src/vs/base/common/functional.ts

32 LOC · 27 covered · 5 uncovered · 7 ranges · 20961 concepts · 4 introducers · 12741 tests

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  /*---------------------------------------------------------------------------------------------
  
map.ts ×97

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   *  Copyright (c) Microsoft Corporation. All rights reserved.
  
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   *  Licensed under the MIT License. See License.txt in the project root for license information.
  
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   *--------------------------------------------------------------------------------------------*/
  
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  /**
  
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   * Given a function, returns a function that is only calling that function once.
  
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   */
  
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  export function createSingleCallFunction<T extends Function>(this: unknown, fn: T, fnDidRunCallback?: () => void): T {
  
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  	const _this = this;
  
functional.ts ×2

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  	let didCall = false;
  
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  	let result: unknown;
  
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  	return function () {
  
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  		if (didCall) {
  
functional.ts ×3

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  			return result;
  
crypto.ts ×3

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  		}
  
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functional.ts ×3

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  		didCall = true;
  
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  		if (fnDidRunCallback) {
  
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  			try {
  
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  				result = fn.apply(_this, arguments);
  
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  			} finally {
  
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  				fnDidRunCallback();
  
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  			}
  
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  		} else {
  
functional.ts ×3

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  			result = fn.apply(_this, arguments);
  
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  		}
  
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  		return result;
  
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  	} as unknown as T;
  
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  }
  
functional.ts ×2