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// PR c++/53581
template<class A, int M, int N>
class Child;
template<class A, int M, int N>
class Base
{
public:
Child<A, M, N> operator-(const Base<A, M, N> &m) const
{
Child<A, M, N> diff;
return diff;
}
A test() const
{
return 0;
}
private:
A values[M * N];
};
template<class A, int N>
class Ops
{
public:
virtual ~Ops() {}
bool bar() const
{
Child<A, N, N> mat;
return (*static_cast<const Child<A, N, N>*>(this) - mat).test();
}
};
template<class A, int N>
class Child<A, N, N> : public Base<A, N, N>, public Ops<A, N> {};
class ImageWarp
{
bool bar() const
{
return foo.bar();
}
Child<float, 3, 3> foo;
};
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