(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('acorn')) :
  typeof define === 'function' && define.amd ? define(['exports', 'acorn'], factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory((global.acorn = global.acorn || {}, global.acorn.loose = {}), global.acorn));
})(this, (function (exports, acorn) { 'use strict';

  var dummyValue = "✖";

  function isDummy(node) { return node.name === dummyValue }

  function noop() {}

  var LooseParser = function LooseParser(input, options) {
    if ( options === void 0 ) options = {};

    this.toks = this.constructor.BaseParser.tokenizer(input, options);
    this.options = this.toks.options;
    this.input = this.toks.input;
    this.tok = this.last = {type: acorn.tokTypes.eof, start: 0, end: 0};
    this.tok.validateRegExpFlags = noop;
    this.tok.validateRegExpPattern = noop;
    if (this.options.locations) {
      var here = this.toks.curPosition();
      this.tok.loc = new acorn.SourceLocation(this.toks, here, here);
    }
    this.ahead = []; // Tokens ahead
    this.context = []; // Indentation contexted
    this.curIndent = 0;
    this.curLineStart = 0;
    this.nextLineStart = this.lineEnd(this.curLineStart) + 1;
    this.inAsync = false;
    this.inGenerator = false;
    this.inFunction = false;
  };

  LooseParser.prototype.startNode = function startNode () {
    return new acorn.Node(this.toks, this.tok.start, this.options.locations ? this.tok.loc.start : null)
  };

  LooseParser.prototype.storeCurrentPos = function storeCurrentPos () {
    return this.options.locations ? [this.tok.start, this.tok.loc.start] : this.tok.start
  };

  LooseParser.prototype.startNodeAt = function startNodeAt (pos) {
    if (this.options.locations) {
      return new acorn.Node(this.toks, pos[0], pos[1])
    } else {
      return new acorn.Node(this.toks, pos)
    }
  };

  LooseParser.prototype.finishNode = function finishNode (node, type) {
    node.type = type;
    node.end = this.last.end;
    if (this.options.locations)
      { node.loc.end = this.last.loc.end; }
    if (this.options.ranges)
      { node.range[1] = this.last.end; }
    return node
  };

  LooseParser.prototype.dummyNode = function dummyNode (type) {
    var dummy = this.startNode();
    dummy.type = type;
    dummy.end = dummy.start;
    if (this.options.locations)
      { dummy.loc.end = dummy.loc.start; }
    if (this.options.ranges)
      { dummy.range[1] = dummy.start; }
    this.last = {type: acorn.tokTypes.name, start: dummy.start, end: dummy.start, loc: dummy.loc};
    return dummy
  };

  LooseParser.prototype.dummyIdent = function dummyIdent () {
    var dummy = this.dummyNode("Identifier");
    dummy.name = dummyValue;
    return dummy
  };

  LooseParser.prototype.dummyString = function dummyString () {
    var dummy = this.dummyNode("Literal");
    dummy.value = dummy.raw = dummyValue;
    return dummy
  };

  LooseParser.prototype.eat = function eat (type) {
    if (this.tok.type === type) {
      this.next();
      return true
    } else {
      return false
    }
  };

  LooseParser.prototype.isContextual = function isContextual (name) {
    return this.tok.type === acorn.tokTypes.name && this.tok.value === name
  };

  LooseParser.prototype.eatContextual = function eatContextual (name) {
    return this.tok.value === name && this.eat(acorn.tokTypes.name)
  };

  LooseParser.prototype.canInsertSemicolon = function canInsertSemicolon () {
    return this.tok.type === acorn.tokTypes.eof || this.tok.type === acorn.tokTypes.braceR ||
      acorn.lineBreak.test(this.input.slice(this.last.end, this.tok.start))
  };

  LooseParser.prototype.semicolon = function semicolon () {
    return this.eat(acorn.tokTypes.semi)
  };

  LooseParser.prototype.expect = function expect (type) {
    if (this.eat(type)) { return true }
    for (var i = 1; i <= 2; i++) {
      if (this.lookAhead(i).type === type) {
        for (var j = 0; j < i; j++) { this.next(); }
        return true
      }
    }
  };

  LooseParser.prototype.pushCx = function pushCx () {
    this.context.push(this.curIndent);
  };

  LooseParser.prototype.popCx = function popCx () {
    this.curIndent = this.context.pop();
  };

  LooseParser.prototype.lineEnd = function lineEnd (pos) {
    while (pos < this.input.length && !acorn.isNewLine(this.input.charCodeAt(pos))) { ++pos; }
    return pos
  };

  LooseParser.prototype.indentationAfter = function indentationAfter (pos) {
    for (var count = 0;; ++pos) {
      var ch = this.input.charCodeAt(pos);
      if (ch === 32) { ++count; }
      else if (ch === 9) { count += this.options.tabSize; }
      else { return count }
    }
  };

  LooseParser.prototype.closes = function closes (closeTok, indent, line, blockHeuristic) {
    if (this.tok.type === closeTok || this.tok.type === acorn.tokTypes.eof) { return true }
    return line !== this.curLineStart && this.curIndent < indent && this.tokenStartsLine() &&
      (!blockHeuristic || this.nextLineStart >= this.input.length ||
       this.indentationAfter(this.nextLineStart) < indent)
  };

  LooseParser.prototype.tokenStartsLine = function tokenStartsLine () {
    for (var p = this.tok.start - 1; p >= this.curLineStart; --p) {
      var ch = this.input.charCodeAt(p);
      if (ch !== 9 && ch !== 32) { return false }
    }
    return true
  };

  LooseParser.prototype.extend = function extend (name, f) {
    this[name] = f(this[name]);
  };

  LooseParser.prototype.parse = function parse () {
    this.next();
    return this.parseTopLevel()
  };

  LooseParser.extend = function extend () {
      var plugins = [], len = arguments.length;
      while ( len-- ) plugins[ len ] = arguments[ len ];

    var cls = this;
    for (var i = 0; i < plugins.length; i++) { cls = plugins[i](cls); }
    return cls
  };

  LooseParser.parse = function parse (input, options) {
    return new this(input, options).parse()
  };

  // Allows plugins to extend the base parser / tokenizer used
  LooseParser.BaseParser = acorn.Parser;

  var lp$2 = LooseParser.prototype;

  function isSpace(ch) {
    return (ch < 14 && ch > 8) || ch === 32 || ch === 160 || acorn.isNewLine(ch)
  }

  lp$2.next = function() {
    this.last = this.tok;
    if (this.ahead.length)
      { this.tok = this.ahead.shift(); }
    else
      { this.tok = this.readToken(); }

    if (this.tok.start >= this.nextLineStart) {
      while (this.tok.start >= this.nextLineStart) {
        this.curLineStart = this.nextLineStart;
        this.nextLineStart = this.lineEnd(this.curLineStart) + 1;
      }
      this.curIndent = this.indentationAfter(this.curLineStart);
    }
  };

  lp$2.readToken = function() {
    for (;;) {
      try {
        this.toks.next();
        if (this.toks.type === acorn.tokTypes.dot &&
            this.input.substr(this.toks.end, 1) === "." &&
            this.options.ecmaVersion >= 6) {
          this.toks.end++;
          this.toks.type = acorn.tokTypes.ellipsis;
        }
        return new acorn.Token(this.toks)
      } catch (e) {
        if (!(e instanceof SyntaxError)) { throw e }

        // Try to skip some text, based on the error message, and then continue
        var msg = e.message, pos = e.raisedAt, replace = true;
        if (/unterminated/i.test(msg)) {
          pos = this.lineEnd(e.pos + 1);
          if (/string/.test(msg)) {
            replace = {start: e.pos, end: pos, type: acorn.tokTypes.string, value: this.input.slice(e.pos + 1, pos)};
          } else if (/regular expr/i.test(msg)) {
            var re = this.input.slice(e.pos, pos);
            try { re = new RegExp(re); } catch (e$1) { /* ignore compilation error due to new syntax */ }
            replace = {start: e.pos, end: pos, type: acorn.tokTypes.regexp, value: re};
          } else if (/template/.test(msg)) {
            replace = {
              start: e.pos,
              end: pos,
              type: acorn.tokTypes.template,
              value: this.input.slice(e.pos, pos)
            };
          } else {
            replace = false;
          }
        } else if (/invalid (unicode|regexp|number)|expecting unicode|octal literal|is reserved|directly after number|expected number in radix/i.test(msg)) {
          while (pos < this.input.length && !isSpace(this.input.charCodeAt(pos))) { ++pos; }
        } else if (/character escape|expected hexadecimal/i.test(msg)) {
          while (pos < this.input.length) {
            var ch = this.input.charCodeAt(pos++);
            if (ch === 34 || ch === 39 || acorn.isNewLine(ch)) { break }
          }
        } else if (/unexpected character/i.test(msg)) {
          pos++;
          replace = false;
        } else if (/regular expression/i.test(msg)) {
          replace = true;
        } else {
          throw e
        }
        this.resetTo(pos);
        if (replace === true) { replace = {start: pos, end: pos, type: acorn.tokTypes.name, value: dummyValue}; }
        if (replace) {
          if (this.options.locations)
            { replace.loc = new acorn.SourceLocation(
              this.toks,
              acorn.getLineInfo(this.input, replace.start),
              acorn.getLineInfo(this.input, replace.end)); }
          return replace
        }
      }
    }
  };

  lp$2.resetTo = function(pos) {
    this.toks.pos = pos;
    this.toks.containsEsc = false;
    var ch = this.input.charAt(pos - 1);
    this.toks.exprAllowed = !ch || /[[{(,;:?/*=+\-~!|&%^<>]/.test(ch) ||
      /[enwfd]/.test(ch) &&
      /\b(case|else|return|throw|new|in|(instance|type)?of|delete|void)$/.test(this.input.slice(pos - 10, pos));

    if (this.options.locations) {
      this.toks.curLine = 1;
      this.toks.lineStart = acorn.lineBreakG.lastIndex = 0;
      var match;
      while ((match = acorn.lineBreakG.exec(this.input)) && match.index < pos) {
        ++this.toks.curLine;
        this.toks.lineStart = match.index + match[0].length;
      }
    }
  };

  lp$2.lookAhead = function(n) {
    while (n > this.ahead.length)
      { this.ahead.push(this.readToken()); }
    return this.ahead[n - 1]
  };

  var lp$1 = LooseParser.prototype;

  lp$1.parseTopLevel = function() {
    var node = this.startNodeAt(this.options.locations ? [0, acorn.getLineInfo(this.input, 0)] : 0);
    node.body = [];
    while (this.tok.type !== acorn.tokTypes.eof) { node.body.push(this.parseStatement()); }
    this.toks.adaptDirectivePrologue(node.body);
    this.last = this.tok;
    node.sourceType = this.options.sourceType;
    return this.finishNode(node, "Program")
  };

  lp$1.parseStatement = function() {
    var starttype = this.tok.type, node = this.startNode(), kind;

    if (this.toks.isLet()) {
      starttype = acorn.tokTypes._var;
      kind = "let";
    }

    switch (starttype) {
    case acorn.tokTypes._break: case acorn.tokTypes._continue:
      this.next();
      var isBreak = starttype === acorn.tokTypes._break;
      if (this.semicolon() || this.canInsertSemicolon()) {
        node.label = null;
      } else {
        node.label = this.tok.type === acorn.tokTypes.name ? this.parseIdent() : null;
        this.semicolon();
      }
      return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")

    case acorn.tokTypes._debugger:
      this.next();
      this.semicolon();
      return this.finishNode(node, "DebuggerStatement")

    case acorn.tokTypes._do:
      this.next();
      node.body = this.parseStatement();
      node.test = this.eat(acorn.tokTypes._while) ? this.parseParenExpression() : this.dummyIdent();
      this.semicolon();
      return this.finishNode(node, "DoWhileStatement")

    case acorn.tokTypes._for:
      this.next(); // `for` keyword
      var isAwait = this.options.ecmaVersion >= 9 && this.eatContextual("await");

      this.pushCx();
      this.expect(acorn.tokTypes.parenL);
      if (this.tok.type === acorn.tokTypes.semi) { return this.parseFor(node, null) }
      var isLet = this.toks.isLet();
      if (isLet || this.tok.type === acorn.tokTypes._var || this.tok.type === acorn.tokTypes._const) {
        var init$1 = this.parseVar(this.startNode(), true, isLet ? "let" : this.tok.value);
        if (init$1.declarations.length === 1 && (this.tok.type === acorn.tokTypes._in || this.isContextual("of"))) {
          if (this.options.ecmaVersion >= 9 && this.tok.type !== acorn.tokTypes._in) {
            node.await = isAwait;
          }
          return this.parseForIn(node, init$1)
        }
        return this.parseFor(node, init$1)
      }
      var init = this.parseExpression(true);
      if (this.tok.type === acorn.tokTypes._in || this.isContextual("of")) {
        if (this.options.ecmaVersion >= 9 && this.tok.type !== acorn.tokTypes._in) {
          node.await = isAwait;
        }
        return this.parseForIn(node, this.toAssignable(init))
      }
      return this.parseFor(node, init)

    case acorn.tokTypes._function:
      this.next();
      return this.parseFunction(node, true)

    case acorn.tokTypes._if:
      this.next();
      node.test = this.parseParenExpression();
      node.consequent = this.parseStatement();
      node.alternate = this.eat(acorn.tokTypes._else) ? this.parseStatement() : null;
      return this.finishNode(node, "IfStatement")

    case acorn.tokTypes._return:
      this.next();
      if (this.eat(acorn.tokTypes.semi) || this.canInsertSemicolon()) { node.argument = null; }
      else { node.argument = this.parseExpression(); this.semicolon(); }
      return this.finishNode(node, "ReturnStatement")

    case acorn.tokTypes._switch:
      var blockIndent = this.curIndent, line = this.curLineStart;
      this.next();
      node.discriminant = this.parseParenExpression();
      node.cases = [];
      this.pushCx();
      this.expect(acorn.tokTypes.braceL);

      var cur;
      while (!this.closes(acorn.tokTypes.braceR, blockIndent, line, true)) {
        if (this.tok.type === acorn.tokTypes._case || this.tok.type === acorn.tokTypes._default) {
          var isCase = this.tok.type === acorn.tokTypes._case;
          if (cur) { this.finishNode(cur, "SwitchCase"); }
          node.cases.push(cur = this.startNode());
          cur.consequent = [];
          this.next();
          if (isCase) { cur.test = this.parseExpression(); }
          else { cur.test = null; }
          this.expect(acorn.tokTypes.colon);
        } else {
          if (!cur) {
            node.cases.push(cur = this.startNode());
            cur.consequent = [];
            cur.test = null;
          }
          cur.consequent.push(this.parseStatement());
        }
      }
      if (cur) { this.finishNode(cur, "SwitchCase"); }
      this.popCx();
      this.eat(acorn.tokTypes.braceR);
      return this.finishNode(node, "SwitchStatement")

    case acorn.tokTypes._throw:
      this.next();
      node.argument = this.parseExpression();
      this.semicolon();
      return this.finishNode(node, "ThrowStatement")

    case acorn.tokTypes._try:
      this.next();
      node.block = this.parseBlock();
      node.handler = null;
      if (this.tok.type === acorn.tokTypes._catch) {
        var clause = this.startNode();
        this.next();
        if (this.eat(acorn.tokTypes.parenL)) {
          clause.param = this.toAssignable(this.parseExprAtom(), true);
          this.expect(acorn.tokTypes.parenR);
        } else {
          clause.param = null;
        }
        clause.body = this.parseBlock();
        node.handler = this.finishNode(clause, "CatchClause");
      }
      node.finalizer = this.eat(acorn.tokTypes._finally) ? this.parseBlock() : null;
      if (!node.handler && !node.finalizer) { return node.block }
      return this.finishNode(node, "TryStatement")

    case acorn.tokTypes._var:
    case acorn.tokTypes._const:
      return this.parseVar(node, false, kind || this.tok.value)

    case acorn.tokTypes._while:
      this.next();
      node.test = this.parseParenExpression();
      node.body = this.parseStatement();
      return this.finishNode(node, "WhileStatement")

    case acorn.tokTypes._with:
      this.next();
      node.object = this.parseParenExpression();
      node.body = this.parseStatement();
      return this.finishNode(node, "WithStatement")

    case acorn.tokTypes.braceL:
      return this.parseBlock()

    case acorn.tokTypes.semi:
      this.next();
      return this.finishNode(node, "EmptyStatement")

    case acorn.tokTypes._class:
      return this.parseClass(true)

    case acorn.tokTypes._import:
      if (this.options.ecmaVersion > 10) {
        var nextType = this.lookAhead(1).type;
        if (nextType === acorn.tokTypes.parenL || nextType === acorn.tokTypes.dot) {
          node.expression = this.parseExpression();
          this.semicolon();
          return this.finishNode(node, "ExpressionStatement")
        }
      }

      return this.parseImport()

    case acorn.tokTypes._export:
      return this.parseExport()

    default:
      if (this.toks.isAsyncFunction()) {
        this.next();
        this.next();
        return this.parseFunction(node, true, true)
      }
      var expr = this.parseExpression();
      if (isDummy(expr)) {
        this.next();
        if (this.tok.type === acorn.tokTypes.eof) { return this.finishNode(node, "EmptyStatement") }
        return this.parseStatement()
      } else if (starttype === acorn.tokTypes.name && expr.type === "Identifier" && this.eat(acorn.tokTypes.colon)) {
        node.body = this.parseStatement();
        node.label = expr;
        return this.finishNode(node, "LabeledStatement")
      } else {
        node.expression = expr;
        this.semicolon();
        return this.finishNode(node, "ExpressionStatement")
      }
    }
  };

  lp$1.parseBlock = function() {
    var node = this.startNode();
    this.pushCx();
    this.expect(acorn.tokTypes.braceL);
    var blockIndent = this.curIndent, line = this.curLineStart;
    node.body = [];
    while (!this.closes(acorn.tokTypes.braceR, blockIndent, line, true))
      { node.body.push(this.parseStatement()); }
    this.popCx();
    this.eat(acorn.tokTypes.braceR);
    return this.finishNode(node, "BlockStatement")
  };

  lp$1.parseFor = function(node, init) {
    node.init = init;
    node.test = node.update = null;
    if (this.eat(acorn.tokTypes.semi) && this.tok.type !== acorn.tokTypes.semi) { node.test = this.parseExpression(); }
    if (this.eat(acorn.tokTypes.semi) && this.tok.type !== acorn.tokTypes.parenR) { node.update = this.parseExpression(); }
    this.popCx();
    this.expect(acorn.tokTypes.parenR);
    node.body = this.parseStatement();
    return this.finishNode(node, "ForStatement")
  };

  lp$1.parseForIn = function(node, init) {
    var type = this.tok.type === acorn.tokTypes._in ? "ForInStatement" : "ForOfStatement";
    this.next();
    node.left = init;
    node.right = this.parseExpression();
    this.popCx();
    this.expect(acorn.tokTypes.parenR);
    node.body = this.parseStatement();
    return this.finishNode(node, type)
  };

  lp$1.parseVar = function(node, noIn, kind) {
    node.kind = kind;
    this.next();
    node.declarations = [];
    do {
      var decl = this.startNode();
      decl.id = this.options.ecmaVersion >= 6 ? this.toAssignable(this.parseExprAtom(), true) : this.parseIdent();
      decl.init = this.eat(acorn.tokTypes.eq) ? this.parseMaybeAssign(noIn) : null;
      node.declarations.push(this.finishNode(decl, "VariableDeclarator"));
    } while (this.eat(acorn.tokTypes.comma))
    if (!node.declarations.length) {
      var decl$1 = this.startNode();
      decl$1.id = this.dummyIdent();
      node.declarations.push(this.finishNode(decl$1, "VariableDeclarator"));
    }
    if (!noIn) { this.semicolon(); }
    return this.finishNode(node, "VariableDeclaration")
  };

  lp$1.parseClass = function(isStatement) {
    var node = this.startNode();
    this.next();
    if (this.tok.type === acorn.tokTypes.name) { node.id = this.parseIdent(); }
    else if (isStatement === true) { node.id = this.dummyIdent(); }
    else { node.id = null; }
    node.superClass = this.eat(acorn.tokTypes._extends) ? this.parseExpression() : null;
    node.body = this.startNode();
    node.body.body = [];
    this.pushCx();
    var indent = this.curIndent + 1, line = this.curLineStart;
    this.eat(acorn.tokTypes.braceL);
    if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; }
    while (!this.closes(acorn.tokTypes.braceR, indent, line)) {
      var element = this.parseClassElement();
      if (element) { node.body.body.push(element); }
    }
    this.popCx();
    if (!this.eat(acorn.tokTypes.braceR)) {
      // If there is no closing brace, make the node span to the start
      // of the next token (this is useful for Tern)
      this.last.end = this.tok.start;
      if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
    }
    this.semicolon();
    this.finishNode(node.body, "ClassBody");
    return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
  };

  lp$1.parseClassElement = function() {
    if (this.eat(acorn.tokTypes.semi)) { return null }

    var ref = this.options;
    var ecmaVersion = ref.ecmaVersion;
    var locations = ref.locations;
    var indent = this.curIndent;
    var line = this.curLineStart;
    var node = this.startNode();
    var keyName = "";
    var isGenerator = false;
    var isAsync = false;
    var kind = "method";
    var isStatic = false;

    if (this.eatContextual("static")) {
      // Parse static init block
      if (ecmaVersion >= 13 && this.eat(acorn.tokTypes.braceL)) {
        this.parseClassStaticBlock(node);
        return node
      }
      if (this.isClassElementNameStart() || this.toks.type === acorn.tokTypes.star) {
        isStatic = true;
      } else {
        keyName = "static";
      }
    }
    node.static = isStatic;
    if (!keyName && ecmaVersion >= 8 && this.eatContextual("async")) {
      if ((this.isClassElementNameStart() || this.toks.type === acorn.tokTypes.star) && !this.canInsertSemicolon()) {
        isAsync = true;
      } else {
        keyName = "async";
      }
    }
    if (!keyName) {
      isGenerator = this.eat(acorn.tokTypes.star);
      var lastValue = this.toks.value;
      if (this.eatContextual("get") || this.eatContextual("set")) {
        if (this.isClassElementNameStart()) {
          kind = lastValue;
        } else {
          keyName = lastValue;
        }
      }
    }

    // Parse element name
    if (keyName) {
      // 'async', 'get', 'set', or 'static' were not a keyword contextually.
      // The last token is any of those. Make it the element name.
      node.computed = false;
      node.key = this.startNodeAt(locations ? [this.toks.lastTokStart, this.toks.lastTokStartLoc] : this.toks.lastTokStart);
      node.key.name = keyName;
      this.finishNode(node.key, "Identifier");
    } else {
      this.parseClassElementName(node);

      // From https://github.com/acornjs/acorn/blob/7deba41118d6384a2c498c61176b3cf434f69590/acorn-loose/src/statement.js#L291
      // Skip broken stuff.
      if (isDummy(node.key)) {
        if (isDummy(this.parseMaybeAssign())) { this.next(); }
        this.eat(acorn.tokTypes.comma);
        return null
      }
    }

    // Parse element value
    if (ecmaVersion < 13 || this.toks.type === acorn.tokTypes.parenL || kind !== "method" || isGenerator || isAsync) {
      // Method
      var isConstructor =
        !node.computed &&
        !node.static &&
        !isGenerator &&
        !isAsync &&
        kind === "method" && (
          node.key.type === "Identifier" && node.key.name === "constructor" ||
          node.key.type === "Literal" && node.key.value === "constructor"
        );
      node.kind = isConstructor ? "constructor" : kind;
      node.value = this.parseMethod(isGenerator, isAsync);
      this.finishNode(node, "MethodDefinition");
    } else {
      // Field
      if (this.eat(acorn.tokTypes.eq)) {
        if (this.curLineStart !== line && this.curIndent <= indent && this.tokenStartsLine()) {
          // Estimated the next line is the next class element by indentations.
          node.value = null;
        } else {
          var oldInAsync = this.inAsync;
          var oldInGenerator = this.inGenerator;
          this.inAsync = false;
          this.inGenerator = false;
          node.value = this.parseMaybeAssign();
          this.inAsync = oldInAsync;
          this.inGenerator = oldInGenerator;
        }
      } else {
        node.value = null;
      }
      this.semicolon();
      this.finishNode(node, "PropertyDefinition");
    }

    return node
  };

  lp$1.parseClassStaticBlock = function(node) {
    var blockIndent = this.curIndent, line = this.curLineStart;
    node.body = [];
    this.pushCx();
    while (!this.closes(acorn.tokTypes.braceR, blockIndent, line, true))
      { node.body.push(this.parseStatement()); }
    this.popCx();
    this.eat(acorn.tokTypes.braceR);

    return this.finishNode(node, "StaticBlock")
  };

  lp$1.isClassElementNameStart = function() {
    return this.toks.isClassElementNameStart()
  };

  lp$1.parseClassElementName = function(element) {
    if (this.toks.type === acorn.tokTypes.privateId) {
      element.computed = false;
      element.key = this.parsePrivateIdent();
    } else {
      this.parsePropertyName(element);
    }
  };

  lp$1.parseFunction = function(node, isStatement, isAsync) {
    var oldInAsync = this.inAsync, oldInGenerator = this.inGenerator, oldInFunction = this.inFunction;
    this.initFunction(node);
    if (this.options.ecmaVersion >= 6) {
      node.generator = this.eat(acorn.tokTypes.star);
    }
    if (this.options.ecmaVersion >= 8) {
      node.async = !!isAsync;
    }
    if (this.tok.type === acorn.tokTypes.name) { node.id = this.parseIdent(); }
    else if (isStatement === true) { node.id = this.dummyIdent(); }
    this.inAsync = node.async;
    this.inGenerator = node.generator;
    this.inFunction = true;
    node.params = this.parseFunctionParams();
    node.body = this.parseBlock();
    this.toks.adaptDirectivePrologue(node.body.body);
    this.inAsync = oldInAsync;
    this.inGenerator = oldInGenerator;
    this.inFunction = oldInFunction;
    return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
  };

  lp$1.parseExport = function() {
    var node = this.startNode();
    this.next();
    if (this.eat(acorn.tokTypes.star)) {
      if (this.options.ecmaVersion >= 11) {
        if (this.eatContextual("as")) {
          node.exported = this.parseExprAtom();
        } else {
          node.exported = null;
        }
      }
      node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString();
      this.semicolon();
      return this.finishNode(node, "ExportAllDeclaration")
    }
    if (this.eat(acorn.tokTypes._default)) {
      // export default (function foo() {}) // This is FunctionExpression.
      var isAsync;
      if (this.tok.type === acorn.tokTypes._function || (isAsync = this.toks.isAsyncFunction())) {
        var fNode = this.startNode();
        this.next();
        if (isAsync) { this.next(); }
        node.declaration = this.parseFunction(fNode, "nullableID", isAsync);
      } else if (this.tok.type === acorn.tokTypes._class) {
        node.declaration = this.parseClass("nullableID");
      } else {
        node.declaration = this.parseMaybeAssign();
        this.semicolon();
      }
      return this.finishNode(node, "ExportDefaultDeclaration")
    }
    if (this.tok.type.keyword || this.toks.isLet() || this.toks.isAsyncFunction()) {
      node.declaration = this.parseStatement();
      node.specifiers = [];
      node.source = null;
    } else {
      node.declaration = null;
      node.specifiers = this.parseExportSpecifierList();
      node.source = this.eatContextual("from") ? this.parseExprAtom() : null;
      this.semicolon();
    }
    return this.finishNode(node, "ExportNamedDeclaration")
  };

  lp$1.parseImport = function() {
    var node = this.startNode();
    this.next();
    if (this.tok.type === acorn.tokTypes.string) {
      node.specifiers = [];
      node.source = this.parseExprAtom();
    } else {
      var elt;
      if (this.tok.type === acorn.tokTypes.name && this.tok.value !== "from") {
        elt = this.startNode();
        elt.local = this.parseIdent();
        this.finishNode(elt, "ImportDefaultSpecifier");
        this.eat(acorn.tokTypes.comma);
      }
      node.specifiers = this.parseImportSpecifiers();
      node.source = this.eatContextual("from") && this.tok.type === acorn.tokTypes.string ? this.parseExprAtom() : this.dummyString();
      if (elt) { node.specifiers.unshift(elt); }
    }
    this.semicolon();
    return this.finishNode(node, "ImportDeclaration")
  };

  lp$1.parseImportSpecifiers = function() {
    var elts = [];
    if (this.tok.type === acorn.tokTypes.star) {
      var elt = this.startNode();
      this.next();
      elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent();
      elts.push(this.finishNode(elt, "ImportNamespaceSpecifier"));
    } else {
      var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart;
      this.pushCx();
      this.eat(acorn.tokTypes.braceL);
      if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; }
      while (!this.closes(acorn.tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
        var elt$1 = this.startNode();
        if (this.eat(acorn.tokTypes.star)) {
          elt$1.local = this.eatContextual("as") ? this.parseModuleExportName() : this.dummyIdent();
          this.finishNode(elt$1, "ImportNamespaceSpecifier");
        } else {
          if (this.isContextual("from")) { break }
          elt$1.imported = this.parseModuleExportName();
          if (isDummy(elt$1.imported)) { break }
          elt$1.local = this.eatContextual("as") ? this.parseModuleExportName() : elt$1.imported;
          this.finishNode(elt$1, "ImportSpecifier");
        }
        elts.push(elt$1);
        this.eat(acorn.tokTypes.comma);
      }
      this.eat(acorn.tokTypes.braceR);
      this.popCx();
    }
    return elts
  };

  lp$1.parseExportSpecifierList = function() {
    var elts = [];
    var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart;
    this.pushCx();
    this.eat(acorn.tokTypes.braceL);
    if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; }
    while (!this.closes(acorn.tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
      if (this.isContextual("from")) { break }
      var elt = this.startNode();
      elt.local = this.parseModuleExportName();
      if (isDummy(elt.local)) { break }
      elt.exported = this.eatContextual("as") ? this.parseModuleExportName() : elt.local;
      this.finishNode(elt, "ExportSpecifier");
      elts.push(elt);
      this.eat(acorn.tokTypes.comma);
    }
    this.eat(acorn.tokTypes.braceR);
    this.popCx();
    return elts
  };

  lp$1.parseModuleExportName = function() {
    return this.options.ecmaVersion >= 13 && this.tok.type === acorn.tokTypes.string
      ? this.parseExprAtom()
      : this.parseIdent()
  };

  var lp = LooseParser.prototype;

  lp.checkLVal = function(expr) {
    if (!expr) { return expr }
    switch (expr.type) {
    case "Identifier":
    case "MemberExpression":
      return expr

    case "ParenthesizedExpression":
      expr.expression = this.checkLVal(expr.expression);
      return expr

    default:
      return this.dummyIdent()
    }
  };

  lp.parseExpression = function(noIn) {
    var start = this.storeCurrentPos();
    var expr = this.parseMaybeAssign(noIn);
    if (this.tok.type === acorn.tokTypes.comma) {
      var node = this.startNodeAt(start);
      node.expressions = [expr];
      while (this.eat(acorn.tokTypes.comma)) { node.expressions.push(this.parseMaybeAssign(noIn)); }
      return this.finishNode(node, "SequenceExpression")
    }
    return expr
  };

  lp.parseParenExpression = function() {
    this.pushCx();
    this.expect(acorn.tokTypes.parenL);
    var val = this.parseExpression();
    this.popCx();
    this.expect(acorn.tokTypes.parenR);
    return val
  };

  lp.parseMaybeAssign = function(noIn) {
    // `yield` should be an identifier reference if it's not in generator functions.
    if (this.inGenerator && this.toks.isContextual("yield")) {
      var node = this.startNode();
      this.next();
      if (this.semicolon() || this.canInsertSemicolon() || (this.tok.type !== acorn.tokTypes.star && !this.tok.type.startsExpr)) {
        node.delegate = false;
        node.argument = null;
      } else {
        node.delegate = this.eat(acorn.tokTypes.star);
        node.argument = this.parseMaybeAssign();
      }
      return this.finishNode(node, "YieldExpression")
    }

    var start = this.storeCurrentPos();
    var left = this.parseMaybeConditional(noIn);
    if (this.tok.type.isAssign) {
      var node$1 = this.startNodeAt(start);
      node$1.operator = this.tok.value;
      node$1.left = this.tok.type === acorn.tokTypes.eq ? this.toAssignable(left) : this.checkLVal(left);
      this.next();
      node$1.right = this.parseMaybeAssign(noIn);
      return this.finishNode(node$1, "AssignmentExpression")
    }
    return left
  };

  lp.parseMaybeConditional = function(noIn) {
    var start = this.storeCurrentPos();
    var expr = this.parseExprOps(noIn);
    if (this.eat(acorn.tokTypes.question)) {
      var node = this.startNodeAt(start);
      node.test = expr;
      node.consequent = this.parseMaybeAssign();
      node.alternate = this.expect(acorn.tokTypes.colon) ? this.parseMaybeAssign(noIn) : this.dummyIdent();
      return this.finishNode(node, "ConditionalExpression")
    }
    return expr
  };

  lp.parseExprOps = function(noIn) {
    var start = this.storeCurrentPos();
    var indent = this.curIndent, line = this.curLineStart;
    return this.parseExprOp(this.parseMaybeUnary(false), start, -1, noIn, indent, line)
  };

  lp.parseExprOp = function(left, start, minPrec, noIn, indent, line) {
    if (this.curLineStart !== line && this.curIndent < indent && this.tokenStartsLine()) { return left }
    var prec = this.tok.type.binop;
    if (prec != null && (!noIn || this.tok.type !== acorn.tokTypes._in)) {
      if (prec > minPrec) {
        var node = this.startNodeAt(start);
        node.left = left;
        node.operator = this.tok.value;
        this.next();
        if (this.curLineStart !== line && this.curIndent < indent && this.tokenStartsLine()) {
          node.right = this.dummyIdent();
        } else {
          var rightStart = this.storeCurrentPos();
          node.right = this.parseExprOp(this.parseMaybeUnary(false), rightStart, prec, noIn, indent, line);
        }
        this.finishNode(node, /&&|\|\||\?\?/.test(node.operator) ? "LogicalExpression" : "BinaryExpression");
        return this.parseExprOp(node, start, minPrec, noIn, indent, line)
      }
    }
    return left
  };

  lp.parseMaybeUnary = function(sawUnary) {
    var start = this.storeCurrentPos(), expr;
    if (this.options.ecmaVersion >= 8 && this.toks.isContextual("await") &&
        (this.inAsync || (this.toks.inModule && this.options.ecmaVersion >= 13) ||
         (!this.inFunction && this.options.allowAwaitOutsideFunction))) {
      expr = this.parseAwait();
      sawUnary = true;
    } else if (this.tok.type.prefix) {
      var node = this.startNode(), update = this.tok.type === acorn.tokTypes.incDec;
      if (!update) { sawUnary = true; }
      node.operator = this.tok.value;
      node.prefix = true;
      this.next();
      node.argument = this.parseMaybeUnary(true);
      if (update) { node.argument = this.checkLVal(node.argument); }
      expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
    } else if (this.tok.type === acorn.tokTypes.ellipsis) {
      var node$1 = this.startNode();
      this.next();
      node$1.argument = this.parseMaybeUnary(sawUnary);
      expr = this.finishNode(node$1, "SpreadElement");
    } else if (!sawUnary && this.tok.type === acorn.tokTypes.privateId) {
      expr = this.parsePrivateIdent();
    } else {
      expr = this.parseExprSubscripts();
      while (this.tok.type.postfix && !this.canInsertSemicolon()) {
        var node$2 = this.startNodeAt(start);
        node$2.operator = this.tok.value;
        node$2.prefix = false;
        node$2.argument = this.checkLVal(expr);
        this.next();
        expr = this.finishNode(node$2, "UpdateExpression");
      }
    }

    if (!sawUnary && this.eat(acorn.tokTypes.starstar)) {
      var node$3 = this.startNodeAt(start);
      node$3.operator = "**";
      node$3.left = expr;
      node$3.right = this.parseMaybeUnary(false);
      return this.finishNode(node$3, "BinaryExpression")
    }

    return expr
  };

  lp.parseExprSubscripts = function() {
    var start = this.storeCurrentPos();
    return this.parseSubscripts(this.parseExprAtom(), start, false, this.curIndent, this.curLineStart)
  };

  lp.parseSubscripts = function(base, start, noCalls, startIndent, line) {
    var optionalSupported = this.options.ecmaVersion >= 11;
    var optionalChained = false;
    for (;;) {
      if (this.curLineStart !== line && this.curIndent <= startIndent && this.tokenStartsLine()) {
        if (this.tok.type === acorn.tokTypes.dot && this.curIndent === startIndent)
          { --startIndent; }
        else
          { break }
      }

      var maybeAsyncArrow = base.type === "Identifier" && base.name === "async" && !this.canInsertSemicolon();
      var optional = optionalSupported && this.eat(acorn.tokTypes.questionDot);
      if (optional) {
        optionalChained = true;
      }

      if ((optional && this.tok.type !== acorn.tokTypes.parenL && this.tok.type !== acorn.tokTypes.bracketL && this.tok.type !== acorn.tokTypes.backQuote) || this.eat(acorn.tokTypes.dot)) {
        var node = this.startNodeAt(start);
        node.object = base;
        if (this.curLineStart !== line && this.curIndent <= startIndent && this.tokenStartsLine())
          { node.property = this.dummyIdent(); }
        else
          { node.property = this.parsePropertyAccessor() || this.dummyIdent(); }
        node.computed = false;
        if (optionalSupported) {
          node.optional = optional;
        }
        base = this.finishNode(node, "MemberExpression");
      } else if (this.tok.type === acorn.tokTypes.bracketL) {
        this.pushCx();
        this.next();
        var node$1 = this.startNodeAt(start);
        node$1.object = base;
        node$1.property = this.parseExpression();
        node$1.computed = true;
        if (optionalSupported) {
          node$1.optional = optional;
        }
        this.popCx();
        this.expect(acorn.tokTypes.bracketR);
        base = this.finishNode(node$1, "MemberExpression");
      } else if (!noCalls && this.tok.type === acorn.tokTypes.parenL) {
        var exprList = this.parseExprList(acorn.tokTypes.parenR);
        if (maybeAsyncArrow && this.eat(acorn.tokTypes.arrow))
          { return this.parseArrowExpression(this.startNodeAt(start), exprList, true) }
        var node$2 = this.startNodeAt(start);
        node$2.callee = base;
        node$2.arguments = exprList;
        if (optionalSupported) {
          node$2.optional = optional;
        }
        base = this.finishNode(node$2, "CallExpression");
      } else if (this.tok.type === acorn.tokTypes.backQuote) {
        var node$3 = this.startNodeAt(start);
        node$3.tag = base;
        node$3.quasi = this.parseTemplate();
        base = this.finishNode(node$3, "TaggedTemplateExpression");
      } else {
        break
      }
    }

    if (optionalChained) {
      var chainNode = this.startNodeAt(start);
      chainNode.expression = base;
      base = this.finishNode(chainNode, "ChainExpression");
    }
    return base
  };

  lp.parseExprAtom = function() {
    var node;
    switch (this.tok.type) {
    case acorn.tokTypes._this:
    case acorn.tokTypes._super:
      var type = this.tok.type === acorn.tokTypes._this ? "ThisExpression" : "Super";
      node = this.startNode();
      this.next();
      return this.finishNode(node, type)

    case acorn.tokTypes.name:
      var start = this.storeCurrentPos();
      var id = this.parseIdent();
      var isAsync = false;
      if (id.name === "async" && !this.canInsertSemicolon()) {
        if (this.eat(acorn.tokTypes._function)) {
          this.toks.overrideContext(acorn.tokContexts.f_expr);
          return this.parseFunction(this.startNodeAt(start), false, true)
        }
        if (this.tok.type === acorn.tokTypes.name) {
          id = this.parseIdent();
          isAsync = true;
        }
      }
      return this.eat(acorn.tokTypes.arrow) ? this.parseArrowExpression(this.startNodeAt(start), [id], isAsync) : id

    case acorn.tokTypes.regexp:
      node = this.startNode();
      var val = this.tok.value;
      node.regex = {pattern: val.pattern, flags: val.flags};
      node.value = val.value;
      node.raw = this.input.slice(this.tok.start, this.tok.end);
      this.next();
      return this.finishNode(node, "Literal")

    case acorn.tokTypes.num: case acorn.tokTypes.string:
      node = this.startNode();
      node.value = this.tok.value;
      node.raw = this.input.slice(this.tok.start, this.tok.end);
      if (this.tok.type === acorn.tokTypes.num && node.raw.charCodeAt(node.raw.length - 1) === 110) { node.bigint = node.raw.slice(0, -1).replace(/_/g, ""); }
      this.next();
      return this.finishNode(node, "Literal")

    case acorn.tokTypes._null: case acorn.tokTypes._true: case acorn.tokTypes._false:
      node = this.startNode();
      node.value = this.tok.type === acorn.tokTypes._null ? null : this.tok.type === acorn.tokTypes._true;
      node.raw = this.tok.type.keyword;
      this.next();
      return this.finishNode(node, "Literal")

    case acorn.tokTypes.parenL:
      var parenStart = this.storeCurrentPos();
      this.next();
      var inner = this.parseExpression();
      this.expect(acorn.tokTypes.parenR);
      if (this.eat(acorn.tokTypes.arrow)) {
        // (a,)=>a // SequenceExpression makes dummy in the last hole. Drop the dummy.
        var params = inner.expressions || [inner];
        if (params.length && isDummy(params[params.length - 1]))
          { params.pop(); }
        return this.parseArrowExpression(this.startNodeAt(parenStart), params)
      }
      if (this.options.preserveParens) {
        var par = this.startNodeAt(parenStart);
        par.expression = inner;
        inner = this.finishNode(par, "ParenthesizedExpression");
      }
      return inner

    case acorn.tokTypes.bracketL:
      node = this.startNode();
      node.elements = this.parseExprList(acorn.tokTypes.bracketR, true);
      return this.finishNode(node, "ArrayExpression")

    case acorn.tokTypes.braceL:
      this.toks.overrideContext(acorn.tokContexts.b_expr);
      return this.parseObj()

    case acorn.tokTypes._class:
      return this.parseClass(false)

    case acorn.tokTypes._function:
      node = this.startNode();
      this.next();
      return this.parseFunction(node, false)

    case acorn.tokTypes._new:
      return this.parseNew()

    case acorn.tokTypes.backQuote:
      return this.parseTemplate()

    case acorn.tokTypes._import:
      if (this.options.ecmaVersion >= 11) {
        return this.parseExprImport()
      } else {
        return this.dummyIdent()
      }

    default:
      return this.dummyIdent()
    }
  };

  lp.parseExprImport = function() {
    var node = this.startNode();
    var meta = this.parseIdent(true);
    switch (this.tok.type) {
    case acorn.tokTypes.parenL:
      return this.parseDynamicImport(node)
    case acorn.tokTypes.dot:
      node.meta = meta;
      return this.parseImportMeta(node)
    default:
      node.name = "import";
      return this.finishNode(node, "Identifier")
    }
  };

  lp.parseDynamicImport = function(node) {
    node.source = this.parseExprList(acorn.tokTypes.parenR)[0] || this.dummyString();
    return this.finishNode(node, "ImportExpression")
  };

  lp.parseImportMeta = function(node) {
    this.next(); // skip '.'
    node.property = this.parseIdent(true);
    return this.finishNode(node, "MetaProperty")
  };

  lp.parseNew = function() {
    var node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart;
    var meta = this.parseIdent(true);
    if (this.options.ecmaVersion >= 6 && this.eat(acorn.tokTypes.dot)) {
      node.meta = meta;
      node.property = this.parseIdent(true);
      return this.finishNode(node, "MetaProperty")
    }
    var start = this.storeCurrentPos();
    node.callee = this.parseSubscripts(this.parseExprAtom(), start, true, startIndent, line);
    if (this.tok.type === acorn.tokTypes.parenL) {
      node.arguments = this.parseExprList(acorn.tokTypes.parenR);
    } else {
      node.arguments = [];
    }
    return this.finishNode(node, "NewExpression")
  };

  lp.parseTemplateElement = function() {
    var elem = this.startNode();

    // The loose parser accepts invalid unicode escapes even in untagged templates.
    if (this.tok.type === acorn.tokTypes.invalidTemplate) {
      elem.value = {
        raw: this.tok.value,
        cooked: null
      };
    } else {
      elem.value = {
        raw: this.input.slice(this.tok.start, this.tok.end).replace(/\r\n?/g, "\n"),
        cooked: this.tok.value
      };
    }
    this.next();
    elem.tail = this.tok.type === acorn.tokTypes.backQuote;
    return this.finishNode(elem, "TemplateElement")
  };

  lp.parseTemplate = function() {
    var node = this.startNode();
    this.next();
    node.expressions = [];
    var curElt = this.parseTemplateElement();
    node.quasis = [curElt];
    while (!curElt.tail) {
      this.next();
      node.expressions.push(this.parseExpression());
      if (this.expect(acorn.tokTypes.braceR)) {
        curElt = this.parseTemplateElement();
      } else {
        curElt = this.startNode();
        curElt.value = {cooked: "", raw: ""};
        curElt.tail = true;
        this.finishNode(curElt, "TemplateElement");
      }
      node.quasis.push(curElt);
    }
    this.expect(acorn.tokTypes.backQuote);
    return this.finishNode(node, "TemplateLiteral")
  };

  lp.parseObj = function() {
    var node = this.startNode();
    node.properties = [];
    this.pushCx();
    var indent = this.curIndent + 1, line = this.curLineStart;
    this.eat(acorn.tokTypes.braceL);
    if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; }
    while (!this.closes(acorn.tokTypes.braceR, indent, line)) {
      var prop = this.startNode(), isGenerator = (void 0), isAsync = (void 0), start = (void 0);
      if (this.options.ecmaVersion >= 9 && this.eat(acorn.tokTypes.ellipsis)) {
        prop.argument = this.parseMaybeAssign();
        node.properties.push(this.finishNode(prop, "SpreadElement"));
        this.eat(acorn.tokTypes.comma);
        continue
      }
      if (this.options.ecmaVersion >= 6) {
        start = this.storeCurrentPos();
        prop.method = false;
        prop.shorthand = false;
        isGenerator = this.eat(acorn.tokTypes.star);
      }
      this.parsePropertyName(prop);
      if (this.toks.isAsyncProp(prop)) {
        isAsync = true;
        isGenerator = this.options.ecmaVersion >= 9 && this.eat(acorn.tokTypes.star);
        this.parsePropertyName(prop);
      } else {
        isAsync = false;
      }
      if (isDummy(prop.key)) { if (isDummy(this.parseMaybeAssign())) { this.next(); } this.eat(acorn.tokTypes.comma); continue }
      if (this.eat(acorn.tokTypes.colon)) {
        prop.kind = "init";
        prop.value = this.parseMaybeAssign();
      } else if (this.options.ecmaVersion >= 6 && (this.tok.type === acorn.tokTypes.parenL || this.tok.type === acorn.tokTypes.braceL)) {
        prop.kind = "init";
        prop.method = true;
        prop.value = this.parseMethod(isGenerator, isAsync);
      } else if (this.options.ecmaVersion >= 5 && prop.key.type === "Identifier" &&
                 !prop.computed && (prop.key.name === "get" || prop.key.name === "set") &&
                 (this.tok.type !== acorn.tokTypes.comma && this.tok.type !== acorn.tokTypes.braceR && this.tok.type !== acorn.tokTypes.eq)) {
        prop.kind = prop.key.name;
        this.parsePropertyName(prop);
        prop.value = this.parseMethod(false);
      } else {
        prop.kind = "init";
        if (this.options.ecmaVersion >= 6) {
          if (this.eat(acorn.tokTypes.eq)) {
            var assign = this.startNodeAt(start);
            assign.operator = "=";
            assign.left = prop.key;
            assign.right = this.parseMaybeAssign();
            prop.value = this.finishNode(assign, "AssignmentExpression");
          } else {
            prop.value = prop.key;
          }
        } else {
          prop.value = this.dummyIdent();
        }
        prop.shorthand = true;
      }
      node.properties.push(this.finishNode(prop, "Property"));
      this.eat(acorn.tokTypes.comma);
    }
    this.popCx();
    if (!this.eat(acorn.tokTypes.braceR)) {
      // If there is no closing brace, make the node span to the start
      // of the next token (this is useful for Tern)
      this.last.end = this.tok.start;
      if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
    }
    return this.finishNode(node, "ObjectExpression")
  };

  lp.parsePropertyName = function(prop) {
    if (this.options.ecmaVersion >= 6) {
      if (this.eat(acorn.tokTypes.bracketL)) {
        prop.computed = true;
        prop.key = this.parseExpression();
        this.expect(acorn.tokTypes.bracketR);
        return
      } else {
        prop.computed = false;
      }
    }
    var key = (this.tok.type === acorn.tokTypes.num || this.tok.type === acorn.tokTypes.string) ? this.parseExprAtom() : this.parseIdent();
    prop.key = key || this.dummyIdent();
  };

  lp.parsePropertyAccessor = function() {
    if (this.tok.type === acorn.tokTypes.name || this.tok.type.keyword) { return this.parseIdent() }
    if (this.tok.type === acorn.tokTypes.privateId) { return this.parsePrivateIdent() }
  };

  lp.parseIdent = function() {
    var name = this.tok.type === acorn.tokTypes.name ? this.tok.value : this.tok.type.keyword;
    if (!name) { return this.dummyIdent() }
    var node = this.startNode();
    this.next();
    node.name = name;
    return this.finishNode(node, "Identifier")
  };

  lp.parsePrivateIdent = function() {
    var node = this.startNode();
    node.name = this.tok.value;
    this.next();
    return this.finishNode(node, "PrivateIdentifier")
  };

  lp.initFunction = function(node) {
    node.id = null;
    node.params = [];
    if (this.options.ecmaVersion >= 6) {
      node.generator = false;
      node.expression = false;
    }
    if (this.options.ecmaVersion >= 8)
      { node.async = false; }
  };

  // Convert existing expression atom to assignable pattern
  // if possible.

  lp.toAssignable = function(node, binding) {
    if (!node || node.type === "Identifier" || (node.type === "MemberExpression" && !binding)) ; else if (node.type === "ParenthesizedExpression") {
      this.toAssignable(node.expression, binding);
    } else if (this.options.ecmaVersion < 6) {
      return this.dummyIdent()
    } else if (node.type === "ObjectExpression") {
      node.type = "ObjectPattern";
      for (var i = 0, list = node.properties; i < list.length; i += 1)
        {
        var prop = list[i];

        this.toAssignable(prop, binding);
      }
    } else if (node.type === "ArrayExpression") {
      node.type = "ArrayPattern";
      this.toAssignableList(node.elements, binding);
    } else if (node.type === "Property") {
      this.toAssignable(node.value, binding);
    } else if (node.type === "SpreadElement") {
      node.type = "RestElement";
      this.toAssignable(node.argument, binding);
    } else if (node.type === "AssignmentExpression") {
      node.type = "AssignmentPattern";
      delete node.operator;
    } else {
      return this.dummyIdent()
    }
    return node
  };

  lp.toAssignableList = function(exprList, binding) {
    for (var i = 0, list = exprList; i < list.length; i += 1)
      {
      var expr = list[i];

      this.toAssignable(expr, binding);
    }
    return exprList
  };

  lp.parseFunctionParams = function(params) {
    params = this.parseExprList(acorn.tokTypes.parenR);
    return this.toAssignableList(params, true)
  };

  lp.parseMethod = function(isGenerator, isAsync) {
    var node = this.startNode(), oldInAsync = this.inAsync, oldInGenerator = this.inGenerator, oldInFunction = this.inFunction;
    this.initFunction(node);
    if (this.options.ecmaVersion >= 6)
      { node.generator = !!isGenerator; }
    if (this.options.ecmaVersion >= 8)
      { node.async = !!isAsync; }
    this.inAsync = node.async;
    this.inGenerator = node.generator;
    this.inFunction = true;
    node.params = this.parseFunctionParams();
    node.body = this.parseBlock();
    this.toks.adaptDirectivePrologue(node.body.body);
    this.inAsync = oldInAsync;
    this.inGenerator = oldInGenerator;
    this.inFunction = oldInFunction;
    return this.finishNode(node, "FunctionExpression")
  };

  lp.parseArrowExpression = function(node, params, isAsync) {
    var oldInAsync = this.inAsync, oldInGenerator = this.inGenerator, oldInFunction = this.inFunction;
    this.initFunction(node);
    if (this.options.ecmaVersion >= 8)
      { node.async = !!isAsync; }
    this.inAsync = node.async;
    this.inGenerator = false;
    this.inFunction = true;
    node.params = this.toAssignableList(params, true);
    node.expression = this.tok.type !== acorn.tokTypes.braceL;
    if (node.expression) {
      node.body = this.parseMaybeAssign();
    } else {
      node.body = this.parseBlock();
      this.toks.adaptDirectivePrologue(node.body.body);
    }
    this.inAsync = oldInAsync;
    this.inGenerator = oldInGenerator;
    this.inFunction = oldInFunction;
    return this.finishNode(node, "ArrowFunctionExpression")
  };

  lp.parseExprList = function(close, allowEmpty) {
    this.pushCx();
    var indent = this.curIndent, line = this.curLineStart, elts = [];
    this.next(); // Opening bracket
    while (!this.closes(close, indent + 1, line)) {
      if (this.eat(acorn.tokTypes.comma)) {
        elts.push(allowEmpty ? null : this.dummyIdent());
        continue
      }
      var elt = this.parseMaybeAssign();
      if (isDummy(elt)) {
        if (this.closes(close, indent, line)) { break }
        this.next();
      } else {
        elts.push(elt);
      }
      this.eat(acorn.tokTypes.comma);
    }
    this.popCx();
    if (!this.eat(close)) {
      // If there is no closing brace, make the node span to the start
      // of the next token (this is useful for Tern)
      this.last.end = this.tok.start;
      if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
    }
    return elts
  };

  lp.parseAwait = function() {
    var node = this.startNode();
    this.next();
    node.argument = this.parseMaybeUnary();
    return this.finishNode(node, "AwaitExpression")
  };

  // Acorn: Loose parser

  acorn.defaultOptions.tabSize = 4;

  function parse(input, options) {
    return LooseParser.parse(input, options)
  }

  exports.LooseParser = LooseParser;
  exports.isDummy = isDummy;
  exports.parse = parse;

}));
