小编Pol*_*lem的帖子

我有一个通用的IDetachable接口,它提供了一种方法:

template<class T>
class IDetachable {
public:
  virtual T detached() const = 0;
};

我有这些示例类:

class A: public IDetachable<A> {
  virtual A detached() const override {
    // some implementation which returns a detached A object
  }
};

继承B时会出现问题:

class B: public A, public IDetachable<B> {
  virtual B detached() const override {
    // some implementation which returns a detached B object
  }
};

clang ++告诉我:

error: virtual function 'detached' has a different return type ('B')
  than the function it overrides (which …