// @strict: true
// @exactOptionalPropertyTypes: true

export interface IBase {
	_brand: any;
}

export interface IDerivedA extends IBase {
	propertyA?: boolean;
}

export interface IDerivedB extends IBase {
	propertyB?: string;
}

export type IAllOptions = IBase &
	IDerivedA &
	IDerivedB;

export function cloneOptions(
	src: IAllOptions,
	dest = emptyOptions<IAllOptions>(),
) {
	(Object.keys(src) as (keyof IAllOptions)[]).forEach(p => {
		if (typeof src[p] !== "object") {
			dest[p] = src[p];
		}
	});

	return dest;
}

function emptyOptions<T extends IAllOptions>(): T {
	return { _brand: void 0 } as T;
}