Template specialization works with int and fails with double as a class

Question

I hava a following simple template:

template<class T, T N>
bool VerifyGT(T value) {
  return value > N;
}

bool (*test1)(int) = &VerifyGE< int, (int) 0>;  // (1)
bool (*test2)(double) = &VerifyGE< double, (double) 0.0>;  // (2)

When compiling: test1 initialization succeeds, test2 fails with "doesn not match required type". Any ideas?

Answer 1

Non-type template arguments cannot be of floating-point type. Only integral types, enumerations, pointers and references are allowed.