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

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+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+var LazyValueState;
+(function (LazyValueState) {
+    LazyValueState[LazyValueState["Uninitialized"] = 0] = "Uninitialized";
+    LazyValueState[LazyValueState["Running"] = 1] = "Running";
+    LazyValueState[LazyValueState["Completed"] = 2] = "Completed";
+})(LazyValueState || (LazyValueState = {}));
+export class Lazy {
+    constructor(executor) {
+        this.executor = executor;
+        this._state = LazyValueState.Uninitialized;
+    }
+    /**
+     * Get the wrapped value.
+     *
+     * This will force evaluation of the lazy value if it has not been resolved yet. Lazy values are only
+     * resolved once. `getValue` will re-throw exceptions that are hit while resolving the value
+     */
+    get value() {
+        if (this._state === LazyValueState.Uninitialized) {
+            this._state = LazyValueState.Running;
+            try {
+                this._value = this.executor();
+            }
+            catch (err) {
+                this._error = err;
+            }
+            finally {
+                this._state = LazyValueState.Completed;
+            }
+        }
+        else if (this._state === LazyValueState.Running) {
+            throw new Error('Cannot read the value of a lazy that is being initialized');
+        }
+        if (this._error) {
+            throw this._error;
+        }
+        return this._value;
+    }
+    /**
+     * Get the wrapped value without forcing evaluation.
+     */
+    get rawValue() { return this._value; }
+}
+//# sourceMappingURL=lazy.js.map