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_internal/editor/esm/vs/base/common/functional.js

@@ -0,0 +1,31 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+/**
+ * Given a function, returns a function that is only calling that function once.
+ */
+export function createSingleCallFunction(fn, fnDidRunCallback) {
+    const _this = this;
+    let didCall = false;
+    let result;
+    return function () {
+        if (didCall) {
+            return result;
+        }
+        didCall = true;
+        if (fnDidRunCallback) {
+            try {
+                result = fn.apply(_this, arguments);
+            }
+            finally {
+                fnDidRunCallback();
+            }
+        }
+        else {
+            result = fn.apply(_this, arguments);
+        }
+        return result;
+    };
+}
+//# sourceMappingURL=functional.js.map