[d24f17c] | 1 | 'use strict';
|
---|
| 2 | var call = require('../internals/function-call');
|
---|
| 3 | var uncurryThis = require('../internals/function-uncurry-this');
|
---|
| 4 | var bind = require('../internals/function-bind-context');
|
---|
| 5 | var anObject = require('../internals/an-object');
|
---|
| 6 | var aCallable = require('../internals/a-callable');
|
---|
| 7 | var isNullOrUndefined = require('../internals/is-null-or-undefined');
|
---|
| 8 | var getMethod = require('../internals/get-method');
|
---|
| 9 | var wellKnownSymbol = require('../internals/well-known-symbol');
|
---|
| 10 |
|
---|
| 11 | var ASYNC_DISPOSE = wellKnownSymbol('asyncDispose');
|
---|
| 12 | var DISPOSE = wellKnownSymbol('dispose');
|
---|
| 13 |
|
---|
| 14 | var push = uncurryThis([].push);
|
---|
| 15 |
|
---|
| 16 | // `GetDisposeMethod` abstract operation
|
---|
| 17 | // https://tc39.es/proposal-explicit-resource-management/#sec-getdisposemethod
|
---|
| 18 | var getDisposeMethod = function (V, hint) {
|
---|
| 19 | if (hint === 'async-dispose') {
|
---|
| 20 | var method = getMethod(V, ASYNC_DISPOSE);
|
---|
| 21 | if (method !== undefined) return method;
|
---|
| 22 | method = getMethod(V, DISPOSE);
|
---|
| 23 | return function () {
|
---|
| 24 | call(method, this);
|
---|
| 25 | };
|
---|
| 26 | } return getMethod(V, DISPOSE);
|
---|
| 27 | };
|
---|
| 28 |
|
---|
| 29 | // `CreateDisposableResource` abstract operation
|
---|
| 30 | // https://tc39.es/proposal-explicit-resource-management/#sec-createdisposableresource
|
---|
| 31 | var createDisposableResource = function (V, hint, method) {
|
---|
| 32 | if (arguments.length < 3 && !isNullOrUndefined(V)) {
|
---|
| 33 | method = aCallable(getDisposeMethod(anObject(V), hint));
|
---|
| 34 | }
|
---|
| 35 |
|
---|
| 36 | return method === undefined ? function () {
|
---|
| 37 | return undefined;
|
---|
| 38 | } : bind(method, V);
|
---|
| 39 | };
|
---|
| 40 |
|
---|
| 41 | // `AddDisposableResource` abstract operation
|
---|
| 42 | // https://tc39.es/proposal-explicit-resource-management/#sec-adddisposableresource
|
---|
| 43 | module.exports = function (disposable, V, hint, method) {
|
---|
| 44 | var resource;
|
---|
| 45 | if (arguments.length < 4) {
|
---|
| 46 | // When `V`` is either `null` or `undefined` and hint is `async-dispose`,
|
---|
| 47 | // we record that the resource was evaluated to ensure we will still perform an `Await` when resources are later disposed.
|
---|
| 48 | if (isNullOrUndefined(V) && hint === 'sync-dispose') return;
|
---|
| 49 | resource = createDisposableResource(V, hint);
|
---|
| 50 | } else {
|
---|
| 51 | resource = createDisposableResource(undefined, hint, method);
|
---|
| 52 | }
|
---|
| 53 |
|
---|
| 54 | push(disposable.stack, resource);
|
---|
| 55 | };
|
---|