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File Name : statement.js

import {types as tt} from "./tokentype"
import {Parser} from "./state"
import {lineBreak, skipWhiteSpace} from "./whitespace"
import {isIdentifierStart, isIdentifierChar} from "./identifier"
import {DestructuringErrors} from "./parseutil"

const pp = Parser.prototype

// ### Statement parsing

// Parse a program. Initializes the parser, reads any number of
// statements, and wraps them in a Program node.  Optionally takes a
// `program` argument.  If present, the statements will be appended
// to its body instead of creating a new node.

pp.parseTopLevel = function(node) {
  let first = true, exports = {}
  if (!node.body) node.body = []
  while (this.type !== tt.eof) {
    let stmt = this.parseStatement(true, true, exports)
    node.body.push(stmt)
    if (first) {
      if (this.isUseStrict(stmt)) this.setStrict(true)
      first = false
    }
  }
  this.next()
  if (this.options.ecmaVersion >= 6) {
    node.sourceType = this.options.sourceType
  }
  return this.finishNode(node, "Program")
}

const loopLabel = {kind: "loop"}, switchLabel = {kind: "switch"}

pp.isLet = function() {
  if (this.type !== tt.name || this.options.ecmaVersion < 6 || this.value != "let") return false
  skipWhiteSpace.lastIndex = this.pos
  let skip = skipWhiteSpace.exec(this.input)
  let next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next)
  if (nextCh === 91 || nextCh == 123) return true // '{' and '['
  if (isIdentifierStart(nextCh, true)) {
    for (var pos = next + 1; isIdentifierChar(this.input.charCodeAt(pos), true); ++pos) {}
    let ident = this.input.slice(next, pos)
    if (!this.isKeyword(ident)) return true
  }
  return false
}

// check 'async [no LineTerminator here] function'
// - 'async /*foo*/ function' is OK.
// - 'async /*\n*/ function' is invalid.
pp.isAsyncFunction = function() {
  if (this.type !== tt.name || this.options.ecmaVersion < 8 || this.value != "async")
    return false

skipWhiteSpace.lastIndex = this.pos
  let skip = skipWhiteSpace.exec(this.input)
  let next = this.pos + skip[0].length
  return !lineBreak.test(this.input.slice(this.pos, next)) &&
    this.input.slice(next, next + 8) === "function" &&
    (next + 8 == this.input.length || !isIdentifierChar(this.input.charAt(next + 8)))
}

// Parse a single statement.
//
// If expecting a statement and finding a slash operator, parse a
// regular expression literal. This is to handle cases like
// `if (foo) /blah/.exec(foo)`, where looking at the previous token
// does not help.

pp.parseStatement = function(declaration, topLevel, exports) {
  let starttype = this.type, node = this.startNode(), kind

if (this.isLet()) {
    starttype = tt._var
    kind = "let"
  }

// Most types of statements are recognized by the keyword they
  // start with. Many are trivial to parse, some require a bit of
  // complexity.

switch (starttype) {
  case tt._break: case tt._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
  case tt._debugger: return this.parseDebuggerStatement(node)
  case tt._do: return this.parseDoStatement(node)
  case tt._for: return this.parseForStatement(node)
  case tt._function:
    if (!declaration && this.options.ecmaVersion >= 6) this.unexpected()
    return this.parseFunctionStatement(node, false)
  case tt._class:
    if (!declaration) this.unexpected()
    return this.parseClass(node, true)
  case tt._if: return this.parseIfStatement(node)
  case tt._return: return this.parseReturnStatement(node)
  case tt._switch: return this.parseSwitchStatement(node)
  case tt._throw: return this.parseThrowStatement(node)
  case tt._try: return this.parseTryStatement(node)
  case tt._const: case tt._var:
    kind = kind || this.value
    if (!declaration && kind != "var") this.unexpected()
    return this.parseVarStatement(node, kind)
  case tt._while: return this.parseWhileStatement(node)
  case tt._with: return this.parseWithStatement(node)
  case tt.braceL: return this.parseBlock()
  case tt.semi: return this.parseEmptyStatement(node)
  case tt._export:
  case tt._import:
    if (!this.options.allowImportExportEverywhere) {
      if (!topLevel)
        this.raise(this.start, "'import' and 'export' may only appear at the top level")
      if (!this.inModule)
        this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'")
    }
    return starttype === tt._import ? this.parseImport(node) : this.parseExport(node, exports)

// If the statement does not start with a statement keyword or a
    // brace, it's an ExpressionStatement or LabeledStatement. We
    // simply start parsing an expression, and afterwards, if the
    // next token is a colon and the expression was a simple
    // Identifier node, we switch to interpreting it as a label.
  default:
    if (this.isAsyncFunction() && declaration) {
      this.next()
      return this.parseFunctionStatement(node, true)
    }

let maybeName = this.value, expr = this.parseExpression()
    if (starttype === tt.name && expr.type === "Identifier" && this.eat(tt.colon))
      return this.parseLabeledStatement(node, maybeName, expr)
    else return this.parseExpressionStatement(node, expr)
  }
}

pp.parseBreakContinueStatement = function(node, keyword) {
  let isBreak = keyword == "break"
  this.next()
  if (this.eat(tt.semi) || this.insertSemicolon()) node.label = null
  else if (this.type !== tt.name) this.unexpected()
  else {
    node.label = this.parseIdent()
    this.semicolon()
  }

// Verify that there is an actual destination to break or
  // continue to.
  for (var i = 0; i < this.labels.length; ++i) {
    let lab = this.labels[i]
    if (node.label == null || lab.name === node.label.name) {
      if (lab.kind != null && (isBreak || lab.kind === "loop")) break
      if (node.label && isBreak) break
    }
  }
  if (i === this.labels.length) this.raise(node.start, "Unsyntactic " + keyword)
  return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
}

pp.parseDebuggerStatement = function(node) {
  this.next()
  this.semicolon()
  return this.finishNode(node, "DebuggerStatement")
}

pp.parseDoStatement = function(node) {
  this.next()
  this.labels.push(loopLabel)
  node.body = this.parseStatement(false)
  this.labels.pop()
  this.expect(tt._while)
  node.test = this.parseParenExpression()
  if (this.options.ecmaVersion >= 6)
    this.eat(tt.semi)
  else
    this.semicolon()
  return this.finishNode(node, "DoWhileStatement")
}

// Disambiguating between a `for` and a `for`/`in` or `for`/`of`
// loop is non-trivial. Basically, we have to parse the init `var`
// statement or expression, disallowing the `in` operator (see
// the second parameter to `parseExpression`), and then check
// whether the next token is `in` or `of`. When there is no init
// part (semicolon immediately after the opening parenthesis), it
// is a regular `for` loop.

pp.parseForStatement = function(node) {
  this.next()
  this.labels.push(loopLabel)
  this.expect(tt.parenL)
  if (this.type === tt.semi) return this.parseFor(node, null)
  let isLet = this.isLet()
  if (this.type === tt._var || this.type === tt._const || isLet) {
    let init = this.startNode(), kind = isLet ? "let" : this.value
    this.next()
    this.parseVar(init, true, kind)
    this.finishNode(init, "VariableDeclaration")
    if ((this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init.declarations.length === 1 &&
        !(kind !== "var" && init.declarations[0].init))
      return this.parseForIn(node, init)
    return this.parseFor(node, init)
  }
  let refDestructuringErrors = new DestructuringErrors
  let init = this.parseExpression(true, refDestructuringErrors)
  if (this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
    this.checkPatternErrors(refDestructuringErrors, true)
    this.toAssignable(init)
    this.checkLVal(init)
    return this.parseForIn(node, init)
  } else {
    this.checkExpressionErrors(refDestructuringErrors, true)
  }
  return this.parseFor(node, init)
}

pp.parseFunctionStatement = function(node, isAsync) {
  this.next()
  return this.parseFunction(node, true, false, isAsync)
}

pp.isFunction = function() {
  return this.type === tt._function || this.isAsyncFunction()
}

pp.parseIfStatement = function(node) {
  this.next()
  node.test = this.parseParenExpression()
  // allow function declarations in branches, but only in non-strict mode
  node.consequent = this.parseStatement(!this.strict && this.isFunction())
  node.alternate = this.eat(tt._else) ? this.parseStatement(!this.strict && this.isFunction()) : null
  return this.finishNode(node, "IfStatement")
}

pp.parseReturnStatement = function(node) {
  if (!this.inFunction && !this.options.allowReturnOutsideFunction)
    this.raise(this.start, "'return' outside of function")
  this.next()

// In `return` (and `break`/`continue`), the keywords with
  // optional arguments, we eagerly look for a semicolon or the
  // possibility to insert one.

if (this.eat(tt.semi) || this.insertSemicolon()) node.argument = null
  else { node.argument = this.parseExpression(); this.semicolon() }
  return this.finishNode(node, "ReturnStatement")
}

pp.parseSwitchStatement = function(node) {
  this.next()
  node.discriminant = this.parseParenExpression()
  node.cases = []
  this.expect(tt.braceL)
  this.labels.push(switchLabel)

// Statements under must be grouped (by label) in SwitchCase
  // nodes. `cur` is used to keep the node that we are currently
  // adding statements to.

for (var cur, sawDefault = false; this.type != tt.braceR;) {
    if (this.type === tt._case || this.type === tt._default) {
      let isCase = this.type === tt._case
      if (cur) this.finishNode(cur, "SwitchCase")
      node.cases.push(cur = this.startNode())
      cur.consequent = []
      this.next()
      if (isCase) {
        cur.test = this.parseExpression()
      } else {
        if (sawDefault) this.raiseRecoverable(this.lastTokStart, "Multiple default clauses")
        sawDefault = true
        cur.test = null
      }
      this.expect(tt.colon)
    } else {
      if (!cur) this.unexpected()
      cur.consequent.push(this.parseStatement(true))
    }
  }
  if (cur) this.finishNode(cur, "SwitchCase")
  this.next() // Closing brace
  this.labels.pop()
  return this.finishNode(node, "SwitchStatement")
}

pp.parseThrowStatement = function(node) {
  this.next()
  if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))
    this.raise(this.lastTokEnd, "Illegal newline after throw")
  node.argument = this.parseExpression()
  this.semicolon()
  return this.finishNode(node, "ThrowStatement")
}

// Reused empty array added for node fields that are always empty.

const empty = []

pp.parseTryStatement = function(node) {
  this.next()
  node.block = this.parseBlock()
  node.handler = null
  if (this.type === tt._catch) {
    let clause = this.startNode()
    this.next()
    this.expect(tt.parenL)
    clause.param = this.parseBindingAtom()
    this.checkLVal(clause.param, true)
    this.expect(tt.parenR)
    clause.body = this.parseBlock()
    node.handler = this.finishNode(clause, "CatchClause")
  }
  node.finalizer = this.eat(tt._finally) ? this.parseBlock() : null
  if (!node.handler && !node.finalizer)
    this.raise(node.start, "Missing catch or finally clause")
  return this.finishNode(node, "TryStatement")
}

pp.parseVarStatement = function(node, kind) {
  this.next()
  this.parseVar(node, false, kind)
  this.semicolon()
  return this.finishNode(node, "VariableDeclaration")
}

pp.parseWhileStatement = function(node) {
  this.next()
  node.test = this.parseParenExpression()
  this.labels.push(loopLabel)
  node.body = this.parseStatement(false)
  this.labels.pop()
  return this.finishNode(node, "WhileStatement")
}

pp.parseWithStatement = function(node) {
  if (this.strict) this.raise(this.start, "'with' in strict mode")
  this.next()
  node.object = this.parseParenExpression()
  node.body = this.parseStatement(false)
  return this.finishNode(node, "WithStatement")
}

pp.parseEmptyStatement = function(node) {
  this.next()
  return this.finishNode(node, "EmptyStatement")
}

pp.parseLabeledStatement = function(node, maybeName, expr) {
  for (let i = 0; i < this.labels.length; ++i)
    if (this.labels[i].name === maybeName) this.raise(expr.start, "Label '" + maybeName + "' is already declared")
  let kind = this.type.isLoop ? "loop" : this.type === tt._switch ? "switch" : null
  for (let i = this.labels.length - 1; i >= 0; i--) {
    let label = this.labels[i]
    if (label.statementStart == node.start) {
      label.statementStart = this.start
      label.kind = kind
    } else break
  }
  this.labels.push({name: maybeName, kind: kind, statementStart: this.start})
  node.body = this.parseStatement(true)
  this.labels.pop()
  node.label = expr
  return this.finishNode(node, "LabeledStatement")
}

pp.parseExpressionStatement = function(node, expr) {
  node.expression = expr
  this.semicolon()
  return this.finishNode(node, "ExpressionStatement")
}

// Parse a semicolon-enclosed block of statements, handling `"use
// strict"` declarations when `allowStrict` is true (used for
// function bodies).

pp.parseBlock = function(allowStrict) {
  let node = this.startNode(), first = true, oldStrict
  node.body = []
  this.expect(tt.braceL)
  while (!this.eat(tt.braceR)) {
    let stmt = this.parseStatement(true)
    node.body.push(stmt)
    if (first && allowStrict && this.isUseStrict(stmt)) {
      oldStrict = this.strict
      this.setStrict(this.strict = true)
    }
    first = false
  }
  if (oldStrict === false) this.setStrict(false)
  return this.finishNode(node, "BlockStatement")
}

// Parse a regular `for` loop. The disambiguation code in
// `parseStatement` will already have parsed the init statement or
// expression.

pp.parseFor = function(node, init) {
  node.init = init
  this.expect(tt.semi)
  node.test = this.type === tt.semi ? null : this.parseExpression()
  this.expect(tt.semi)
  node.update = this.type === tt.parenR ? null : this.parseExpression()
  this.expect(tt.parenR)
  node.body = this.parseStatement(false)
  this.labels.pop()
  return this.finishNode(node, "ForStatement")
}

// Parse a `for`/`in` and `for`/`of` loop, which are almost
// same from parser's perspective.

pp.parseForIn = function(node, init) {
  let type = this.type === tt._in ? "ForInStatement" : "ForOfStatement"
  this.next()
  node.left = init
  node.right = this.parseExpression()
  this.expect(tt.parenR)
  node.body = this.parseStatement(false)
  this.labels.pop()
  return this.finishNode(node, type)
}

// Parse a list of variable declarations.

pp.parseVar = function(node, isFor, kind) {
  node.declarations = []
  node.kind = kind
  for (;;) {
    let decl = this.startNode()
    this.parseVarId(decl)
    if (this.eat(tt.eq)) {
      decl.init = this.parseMaybeAssign(isFor)
    } else if (kind === "const" && !(this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of")))) {
      this.unexpected()
    } else if (decl.id.type != "Identifier" && !(isFor && (this.type === tt._in || this.isContextual("of")))) {
      this.raise(this.lastTokEnd, "Complex binding patterns require an initialization value")
    } else {
      decl.init = null
    }
    node.declarations.push(this.finishNode(decl, "VariableDeclarator"))
    if (!this.eat(tt.comma)) break
  }
  return node
}

pp.parseVarId = function(decl) {
  decl.id = this.parseBindingAtom()
  this.checkLVal(decl.id, true)
}

// Parse a function declaration or literal (depending on the
// `isStatement` parameter).

pp.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) {
  this.initFunction(node)
  if (this.options.ecmaVersion >= 6 && !isAsync)
    node.generator = this.eat(tt.star)
  if (this.options.ecmaVersion >= 8)
    node.async = !!isAsync

if (isStatement)
    node.id = this.parseIdent()

let oldInGen = this.inGenerator, oldInAsync = this.inAsync, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos
  this.inGenerator = node.generator
  this.inAsync = node.async
  this.yieldPos = 0
  this.awaitPos = 0

if (!isStatement && this.type === tt.name)
    node.id = this.parseIdent()
  this.parseFunctionParams(node)
  this.parseFunctionBody(node, allowExpressionBody)

this.inGenerator = oldInGen
  this.inAsync = oldInAsync
  this.yieldPos = oldYieldPos
  this.awaitPos = oldAwaitPos
  return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
}

pp.parseFunctionParams = function(node) {
  this.expect(tt.parenL)
  node.params = this.parseBindingList(tt.parenR, false, this.options.ecmaVersion >= 8, true)
  this.checkYieldAwaitInDefaultParams()
}

// Parse a class declaration or literal (depending on the
// `isStatement` parameter).

pp.parseClass = function(node, isStatement) {
  this.next()
  this.parseClassId(node, isStatement)
  this.parseClassSuper(node)
  let classBody = this.startNode()
  let hadConstructor = false
  classBody.body = []
  this.expect(tt.braceL)
  while (!this.eat(tt.braceR)) {
    if (this.eat(tt.semi)) continue
    let method = this.startNode()
    let isGenerator = this.eat(tt.star)
    let isAsync = false
    let isMaybeStatic = this.type === tt.name && this.value === "static"
    this.parsePropertyName(method)
    method.static = isMaybeStatic && this.type !== tt.parenL
    if (method.static) {
      if (isGenerator) this.unexpected()
      isGenerator = this.eat(tt.star)
      this.parsePropertyName(method)
    }
    if (this.options.ecmaVersion >= 8 && !isGenerator && !method.computed &&
        method.key.type === "Identifier" && method.key.name === "async" && this.type !== tt.parenL &&
        !this.canInsertSemicolon()) {
      isAsync = true
      this.parsePropertyName(method)
    }
    method.kind = "method"
    let isGetSet = false
    if (!method.computed) {
      let {key} = method
      if (!isGenerator && !isAsync && key.type === "Identifier" && this.type !== tt.parenL && (key.name === "get" || key.name === "set")) {
        isGetSet = true
        method.kind = key.name
        key = this.parsePropertyName(method)
      }
      if (!method.static && (key.type === "Identifier" && key.name === "constructor" ||
          key.type === "Literal" && key.value === "constructor")) {
        if (hadConstructor) this.raise(key.start, "Duplicate constructor in the same class")
        if (isGetSet) this.raise(key.start, "Constructor can't have get/set modifier")
        if (isGenerator) this.raise(key.start, "Constructor can't be a generator")
        if (isAsync) this.raise(key.start, "Constructor can't be an async method")
        method.kind = "constructor"
        hadConstructor = true
      }
    }
    this.parseClassMethod(classBody, method, isGenerator, isAsync)
    if (isGetSet) {
      let paramCount = method.kind === "get" ? 0 : 1
      if (method.value.params.length !== paramCount) {
        let start = method.value.start
        if (method.kind === "get")
          this.raiseRecoverable(start, "getter should have no params")
        else
          this.raiseRecoverable(start, "setter should have exactly one param")
      } else {
        if (method.kind === "set" && method.value.params[0].type === "RestElement")
          this.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params")
      }
    }
  }
  node.body = this.finishNode(classBody, "ClassBody")
  return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
}

pp.parseClassMethod = function(classBody, method, isGenerator, isAsync) {
  method.value = this.parseMethod(isGenerator, isAsync)
  classBody.body.push(this.finishNode(method, "MethodDefinition"))
}

pp.parseClassId = function(node, isStatement) {
  node.id = this.type === tt.name ? this.parseIdent() : isStatement ? this.unexpected() : null
}

pp.parseClassSuper = function(node) {
  node.superClass = this.eat(tt._extends) ? this.parseExprSubscripts() : null
}

// Parses module export declaration.

pp.parseExport = function(node, exports) {
  this.next()
  // export * from '...'
  if (this.eat(tt.star)) {
    this.expectContextual("from")
    node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
    this.semicolon()
    return this.finishNode(node, "ExportAllDeclaration")
  }
  if (this.eat(tt._default)) { // export default ...
    this.checkExport(exports, "default", this.lastTokStart)
    let parens = this.type == tt.parenL
    let expr = this.parseMaybeAssign()
    let needsSemi = true
    if (!parens && (expr.type == "FunctionExpression" ||
                    expr.type == "ClassExpression")) {
      needsSemi = false
      if (expr.id) {
        expr.type = expr.type == "FunctionExpression"
          ? "FunctionDeclaration"
          : "ClassDeclaration"
      }
    }
    node.declaration = expr
    if (needsSemi) this.semicolon()
    return this.finishNode(node, "ExportDefaultDeclaration")
  }
  // export var|const|let|function|class ...
  if (this.shouldParseExportStatement()) {
    node.declaration = this.parseStatement(true)
    if (node.declaration.type === "VariableDeclaration")
      this.checkVariableExport(exports, node.declaration.declarations)
    else
      this.checkExport(exports, node.declaration.id.name, node.declaration.id.start)
    node.specifiers = []
    node.source = null
  } else { // export { x, y as z } [from '...']
    node.declaration = null
    node.specifiers = this.parseExportSpecifiers(exports)
    if (this.eatContextual("from")) {
      node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
    } else {
      // check for keywords used as local names
      for (let i = 0; i < node.specifiers.length; i++) {
        if (this.keywords.test(node.specifiers[i].local.name) || this.reservedWords.test(node.specifiers[i].local.name)) {
          this.unexpected(node.specifiers[i].local.start)
        }
      }

node.source = null
    }
    this.semicolon()
  }
  return this.finishNode(node, "ExportNamedDeclaration")
}

pp.checkExport = function(exports, name, pos) {
  if (!exports) return
  if (Object.prototype.hasOwnProperty.call(exports, name))
    this.raiseRecoverable(pos, "Duplicate export '" + name + "'")
  exports[name] = true
}

pp.checkPatternExport = function(exports, pat) {
  let type = pat.type
  if (type == "Identifier")
    this.checkExport(exports, pat.name, pat.start)
  else if (type == "ObjectPattern")
    for (let i = 0; i < pat.properties.length; ++i)
      this.checkPatternExport(exports, pat.properties[i].value)
  else if (type == "ArrayPattern")
    for (let i = 0; i < pat.elements.length; ++i) {
      let elt = pat.elements[i]
      if (elt) this.checkPatternExport(exports, elt)
    }
  else if (type == "AssignmentPattern")
    this.checkPatternExport(exports, pat.left)
  else if (type == "ParenthesizedExpression")
    this.checkPatternExport(exports, pat.expression)
}

pp.checkVariableExport = function(exports, decls) {
  if (!exports) return
  for (let i = 0; i < decls.length; i++)
    this.checkPatternExport(exports, decls[i].id)
}

pp.shouldParseExportStatement = function() {
  return this.type.keyword === "var"
    || this.type.keyword === "const"
    || this.type.keyword === "class"
    || this.type.keyword === "function"
    || this.isLet()
    || this.isAsyncFunction()
}

// Parses a comma-separated list of module exports.

pp.parseExportSpecifiers = function(exports) {
  let nodes = [], first = true
  // export { x, y as z } [from '...']
  this.expect(tt.braceL)
  while (!this.eat(tt.braceR)) {
    if (!first) {
      this.expect(tt.comma)
      if (this.afterTrailingComma(tt.braceR)) break
    } else first = false

let node = this.startNode()
    node.local = this.parseIdent(this.type === tt._default)
    node.exported = this.eatContextual("as") ? this.parseIdent(true) : node.local
    this.checkExport(exports, node.exported.name, node.exported.start)
    nodes.push(this.finishNode(node, "ExportSpecifier"))
  }
  return nodes
}

// Parses import declaration.

pp.parseImport = function(node) {
  this.next()
  // import '...'
  if (this.type === tt.string) {
    node.specifiers = empty
    node.source = this.parseExprAtom()
  } else {
    node.specifiers = this.parseImportSpecifiers()
    this.expectContextual("from")
    node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
  }
  this.semicolon()
  return this.finishNode(node, "ImportDeclaration")
}

// Parses a comma-separated list of module imports.

pp.parseImportSpecifiers = function() {
  let nodes = [], first = true
  if (this.type === tt.name) {
    // import defaultObj, { x, y as z } from '...'
    let node = this.startNode()
    node.local = this.parseIdent()
    this.checkLVal(node.local, true)
    nodes.push(this.finishNode(node, "ImportDefaultSpecifier"))
    if (!this.eat(tt.comma)) return nodes
  }
  if (this.type === tt.star) {
    let node = this.startNode()
    this.next()
    this.expectContextual("as")
    node.local = this.parseIdent()
    this.checkLVal(node.local, true)
    nodes.push(this.finishNode(node, "ImportNamespaceSpecifier"))
    return nodes
  }
  this.expect(tt.braceL)
  while (!this.eat(tt.braceR)) {
    if (!first) {
      this.expect(tt.comma)
      if (this.afterTrailingComma(tt.braceR)) break
    } else first = false

let node = this.startNode()
    node.imported = this.parseIdent(true)
    if (this.eatContextual("as")) {
      node.local = this.parseIdent()
    } else {
      node.local = node.imported
      if (this.isKeyword(node.local.name)) this.unexpected(node.local.start)
      if (this.reservedWordsStrict.test(node.local.name)) this.raiseRecoverable(node.local.start, "The keyword '" + node.local.name + "' is reserved")
    }
    this.checkLVal(node.local, true)
    nodes.push(this.finishNode(node, "ImportSpecifier"))
  }
  return nodes
}

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Name	Type	Size	Permission	Last Modified	Actions
.	dir	-	0755	2021-11-10 09:12:39	Buat Folder Buat File Info
..	dir	-	0755	2021-11-10 09:12:39
bin	dir	-	0755	2021-11-10 09:12:39	rename chmod hapus
loose	dir	-	0755	2021-11-10 09:12:39	rename chmod hapus
walk	dir	-	0755	2021-11-10 09:12:39	rename chmod hapus
expression.js	text/plain	28.88 KB	0644	2016-09-15 03:51:47	edit rename chmod hapus
identifier.js	text/plain	11.24 KB	0644	2016-09-15 03:47:06	edit rename chmod hapus
index.js	text/x-pascal	2.49 KB	0644	2016-12-19 03:29:25	edit rename chmod hapus
location.js	text/plain	787 B	0644	2016-09-08 08:45:30	edit rename chmod hapus
locutil.js	text/x-pascal	1.03 KB	0644	2016-09-08 08:45:30	edit rename chmod hapus
lval.js	text/plain	6.25 KB	0644	2016-09-11 09:23:45	edit rename chmod hapus
node.js	text/plain	1.17 KB	0644	2016-09-08 08:45:30	edit rename chmod hapus
options.js	text/plain	5.12 KB	0644	2016-09-08 08:47:08	edit rename chmod hapus
parseutil.js	text/plain	3.26 KB	0644	2016-09-11 09:23:45	edit rename chmod hapus
state.js	text/plain	3.73 KB	0644	2016-09-15 03:48:46	edit rename chmod hapus
statement.js	text/plain	25.36 KB	0644	2016-11-29 11:19:25	edit rename chmod hapus
tokencontext.js	text/plain	3.16 KB	0644	2016-09-08 08:45:30	edit rename chmod hapus
tokenize.js	text/plain	22.56 KB	0644	2016-09-11 09:14:59	edit rename chmod hapus
tokentype.js	text/plain	5.26 KB	0644	2016-09-08 08:45:30	edit rename chmod hapus
util.js	text/plain	240 B	0644	2016-09-08 08:45:30	edit rename chmod hapus
whitespace.js	text/plain	476 B	0644	2016-09-08 08:45:30	edit rename chmod hapus