29 lines
634 B
TypeScript
29 lines
634 B
TypeScript
export function prop(object: {}, name: string, f: () => any): void {
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Object.defineProperty(object, name, {
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configurable: true,
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enumerable: true,
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get(): any {
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const _value = f.call(this);
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this[name] = _value;
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return _value;
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},
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set(_value: any): void {
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Object.defineProperty(this, name, {
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configurable: true,
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enumerable: true,
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value: _value,
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writable: true,
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});
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},
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});
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}
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export function value<T>(f: () => T): () => T {
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let _value: T;
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return (): T => {
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if (_value !== undefined) return _value;
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_value = f();
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return _value;
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};
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}
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