流不允许我将具有更多属性的泛型传递给需要更少属性的子级

interface Base {
    baseProp: string;
}

interface Extended extends Base {
    extraProp: number;
}

function processBase(base: Base) {
    console.log(base.baseProp);
}

const extended: Extended = { baseProp: 'base', extraProp: 123 };
processBase(extended as Base); // 使用类型断言

function processGeneric<T extends Base>(item: T) {
    console.log(item.baseProp);
}

const extended: Extended = { baseProp: 'base', extraProp: 123 };
processGeneric(extended); // 正确，因为Extended满足Base的约束

type PartialExtended = Pick<Extended, 'baseProp'>;

function processPartial(partial: PartialExtended) {
    console.log(partial.baseProp);
}

const partialExtended: PartialExtended = { baseProp: 'base' };
processPartial(partialExtended);