    }
  58  
  59    // Used as scratch variables to communicate multiple values without
  60    // consing up tons of objects.
  61    var type, content;
  62    function ret(tp, style, cont) {
  63      type = tp; content = cont;
  64      return style;
  65    }
  66    function tokenBase(stream, state) {
  67      var ch = stream.next();
  68      if (ch == '"' || ch == "'") {
  69        state.tokenize = tokenString(ch);
  70        return state.tokenize(stream, state);
  71      } else if (ch == "." && stream.match(/^\d[\d_]*(?:[eE][+\-]?[\d_]+)?/)) {
  72        return ret("number", "number");
  73      } else if (ch == "." && stream.match("..")) {
  74        return ret("spread", "meta");
  75      } else if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
  76        return ret(ch);
  77      } else if (ch == "=" && stream.eat(">")) {
  78        return ret("=>", "operator");
  79      } else if (ch == "0" && stream.match(/^(?:x[\dA-Fa-f_]+|o[0-7_]+|b[01_]+)n?/)) {
  80        return ret("number", "number");
  81      } else if (/\d/.test(ch)) {
  82        stream.match(/^[\d_]*(?:n|(?:\.[\d_]*)?(?:[eE][+\-]?[\d_]+)?)?/);
  83        return ret("number", "number");
  84      } else if (ch == "/") {
  85        if (stream.eat("*")) {
  86          state.tokenize = tokenComment;
  87          return tokenComment(stream, state);
  88        } else if (stream.eat("/")) {
  89          stream.skipToEnd();
  90          return ret("comment", "comment");
  91        } else if (expressionAllowed(stream, state, 1)) {
  92          readRegexp(stream);
  93          stream.match(/^\b(([gimyus])(?![gimyus]*\2))+\b/);
  94          return ret("regexp", "string-2");
  95        } else {
  96          stream.eat("=");
  97          return ret("operator", "operator", stream.current());
  98        }
  99      } else if (ch == "`") {
 100        state.tokenize = tokenQuasi;
 101        return tokenQuasi(stream, state);
 102      } else if (ch == "#" && stream.peek() == "!") {
 103        stream.skipToEnd();
 104        return ret("meta", "meta");
 105      } else if (ch == "#" && stream.eatWhile(wordRE)) {
 106        return ret("variable", "property")
 107      } else if (ch == "<" && stream.match("!--") ||
 108                 (ch == "-" && stream.match("->") && !/\S/.test(stream.string.slice(0, stream.start)))) {
 109        stream.skipToEnd()
 110        return ret("comment", "comment")
 111      } else if (isOperatorChar.test(ch)) {
 112        if (ch != ">" || !state.lexical || state.lexical.type != ">") {
 113          if (stream.eat("=")) {
 114            if (ch == "!" || ch == "=") stream.eat("=")
 115          } else if (/[<>*+\-|&?]/.test(ch)) {
 116            stream.eat(ch)
 117            if (ch == ">") stream.eat(ch)
 118          }
 119        }
 120        if (ch == "?" && stream.eat(".")) return ret(".")
 121        return ret("operator", "operator", stream.current());
 122      } else if (wordRE.test(ch)) {
 123        stream.eatWhile(wordRE);
 124        var word = stream.current()
 125        if (state.lastType != ".") {
 126          if (keywords.propertyIsEnumerable(word)) {
 127            var kw = keywords[word]
 128            return ret(kw.type, kw.style, word)
 129          }
 130          if (word == "async" && stream.match(/^(\s|\/\*([^*]|\*(?!\/))*?\*\/)*[\[\(\w]/, false))
 131            return ret("async", "keyword", word)
 132        }
 133        return ret("variable", "variable", word)
 134      }
 135    }
 136  
 137    function tokenString(quote) {
 138      return function(stream, state) {
 139        var escaped = false, next;
 140        if (jsonldMode && stream.peek() == "@" && stream.match(isJsonldKeyword)){
 141          state.tokenize = tokenBase;
 142          return ret("jsonld-keyword", "meta");
 143        }
 144        while ((next = stream.next()) != null) {
 145          if (next == quote && !escaped) break;
 146          escaped = !escaped && next == "\\";
 147        }
 148        if (!escaped) state.tokenize = tokenBase;
 149        return ret("string", "string");
 150      };
 151    }
 152  
 153    function tokenComment(stream, state) {
 154      var maybeEnd = false, ch;
 155      while (ch = stream.next()) {
 156        if (ch == "/" && maybeEnd) {
 157          state.tokenize = tokenBase;
 158          break;
 159        }
 160        maybeEnd = (ch == "*");
 161      }
 162      return ret("comment", "comment");
 163    }
 164  
 165    function tokenQuasi(stream, state) {
 166      var escaped = false, next;
 167      while ((next = stream.next()) != null) {
 168        if (!escaped && (next == "`" || next == "$" && stream.eat("{"))) {
 169          state.tokenize = tokenBase;
 170          break;
 171        }
 172        escaped = !escaped && next == "\\";
 173      }
 174      return ret("quasi", "string-2", stream.current());
 175    }
 176  
 177    var brackets = "([{}])";
 178    // This is a crude lookahead trick to try and notice that we're
 179    // parsing the argument patterns for a fat-arrow function before we
 180    // actually hit the arrow token. It only works if the arrow is on
 181    // the same line as the arguments and there's no strange noise
 182    // (comments) in between. Fallback is to only notice when we hit the
 183    // arrow, and not declare the arguments as locals for the arrow
 184    // body.
 185    function findFatArrow(stream, state) {
 186      if (state.fatArrowAt) state.fatArrowAt = null;
 187      var arrow = stream.string.indexOf("=>", stream.start);
 188      if (arrow < 0) return;
 189  
 190      if (isTS) { // Try to skip TypeScript return type declarations after the arguments
 191        var m = /:\s*(?:\w+(?:<[^>]*>|\[\])?|\{[^}]*\})\s*$/.exec(stream.string.slice(stream.start, arrow))
 192        if (m) arrow = m.index
 193      }
 194  
 195      var depth = 0, sawSomething = false;
 196      for (var pos = arrow - 1; pos >= 0; --pos) {
 197        var ch = stream.string.charAt(pos);
 198        var bracket = brackets.indexOf(ch);
 199        if (bracket >= 0 && bracket < 3) {
 200          if (!depth) { ++pos; break; }
 201          if (--depth == 0) { if (ch == "(") sawSomething = true; break; }
 202        } else if (bracket >= 3 && bracket < 6) {
 203          ++depth;
 204        } else if (wordRE.test(ch)) {
 205          sawSomething = true;
 206        } else if (/["'\/`]/.test(ch)) {
 207          for (;; --pos) {
 208            if (pos == 0) return
 209            var next = stream.string.charAt(pos - 1)
 210            if (next == ch && stream.string.charAt(pos - 2) != "\\") { pos--; break }
 211          }
 212        } else if (sawSomething && !depth) {
 213          ++pos;
 214          break;
 215        }
 216      }
 217      if (sawSomething && !depth) state.fatArrowAt = pos;
 218    }
 219  
 220    // Parser
 221  
 222    var atomicTypes = {"atom": true, "number": true, "variable": true, "string": true,
 223                       "regexp": true, "this": true, "import": true, "jsonld-keyword": true};
 224  
 225    function JSLexical(indented, column, type, align, prev, info) {
 226      this.indented = indented;
 227      this.column = column;
 228      this.type = type;
 229      this.prev = prev;
 230      this.info = info;
 231      if (align != null) this.align = align;
 232    }
 233  
 234    function inScope(state, varname) {
 235      if (!trackScope) return false
 236      for (var v = state.localVars; v; v = v.next)
 237        if (v.name == varname) return true;
 238      for (var cx = state.context; cx; cx = cx.prev) {
 239        for (var v = cx.vars; v; v = v.next)
 240          if (v.name == varname) return true;
 241      }
 242    }
 243  
 244    function parseJS(state, style, type, content, stream) {
 245      var cc = state.cc;
 246      // Communicate our context to the combinators.
 247      // (Less wasteful than consing up a hundred closures on every call.)
 248      cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc; cx.style = style;
 249  
 250      if (!state.lexical.hasOwnProperty("align"))
 251        state.lexical.align = true;
 252  
 253      while(true) {
 254        var combinator = cc.length ? cc.pop() : jsonMode ? expression : statement;
 255        if (combinator(type, content)) {
 256          while(cc.length && cc[cc.length - 1].lex)
 257            cc.pop()();
 258          if (cx.marked) return cx.marked;
 259          if (type == "variable" && inScope(state, content)) return "variable-2";
 260          return style;
 261        }
 262      }
 263    }
 264  
 265    // Combinator utils
 266  
 267    var cx = {state: null, column: null, marked: null, cc: null};
 268    function pass() {
 269      for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]);
 270    }
 271    function cont() {
 272      pass.apply(null, arguments);
 273      return true;
 274    }
 275    function inList(name, list) {
 276      for (var v = list; v; v = v.next) if (v.name == name) return true
 277      return false;
 278    }
 279    function register(varname) {
 280      var state = cx.state;
 281      cx.marked = "def";
 282      if (!trackScope) return
 283      if (state.context) {
 284        if (state.lexical.info == "var" && state.context && state.context.block) {
 285          // FIXME function decls are also not block scoped
 286          var newContext = registerVarScoped(varname, state.context)
 287          if (newContext != null) {
 288            state.context = newContext
 289            return
 290          }
 291        } else if (!inList(varname, state.localVars)) {
 292          state.localVars = new Var(varname, state.localVars)
 293          return
 294        }
 295      }
 296      // Fall through means this is global
 297      if (parserConfig.globalVars && !inList(varname, state.globalVars))
 298        state.globalVars = new Var(varname, state.globalVars)
 299    }
 300    function registerVarScoped(varname, context) {
 301      if (!context) {
 302        return null
 303      } else if (context.block) {
 304        var inner = registerVarScoped(varname, context.prev)
 305        if (!inner) return null
 306        if (inner == context.prev) return context
 307        return new Context(inner, context.vars, true)
 308      } else if (inList(varname, context.vars)) {
 309        return context
 310      } else {
 311        return new Context(context.prev, new Var(varname, context.vars), false)
 312      }
 313    }
 314  
 315    function isModifier(name) {
 316      return name == "public" || name == "private" || name == "protected" || name == "abstract" || name == "readonly"
 317    }
 318  
 319    // Combinators
 320  
 321    function Context(prev, vars, block) { this.prev = prev; this.vars = vars; this.block = block }
 322    function Var(name, next) { this.name = name; this.next = next }
 323  
 324    var defaultVars = new Var("this", new Var("arguments", null))
 325    function pushcontext() {
 326      cx.state.context = new Context(cx.state.context, cx.state.localVars, false)
 327      cx.state.localVars = defaultVars
 328    }
 329    function pushblockcontext() {
 330      cx.state.context = new Context(cx.state.context, cx.state.localVars, true)
 331      cx.state.localVars = null
 332    }
 333    pushcontext.lex = pushblockcontext.lex = true
 334    function popcontext() {
 335      cx.state.localVars = cx.state.context.vars
 336      cx.state.context = cx.state.context.prev
 337    }
 338    popcontext.lex = true
 339    function pushlex(type, info) {
 340      var result = function() {
 341        var state = cx.state, indent = state.indented;
 342        if (state.lexical.type == "stat") indent = state.lexical.indented;
 343        else for (var outer = state.lexical; outer && outer.type == ")" && outer.align; outer = outer.prev)
 344          indent = outer.indented;
 345        state.lexical = new JSLexical(indent, cx.stream.column(), type, null, state.lexical, info);
 346      };
 347      result.lex = true;
 348      return result;
 349    }
 350    function poplex() {
 351      var state = cx.state;
 352      if (state.lexical.prev) {
 353        if (state.lexical.type == ")")
 354          state.indented = state.lexical.indented;
 355        state.lexical = state.lexical.prev;
 356      }
 357    }
 358    poplex.lex = true;
 359  
 360    function expect(wanted) {
 361      function exp(type) {
 362        if (type == wanted) return cont();
 363        else if (wanted == ";" || type == "}" || type == ")" || type == "]") return pass();
 364        else return cont(exp);
 365      };
 366      return exp;
 367    }
 368  
 369    function statement(type, value) {
 370      if (type == "var") return cont(pushlex("vardef", value), vardef, expect(";"), poplex);
 371      if (type == "keyword a") return cont(pushlex("form"), parenExpr, statement, poplex);
 372      if (type == "keyword b") return cont(pushlex("form"), statement, poplex);
 373      if (type == "keyword d") return cx.stream.match(/^\s*$/, false) ? cont() : cont(pushlex("stat"), maybeexpression, expect(";"), poplex);
 374      if (type == "debugger") return cont(expect(";"));
 375      if (type == "{") return cont(pushlex("}"), pushblockcontext, block, poplex, popcontext);
 376      if (type == ";") return cont();
 377      if (type == "if") {
 378        if (cx.state.lexical.info == "else" && cx.state.cc[cx.state.cc.length - 1] == poplex)
 379          cx.state.cc.pop()();
 380        return cont(pushlex("form"), parenExpr, statement, poplex, maybeelse);
 381      }
 382      if (type == "function") return cont(functiondef);
 383      if (type == "for") return cont(pushlex("form"), pushblockcontext, forspec, statement, popcontext, poplex);
 384      if (type == "class" || (isTS && value == "interface")) {
 385        cx.marked = "keyword"
 386        return cont(pushlex("form", type == "class" ? type : value), className, poplex)
 387      }
 388      if (type == "variable") {
 389        if (isTS && value == "declare") {
 390          cx.marked = "keyword"
 391          return cont(statement)
 392        } else if (isTS && (value == "module" || value == "enum" || value == "type") && cx.stream.match(/^\s*\w/, false)) {
 393          cx.marked = "keyword"
 394          if (value == "enum") return cont(enumdef);
 395          else if (value == "type") return cont(typename, expect("operator"), typeexpr, expect(";"));
 396          else return cont(pushlex("form"), pattern, expect("{"), pushlex("}"), block, poplex, poplex)
 397        } else if (isTS && value == "namespace") {
 398          cx.marked = "keyword"
 399          return cont(pushlex("form"), expression, statement, poplex)
 400        } else if (isTS && value == "abstract") {
 401          cx.marked = "keyword"
 402          return cont(statement)
 403        } else {
 404          return cont(pushlex("stat"), maybelabel);
 405        }
 406      }
 407      if (type == "switch") return cont(pushlex("form"), parenExpr, expect("{"), pushlex("}", "switch"), pushblockcontext,
 408                                        block, poplex, poplex, popcontext);
 409      if (type == "case") return cont(expression, expect(":"));
 410      if (type == "default") return cont(expect(":"));
 411      if (type == "catch") return cont(pushlex("form"), pushcontext, maybeCatchBinding, statement, poplex, popcontext);
 412      if (type == "export") return cont(pushlex("stat"), afterExport, poplex);
 413      if (type == "import") return cont(pushlex("stat"), afterImport, poplex);
 414      if (type == "async") return cont(statement)
 415      if (value == "@") return cont(expression, statement)
 416      return pass(pushlex("stat"), expression, expect(";"), poplex);
 417    }
 418    function maybeCatchBinding(type) {
 419      if (type == "(") return cont(funarg, expect(")"))
 420    }
 421    function expression(type, value) {
 422      return expressionInner(type, value, false);
 423    }
 424    function expressionNoComma(type, value) {
 425      return expressionInner(type, value, true);
 426    }
 427    function parenExpr(type) {
 428      if (type != "(") return pass()
 429      return cont(pushlex(")"), maybeexpression, expect(")"), poplex)
 430    }
 431    function expressionInner(type, value, noComma) {
 432      if (cx.state.fatArrowAt == cx.stream.start) {
 433        var body = noComma ? arrowBodyNoComma : arrowBody;
 434        if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, expect("=>"), body, popcontext);
 435        else if (type == "variable") return pass(pushcontext, pattern, expect("=>"), body, popcontext);
 436      }
 437  
 438      var maybeop = noComma ? maybeoperatorNoComma : maybeoperatorComma;
 439      if (atomicTypes.hasOwnProperty(type)) return cont(maybeop);
 440      if (type == "function") return cont(functiondef, maybeop);
 441      if (type == "class" || (isTS && value == "interface")) { cx.marked = "keyword"; return cont(pushlex("form"), classExpression, poplex); }
 442      if (type == "keyword c" || type == "async") return cont(noComma ? expressionNoComma : expression);
 443      if (type == "(") return cont(pushlex(")"), maybeexpression, expect(")"), poplex, maybeop);
 444      if (type == "operator" || type == "spread") return cont(noComma ? expressionNoComma : expression);
 445      if (type == "[") return cont(pushlex("]"), arrayLiteral, poplex, maybeop);
 446      if (type == "{") return contCommasep(objprop, "}", null, maybeop);
 447      if (type == "quasi") return pass(quasi, maybeop);
 448      if (type == "new") return cont(maybeTarget(noComma));
 449      return cont();
 450    }
 451    function maybeexpression(type) {
 452      if (type.match(/[;\}\)\],]/)) return pass();
 453      return pass(expression);
 454    }
 455  
 456    function maybeoperatorComma(type, value) {
 457      if (type == ",") return cont(maybeexpression);
 458      return maybeoperatorNoComma(type, value, false);
 459    }
 460    function maybeoperatorNoComma(type, value, noComma) {
 461      var me = noComma == false ? maybeoperatorComma : maybeoperatorNoComma;
 462      var expr = noComma == false ? expression : expressionNoComma;
 463      if (type == "=>") return cont(pushcontext, noComma ? arrowBodyNoComma : arrowBody, popcontext);
 464      if (type == "operator") {
 465        if (/\+\+|--/.test(value) || isTS && value == "!") return cont(me);
 466        if (isTS && value == "<" && cx.stream.match(/^([^<>]|<[^<>]*>)*>\s*\(/, false))
 467          return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, me);
 468        if (value == "?") return cont(expression, expect(":"), expr);
 469        return cont(expr);
 470      }
 471      if (type == "quasi") { return pass(quasi, me); }
 472      if (type == ";") return;
 473      if (type == "(") return contCommasep(expressionNoComma, ")", "call", me);
 474      if (type == ".") return cont(property, me);
 475      if (type == "[") return cont(pushlex("]"), maybeexpression, expect("]"), poplex, me);
 476      if (isTS && value == "as") { cx.marked = "keyword"; return cont(typeexpr, me) }
 477      if (type == "regexp") {
 478        cx.state.lastType = cx.marked = "operator"
 479        cx.stream.backUp(cx.stream.pos - cx.stream.start - 1)
 480        return cont(expr)
 481      }
 482    }
 483    function quasi(type, value) {
 484      if (type != "quasi") return pass();
 485      if (value.slice(value.length - 2) != "${") return cont(quasi);
 486      return cont(maybeexpression, continueQuasi);
 487    }
 488    function continueQuasi(type) {
 489      if (type == "}") {
 490        cx.marked = "string-2";
 491        cx.state.tokenize = tokenQuasi;
 492        return cont(quasi);
 493      }
 494    }
 495    function arrowBody(type) {
 496      findFatArrow(cx.stream, cx.state);
 497      return pass(type == "{" ? statement : expression);
 498    }
 499    function arrowBodyNoComma(type) {
 500      findFatArrow(cx.stream, cx.state);
 501      return pass(type == "{" ? statement : expressionNoComma);
 502    }
 503    function maybeTarget(noComma) {
 504      return function(type) {
 505        if (type == ".") return cont(noComma ? targetNoComma : target);
 506        else if (type == "variable" && isTS) return cont(maybeTypeArgs, noComma ? maybeoperatorNoComma : maybeoperatorComma)
 507        else return pass(noComma ? expressionNoComma : expression);
 508      };
 509    }
 510    function target(_, value) {
 511      if (value == "target") { cx.marked = "keyword"; return cont(maybeoperatorComma); }
 512    }
 513    function targetNoComma(_, value) {
 514      if (value == "target") { cx.marked = "keyword"; return cont(maybeoperatorNoComma); }
 515    }
 516    function maybelabel(type) {
 517      if (type == ":") return cont(poplex, statement);
 518      return pass(maybeoperatorComma, expect(";"), poplex);
 519    }
 520    function property(type) {
 521      if (type == "variable") {cx.marked = "property"; return cont();}
 522    }
 523    function objprop(type, value) {
 524      if (type == "async") {
 525        cx.marked = "property";
 526        return cont(objprop);
 527      } else if (type == "variable" || cx.style == "keyword") {
 528        cx.marked = "property";
 529        if (value == "get" || value == "set") return cont(getterSetter);
 530        var m // Work around fat-arrow-detection complication for detecting typescript typed arrow params
 531        if (isTS && cx.state.fatArrowAt == cx.stream.start && (m = cx.stream.match(/^\s*:\s*/, false)))
 532          cx.state.fatArrowAt = cx.stream.pos + m[0].length
 533        return cont(afterprop);
 534      } else if (type == "number" || type == "string") {
 535        cx.marked = jsonldMode ? "property" : (cx.style + " property");
 536        return cont(afterprop);
 537      } else if (type == "jsonld-keyword") {
 538        return cont(afterprop);
 539      } else if (isTS && isModifier(value)) {
 540        cx.marked = "keyword"
 541        return cont(objprop)
 542      } else if (type == "[") {
 543        return cont(expression, maybetype, expect("]"), afterprop);
 544      } else if (type == "spread") {
 545        return cont(expressionNoComma, afterprop);
 546      } else if (value == "*") {
 547        cx.marked = "keyword";
 548        return cont(objprop);
 549      } else if (type == ":") {
 550        return pass(afterprop)
 551      }
 552    }
 553    function getterSetter(type) {
 554      if (type != "variable") return pass(afterprop);
 555      cx.marked = "property";
 556      return cont(functiondef);
 557    }
 558    function afterprop(type) {
 559      if (type == ":") return cont(expressionNoComma);
 560      if (type == "(") return pass(functiondef);
 561    }
 562    function commasep(what, end, sep) {
 563      function proceed(type, value) {
 564        if (sep ? sep.indexOf(type) > -1 : type == ",") {
 565          var lex = cx.state.lexical;
 566          if (lex.info == "call") lex.pos = (lex.pos || 0) + 1;
 567          return cont(function(type, value) {
 568            if (type == end || value == end) return pass()
 569            return pass(what)
 570          }, proceed);
 571        }
 572        if (type == end || value == end) return cont();
 573        if (sep && sep.indexOf(";") > -1) return pass(what)
 574        return cont(expect(end));
 575      }
 576      return function(type, value) {
 577        if (type == end || value == end) return cont();
 578        return pass(what, proceed);
 579      };
 580    }
 581    function contCommasep(what, end, info) {
 582      for (var i = 3; i < arguments.length; i++)
 583        cx.cc.push(arguments[i]);
 584      return cont(pushlex(end, info), commasep(what, end), poplex);
 585    }
 586    function block(type) {
 587      if (type == "}") return cont();
 588      return pass(statement, block);
 589    }
 590    function maybetype(type, value) {
 591      if (isTS) {
 592        if (type == ":") return cont(typeexpr);
 593        if (value == "?") return cont(maybetype);
 594      }
 595    }
 596    function maybetypeOrIn(type, value) {
 597      if (isTS && (type == ":" || value == "in")) return cont(typeexpr)
 598    }
 599    function mayberettype(type) {
 600      if (isTS && type == ":") {
 601        if (cx.stream.match(/^\s*\w+\s+is\b/, false)) return cont(expression, isKW, typeexpr)
 602        else return cont(typeexpr)
 603      }
 604    }
 605    function isKW(_, value) {
 606      if (value == "is") {
 607        cx.marked = "keyword"
 608        return cont()
 609      }
 610    }
 611    function typeexpr(type, value) {
 612      if (value == "keyof" || value == "typeof" || value == "infer" || value == "readonly") {
 613        cx.marked = "keyword"
 614        return cont(value == "typeof" ? expressionNoComma : typeexpr)
 615      }
 616      if (type == "variable" || value == "void") {
 617        cx.marked = "type"
 618        return cont(afterType)
 619      }
 620      if (value == "|" || value == "&") return cont(typeexpr)
 621      if (type == "string" || type == "number" || type == "atom") return cont(afterType);
 622      if (type == "[") return cont(pushlex("]"), commasep(typeexpr, "]", ","), poplex, afterType)
 623      if (type == "{") return cont(pushlex("}"), typeprops, poplex, afterType)
 624      if (type == "(") return cont(commasep(typearg, ")"), maybeReturnType, afterType)
 625      if (type == "<") return cont(commasep(typeexpr, ">"), typeexpr)
 626      if (type == "quasi") { return pass(quasiType, afterType); }
 627    }
 628    function maybeReturnType(type) {
 629      if (type == "=>") return cont(typeexpr)
 630    }
 631    function typeprops(type) {
 632      if (type.match(/[\}\)\]]/)) return cont()
 633      if (type == "," || type == ";") return cont(typeprops)
 634      return pass(typeprop, typeprops)
 635    }
 636    function typeprop(type, value) {
 637      if (type == "variable" || cx.style == "keyword") {
 638        cx.marked = "property"
 639        return cont(typeprop)
 640      } else if (value == "?" || type == "number" || type == "string") {
 641        return cont(typeprop)
 642      } else if (type == ":") {
 643        return cont(typeexpr)
 644      } else if (type == "[") {
 645        return cont(expect("variable"), maybetypeOrIn, expect("]"), typeprop)
 646      } else if (type == "(") {
 647        return pass(functiondecl, typeprop)
 648      } else if (!type.match(/[;\}\)\],]/)) {
 649        return cont()
 650      }
 651    }
 652    function quasiType(type, value) {
 653      if (type != "quasi") return pass();
 654      if (value.slice(value.length - 2) != "${") return cont(quasiType);
 655      return cont(typeexpr, continueQuasiType);
 656    }
 657    function continueQuasiType(type) {
 658      if (type == "}") {
 659        cx.marked = "string-2";
 660        cx.state.tokenize = tokenQuasi;
 661        return cont(quasiType);
 662      }
 663    }
 664    function typearg(type, value) {
 665      if (type == "variable" && cx.stream.match(/^\s*[?:]/, false) || value == "?") return cont(typearg)
 666      if (type == ":") return cont(typeexpr)
 667      if (type == "spread") return cont(typearg)
 668      return pass(typeexpr)
 669    }
 670    function afterType(type, value) {
 671      if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
 672      if (value == "|" || type == "." || value == "&") return cont(typeexpr)
 673      if (type == "[") return cont(typeexpr, expect("]"), afterType)
 674      if (value == "extends" || value == "implements") { cx.marked = "keyword"; return cont(typeexpr) }
 675      if (value == "?") return cont(typeexpr, expect(":"), typeexpr)
 676    }
 677    function maybeTypeArgs(_, value) {
 678      if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
 679    }
 680    function typeparam() {
 681      return pass(typeexpr, maybeTypeDefault)
 682    }
 683    function maybeTypeDefault(_, value) {
 684      if (value == "=") return cont(typeexpr)
 685    }
 686    function vardef(_, value) {
 687      if (value == "enum") {cx.marked = "keyword"; return cont(enumdef)}
 688      return pass(pattern, maybetype, maybeAssign, vardefCont);
 689    }
 690    function pattern(type, value) {
 691      if (isTS && isModifier(value)) { cx.marked = "keyword"; return cont(pattern) }
 692      if (type == "variable") { register(value); return cont(); }
 693      if (type == "spread") return cont(pattern);
 694      if (type == "[") return contCommasep(eltpattern, "]");
 695      if (type == "{") return contCommasep(proppattern, "}");
 696    }
 697    function proppattern(type, value) {
 698      if (type == "variable" && !cx.stream.match(/^\s*:/, false)) {
 699        register(value);
 700        return cont(maybeAssign);
 701      }
 702      if (type == "variable") cx.marked = "property";
 703      if (type == "spread") return cont(pattern);
 704      if (type == "}") return pass();
 705      if (type == "[") return cont(expression, expect(']'), expect(':'), proppattern);
 706      return cont(expect(":"), pattern, maybeAssign);
 707    }
 708    function eltpattern() {
 709      return pass(pattern, maybeAssign)
 710    }
 711    function maybeAssign(_type, value) {
 712      if (value == "=") return cont(expressionNoComma);
 713    }
 714    function vardefCont(type) {
 715      if (type == ",") return cont(vardef);
 716    }
 717    function maybeelse(type, value) {
 718      if (type == "keyword b" && value == "else") return cont(pushlex("form", "else"), statement, poplex);
 719    }
 720    function forspec(type, value) {
 721      if (value == "await") return cont(forspec);
 722      if (type == "(") return cont(pushlex(")"), forspec1, poplex);
 723    }
 724    function forspec1(type) {
 725      if (type == "var") return cont(vardef, forspec2);
 726      if (type == "variable") return cont(forspec2);
 727      return pass(forspec2)
 728    }
 729    function forspec2(type, value) {
 730      if (type == ")") return cont()
 731      if (type == ";") return cont(forspec2)
 732      if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression, forspec2) }
 733      return pass(expression, forspec2)
 734    }
 735    function functiondef(type, value) {
 736      if (value == "*") {cx.marked = "keyword"; return cont(functiondef);}
 737      if (type == "variable") {register(value); return cont(functiondef);}
 738      if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, mayberettype, statement, popcontext);
 739      if (isTS && value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, functiondef)
 740    }
 741    function functiondecl(type, value) {
 742      if (value == "*") {cx.marked = "keyword"; return cont(functiondecl);}
 743      if (type == "variable") {register(value); return cont(functiondecl);}
 744      if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, mayberettype, popcontext);
 745      if (isTS && value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, functiondecl)
 746    }
 747    function typename(type, value) {
 748      if (type == "keyword" || type == "variable") {
 749        cx.marked = "type"
 750        return cont(typename)
 751      } else if (value == "<") {
 752        return cont(pushlex(">"), commasep(typeparam, ">"), poplex)
 753      }
 754    }
 755    function funarg(type, value) {
 756      if (value == "@") cont(expression, funarg)
 757      if (type == "spread") return cont(funarg);
 758      if (isTS && isModifier(value)) { cx.marked = "keyword"; return cont(funarg); }
 759      if (isTS && type == "this") return cont(maybetype, maybeAssign)
 760      return pass(pattern, maybetype, maybeAssign);
 761    }
 762    function classExpression(type, value) {
 763      // Class expressions may have an optional name.
 764      if (type == "variable") return className(type, value);
 765      return classNameAfter(type, value);
 766    }
 767    function className(type, value) {
 768      if (type == "variable") {register(value); return cont(classNameAfter);}
 769    }
 770    function classNameAfter(type, value) {
 771      if (value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, classNameAfter)
 772      if (value == "extends" || value == "implements" || (isTS && type == ",")) {
 773        if (value == "implements") cx.marked = "keyword";
 774        return cont(isTS ? typeexpr : expression, classNameAfter);
 775      }
 776      if (type == "{") return cont(pushlex("}"), classBody, poplex);
 777    }
 778    function classBody(type, value) {
 779      if (type == "async" ||
 780          (type == "variable" &&
 781           (value == "static" || value == "get" || value == "set" || (isTS && isModifier(value))) &&
 782           cx.stream.match(/^\s+[\w$\xa1-\uffff]/, false))) {
 783        cx.marked = "keyword";
 784        return cont(classBody);
 785      }
 786      if (type == "variable" || cx.style == "keyword") {
 787        cx.marked = "property";
 788        return cont(classfield, classBody);
 789      }
 790      if (type == "number" || type == "string") return cont(classfield, classBody);
 791      if (type == "[")
 792        return cont(expression, maybetype, expect("]"), classfield, classBody)
 793      if (value == "*") {
 794        cx.marked = "keyword";
 795        return cont(classBody);
 796      }
 797      if (isTS && type == "(") return pass(functiondecl, classBody)
 798      if (type == ";" || type == ",") return cont(classBody);
 799      if (type == "}") return cont();
 800      if (value == "@") return cont(expression, classBody)
 801    }
 802    function classfield(type, value) {
 803      if (value == "!") return cont(classfield)
 804      if (value == "?") return cont(classfield)
 805      if (type == ":") return cont(typeexpr, maybeAssign)
 806      if (value == "=") return cont(expressionNoComma)
 807      var context = cx.state.lexical.prev, isInterface = context && context.info == "interface"
 808      return pass(isInterface ? functiondecl : functiondef)
 809    }
 810    function afterExport(type, value) {
 811      if (value == "*") { cx.marked = "keyword"; return cont(maybeFrom, expect(";")); }
 812      if (value == "default") { cx.marked = "keyword"; return cont(expression, expect(";")); }
 813      if (type == "{") return cont(commasep(exportField, "}"), maybeFrom, expect(";"));
 814      return pass(statement);
 815    }
 816    function exportField(type, value) {
 817      if (value == "as") { cx.marked = "keyword"; return cont(expect("variable")); }
 818      if (type == "variable") return pass(expressionNoComma, exportField);
 819    }
 820    function afterImport(type) {
 821      if (type == "string") return cont();
 822      if (type == "(") return pass(expression);
 823      if (type == ".") return pass(maybeoperatorComma);
 824      return pass(importSpec, maybeMoreImports, maybeFrom);
 825    }
 826    function importSpec(type, value) {
 827      if (type == "{") return contCommasep(importSpec, "}");
 828      if (type == "variable") register(value);
 829      if (value == "*") cx.marked = "keyword";
 830      return cont(maybeAs);
 831    }
 832    function maybeMoreImports(type) {
 833      if (type == ",") return cont(importSpec, maybeMoreImports)
 834    }
 835    function maybeAs(_type, value) {
 836      if (value == "as") { cx.marked = "keyword"; return cont(importSpec); }
 837    }
 838    function maybeFrom(_type, value) {
 839      if (value == "from") { cx.marked = "keyword"; return cont(expression); }
 840    }
 841    function arrayLiteral(type) {
 842      if (type == "]") return cont();
 843      return pass(commasep(expressionNoComma, "]"));
 844    }
 845    function enumdef() {
 846      return pass(pushlex("form"), pattern, expect("{"), pushlex("}"), commasep(enummember, "}"), poplex, poplex)
 847    }
 848    function enummember() {
 849      return pass(pattern, maybeAssign);
 850    }
 851  
 852    function isContinuedStatement(state, textAfter) {
 853      return state.lastType == "operator" || state.lastType == "," ||
 854        isOperatorChar.test(textAfter.charAt(0)) ||
 855        /[,.]/.test(textAfter.charAt(0));
 856    }
 857  
 858    function expressionAllowed(stream, state, backUp) {
 859      return state.tokenize == tokenBase &&
 860        /^(?:operator|sof|keyword [bcd]|case|new|export|default|spread|[\[{}\(,;:]|=>)$/.test(state.lastType) ||
 861        (state.lastType == "quasi" && /\{\s*$/.test(stream.string.slice(0, stream.pos - (backUp || 0))))
 862    }
 863  
 864    // Interface
 865  
 866    return {
 867      startState: function(basecolumn) {
 868        var state = {
 869          tokenize: tokenBase,
 870          lastType: "sof",
 871          cc: [],
 872          lexical: new JSLexical((basecolumn || 0) - indentUnit, 0, "block", false),
 873          localVars: parserConfig.localVars,
 874          context: parserConfig.localVars && new Context(null, null, false),
 875          indented: basecolumn || 0
 876        };
 877        if (parserConfig.globalVars && typeof parserConfig.globalVars == "object")
 878          state.globalVars = parserConfig.globalVars;
 879        return state;
 880      },
 881  
 882      token: function(stream, state) {
 883        if (stream.sol()) {
 884          if (!state.lexical.hasOwnProperty("align"))
 885            state.lexical.align = false;
 886          state.indented = stream.indentation();
 887          findFatArrow(stream, state);
 888        }
 889        if (state.tokenize != tokenComment && stream.eatSpace()) return null;
 890        var style = state.tokenize(stream, state);
 891        if (type == "comment") return style;
 892        state.lastType = type == "operator" && (content == "++" || content == "--") ? "incdec" : type;
 893        return parseJS(state, style, type, content, stream);
 894      },
 895  
 896      indent: function(state, textAfter) {
 897        if (state.tokenize == tokenComment || state.tokenize == tokenQuasi) return CodeMirror.Pass;
 898        if (state.tokenize != tokenBase) return 0;
 899        var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical, top
 900        // Kludge to prevent 'maybelse' from blocking lexical scope pops
 901        if (!/^\s*else\b/.test(textAfter)) for (var i = state.cc.length - 1; i >= 0; --i) {
 902          var c = state.cc[i];
 903          if (c == poplex) lexical = lexical.prev;
 904          else if (c != maybeelse && c != popcontext) break;
 905        }
 906        while ((lexical.type == "stat" || lexical.type == "form") &&
 907               (firstChar == "}" || ((top = state.cc[state.cc.length - 1]) &&
 908                                     (top == maybeoperatorComma || top == maybeoperatorNoComma) &&
 909                                     !/^[,\.=+\-*:?[\(]/.test(textAfter))))
 910          lexical = lexical.prev;
 911        if (statementIndent && lexical.type == ")" && lexical.prev.type == "stat")
 912          lexical = lexical.prev;
 913        var type = lexical.type, closing = firstChar == type;
 914  
 915        if (type == "vardef") return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? lexical.info.length + 1 : 0);
 916        else if (type == "form" && firstChar == "{") return lexical.indented;
 917        else if (type == "form") return lexical.indented + indentUnit;
 918        else if (type == "stat")
 919          return lexical.indented + (isContinuedStatement(state, textAfter) ? statementIndent || indentUnit : 0);
 920        else if (lexical.info == "switch" && !closing && parserConfig.doubleIndentSwitch != false)
 921          return lexical.indented + (/^(?:case|default)\b/.test(textAfter) ? indentUnit : 2 * indentUnit);
 922        else if (lexical.align) return lexical.column + (closing ? 0 : 1);
 923        else return lexical.indented + (closing ? 0 : indentUnit);
 924      },
 925  
 926      electricInput: /^\s*(?:case .*?:|default:|\{|\})$/,
 927      blockCommentStart: jsonMode ? null : "/*",
 928      blockCommentEnd: jsonMode ? null : "*/",
 929      blockCommentContinue: jsonMode ? null : " * ",
 930      lineComment: jsonMode ? null : "//",
 931      fold: "brace",
 932      closeBrackets: "()[]{}''\"\"``",
 933  
 934      helperType: jsonMode ? "json" : "javascript",
 935      jsonldMode: jsonldMode,
 936      jsonMode: jsonMode,
 937  
 938      expressionAllowed: expressionAllowed,
 939  
 940      skipExpression: function(state) {
 941        parseJS(state, "atom", "atom", "true", new CodeMirror.StringStream("", 2, null))
 942      }
 943    };
 944  });
 945  
 946  CodeMirror.registerHelper("wordChars", "javascript", /[\w$]/);
 947  
 948  CodeMirror.defineMIME("text/javascript", "javascript");
 949  CodeMirror.defineMIME("text/ecmascript", "javascript");
 950  CodeMirror.defineMIME("application/javascript", "javascript");
 951  CodeMirror.defineMIME("application/x-javascript", "javascript");
 952  CodeMirror.defineMIME("application/ecmascript", "javascript");
 953  CodeMirror.defineMIME("application/json", { name: "javascript", json: true });
 954  CodeMirror.defineMIME("application/x-json", { name: "javascript", json: true });
 955  CodeMirror.defineMIME("application/manifest+json", { name: "javascript", json: true })
 956  CodeMirror.defineMIME("application/ld+json", { name: "javascript", jsonld: true });
 957  CodeMirror.defineMIME("text/typescript", { name: "javascript", typescript: true });
 958  CodeMirror.defineMIME("application/typescript", { name: "javascript", typescript: true });
 959  
 960  });