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// Origin: PR c++/43206
// { dg-do compile }
template<class A> struct NumericTraits{ typedef A TInputImage;};
template<class B> class CovariantVector{};
template<class C> struct Image{ typedef C PixelType;};
template<class H, class E, class D>
class F {
typedef H G;
typedef
typename NumericTraits<typename G::PixelType>::RealType
InputRealType;
};
template<typename TInputImage,
typename TOutputImage=Image<CovariantVector<typename NumericTraits<typename TInputImage::PixelType>::TInputImage> > >
class XXX{};
XXX<Image<float> > x;
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