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// { dg-do compile }

// { dg-options "-std=gnu++0x" }

// From N2235

// function template 1

template

  constexpr int bytesize(T t)

  { return sizeof (t); }        // OK

char buf[bytesize(0)];          // OK -- not C99 VLA

// function template 2

template

  constexpr _Tp

  square(_Tp x) { return x; }

// Explicit specialization

template<>

  constexpr unsigned long

  square(unsigned long x) { return x * x; }

// Explicit instantiation

template int square(int);

class A { };

template A square(A);

template long square(long);