... and define it this way:

• template<class T> ArraySeq<T>::ArraySeq
  (const T* p0, int n0):
  p(p0), n(n0) { }

• template<class T>
  bool ArraySeq<T>::valid() {
  return n > 0;
  }

• template<class T> T ArraySeq<T>::next()
  {
  --n; return *p++;
  }

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