.config/coc/extensions/node_modules/coc-prettier/node_modules/core-js/internals/async-iterator-create-proxy.js

   1 'use strict';
   2 var path = require('../internals/path');
   3 var aFunction = require('../internals/a-function');
   4 var anObject = require('../internals/an-object');
   5 var create = require('../internals/object-create');
   6 var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
   7 var redefineAll = require('../internals/redefine-all');
   8 var wellKnownSymbol = require('../internals/well-known-symbol');
   9 var InternalStateModule = require('../internals/internal-state');
  10 var getBuiltIn = require('../internals/get-built-in');
  11
  12 var Promise = getBuiltIn('Promise');
  13
  14 var setInternalState = InternalStateModule.set;
  15 var getInternalState = InternalStateModule.get;
  16
  17 var TO_STRING_TAG = wellKnownSymbol('toStringTag');
  18
  19 var $return = function (value) {
  20   var iterator = getInternalState(this).iterator;
  21   var $$return = iterator['return'];
  22   return $$return === undefined
  23     ? Promise.resolve({ done: true, value: value })
  24     : anObject($$return.call(iterator, value));
  25 };
  26
  27 var $throw = function (value) {
  28   var iterator = getInternalState(this).iterator;
  29   var $$throw = iterator['throw'];
  30   return $$throw === undefined
  31     ? Promise.reject(value)
  32     : $$throw.call(iterator, value);
  33 };
  34
  35 module.exports = function (nextHandler, IS_ITERATOR) {
  36   var AsyncIteratorProxy = function AsyncIterator(state) {
  37     state.next = aFunction(state.iterator.next);
  38     state.done = false;
  39     setInternalState(this, state);
  40   };
  41
  42   AsyncIteratorProxy.prototype = redefineAll(create(path.AsyncIterator.prototype), {
  43     next: function next(arg) {
  44       var state = getInternalState(this);
  45       if (state.done) return Promise.resolve({ done: true, value: undefined });
  46       try {
  47         return Promise.resolve(anObject(nextHandler.call(state, arg, Promise)));
  48       } catch (error) {
  49         return Promise.reject(error);
  50       }
  51     },
  52     'return': $return,
  53     'throw': $throw
  54   });
  55
  56   if (!IS_ITERATOR) {
  57     createNonEnumerableProperty(AsyncIteratorProxy.prototype, TO_STRING_TAG, 'Generator');
  58   }
  59
  60   return AsyncIteratorProxy;
  61 };