'use strict'; 
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var getBuiltIn = require('../internals/get-built-in'); 
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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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    if (method === undefined) return method; 
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    return function () { 
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      var O = this; 
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      var Promise = getBuiltIn('Promise'); 
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      return new Promise(function (resolve) { 
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        call(method, O); 
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        resolve(undefined); 
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      }); 
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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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