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rOACCT/node_modules/core-js/modules/esnext.async-disposable-stack.constructor.js
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esnext.async-disposable-stack.constructor.js
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			'use strict';
			// https://github.com/tc39/proposal-async-explicit-resource-management
			var $ = require('../internals/export');
			var DESCRIPTORS = require('../internals/descriptors');
			var getBuiltIn = require('../internals/get-built-in');
			var aCallable = require('../internals/a-callable');
			var anObject = require('../internals/an-object');
			var anInstance = require('../internals/an-instance');
			var isNullOrUndefined = require('../internals/is-null-or-undefined');
			var defineBuiltIn = require('../internals/define-built-in');
			var defineBuiltIns = require('../internals/define-built-ins');
			var defineBuiltInAccessor = require('../internals/define-built-in-accessor');
			var wellKnownSymbol = require('../internals/well-known-symbol');
			var InternalStateModule = require('../internals/internal-state');
			var DisposableStackHelpers = require('../internals/disposable-stack-helpers');

			var Promise = getBuiltIn('Promise');
			var SuppressedError = getBuiltIn('SuppressedError');
			var $ReferenceError = ReferenceError;

			var ASYNC_DISPOSE = wellKnownSymbol('asyncDispose');
			var TO_STRING_TAG = wellKnownSymbol('toStringTag');

			var getDisposeMethod = DisposableStackHelpers.getDisposeMethod;
			var addDisposableResource = DisposableStackHelpers.addDisposableResource;

			var ASYNC_DISPOSABLE_STACK = 'AsyncDisposableStack';
			var setInternalState = InternalStateModule.set;
			var getAsyncDisposableStackInternalState = InternalStateModule.getterFor(ASYNC_DISPOSABLE_STACK);

			var HINT = 'async-dispose';
			var DISPOSED = 'disposed';
			var PENDING = 'pending';

			var ALREADY_DISPOSED = ASYNC_DISPOSABLE_STACK + ' already disposed';

			var $AsyncDisposableStack = function AsyncDisposableStack() {
			setInternalState(anInstance(this, AsyncDisposableStackPrototype), {
			type: ASYNC_DISPOSABLE_STACK,
			state: PENDING,
			stack: []
			});

			if (!DESCRIPTORS) this.disposed = false;
			};

			var AsyncDisposableStackPrototype = $AsyncDisposableStack.prototype;

			defineBuiltIns(AsyncDisposableStackPrototype, {
			disposeAsync: function disposeAsync() {
			var asyncDisposableStack = this;
			return new Promise(function (resolve, reject) {
			var internalState = getAsyncDisposableStackInternalState(asyncDisposableStack);
			if (internalState.state == DISPOSED) return resolve(undefined);
			internalState.state = DISPOSED;
			if (!DESCRIPTORS) asyncDisposableStack.disposed = true;
			var stack = internalState.stack;
			var i = stack.length;
			var thrown = false;
			var suppressed;

			var handleError = function (result) {
			if (thrown) {
			suppressed = new SuppressedError(result, suppressed);
			} else {
			thrown = true;
			suppressed = result;
			}

			loop();
			};

			var loop = function () {
			if (i) {
			var disposeMethod = stack[--i];
			stack[i] = null;
			try {
			Promise.resolve(disposeMethod()).then(loop, handleError);
			} catch (error) {
			handleError(error);
			}
			} else {
			internalState.stack = null;
			thrown ? reject(suppressed) : resolve(undefined);
			}
			};

			loop();
			});
			},
			use: function use(value) {
			var internalState = getAsyncDisposableStackInternalState(this);
			if (internalState.state == DISPOSED) throw $ReferenceError(ALREADY_DISPOSED);
			if (!isNullOrUndefined(value)) {
			anObject(value);
			var method = aCallable(getDisposeMethod(value, HINT));
			addDisposableResource(internalState, value, HINT, method);
			} return value;
			},
			adopt: function adopt(value, onDispose) {
			var internalState = getAsyncDisposableStackInternalState(this);
			if (internalState.state == DISPOSED) throw $ReferenceError(ALREADY_DISPOSED);
			aCallable(onDispose);
			addDisposableResource(internalState, undefined, HINT, function () {
			onDispose(value);
			});
			return value;
			},
			defer: function defer(onDispose) {
			var internalState = getAsyncDisposableStackInternalState(this);
			if (internalState.state == DISPOSED) throw $ReferenceError(ALREADY_DISPOSED);
			aCallable(onDispose);
			addDisposableResource(internalState, undefined, HINT, onDispose);
			},
			move: function move() {
			var internalState = getAsyncDisposableStackInternalState(this);
			if (internalState.state == DISPOSED) throw $ReferenceError(ALREADY_DISPOSED);
			var newAsyncDisposableStack = new $AsyncDisposableStack();
			getAsyncDisposableStackInternalState(newAsyncDisposableStack).stack = internalState.stack;
			internalState.stack = [];
			return newAsyncDisposableStack;
			}
			});

			if (DESCRIPTORS) defineBuiltInAccessor(AsyncDisposableStackPrototype, 'disposed', {
			configurable: true,
			get: function disposed() {
			return getAsyncDisposableStackInternalState(this).state == DISPOSED;
			}
			});

			defineBuiltIn(AsyncDisposableStackPrototype, ASYNC_DISPOSE, AsyncDisposableStackPrototype.disposeAsync, { name: 'disposeAsync' });
			defineBuiltIn(AsyncDisposableStackPrototype, TO_STRING_TAG, ASYNC_DISPOSABLE_STACK, { nonWritable: true });

			$({ global: true, constructor: true, forced: true }, {
			AsyncDisposableStack: $AsyncDisposableStack
			});