56 lines
2.1 KiB
JavaScript
56 lines
2.1 KiB
JavaScript
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'use strict';
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var call = require('../internals/function-call');
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var uncurryThis = require('../internals/function-uncurry-this');
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var bind = require('../internals/function-bind-context');
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var anObject = require('../internals/an-object');
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var aCallable = require('../internals/a-callable');
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var isNullOrUndefined = require('../internals/is-null-or-undefined');
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var getMethod = require('../internals/get-method');
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var wellKnownSymbol = require('../internals/well-known-symbol');
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var ASYNC_DISPOSE = wellKnownSymbol('asyncDispose');
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var DISPOSE = wellKnownSymbol('dispose');
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var push = uncurryThis([].push);
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// `GetDisposeMethod` abstract operation
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// https://tc39.es/proposal-explicit-resource-management/#sec-getdisposemethod
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var getDisposeMethod = function (V, hint) {
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if (hint === 'async-dispose') {
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var method = getMethod(V, ASYNC_DISPOSE);
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if (method !== undefined) return method;
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method = getMethod(V, DISPOSE);
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return function () {
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call(method, this);
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};
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} return getMethod(V, DISPOSE);
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};
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// `CreateDisposableResource` abstract operation
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// https://tc39.es/proposal-explicit-resource-management/#sec-createdisposableresource
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var createDisposableResource = function (V, hint, method) {
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if (arguments.length < 3 && !isNullOrUndefined(V)) {
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method = aCallable(getDisposeMethod(anObject(V), hint));
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}
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return method === undefined ? function () {
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return undefined;
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} : bind(method, V);
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};
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// `AddDisposableResource` abstract operation
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// https://tc39.es/proposal-explicit-resource-management/#sec-adddisposableresource
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module.exports = function (disposable, V, hint, method) {
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var resource;
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if (arguments.length < 4) {
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// When `V`` is either `null` or `undefined` and hint is `async-dispose`,
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// we record that the resource was evaluated to ensure we will still perform an `Await` when resources are later disposed.
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if (isNullOrUndefined(V) && hint === 'sync-dispose') return;
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resource = createDisposableResource(V, hint);
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} else {
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resource = createDisposableResource(undefined, hint, method);
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}
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push(disposable.stack, resource);
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};
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