File: variadic25.C

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gcc-riscv64-unknown-elf 8.3.0.2019.08%2Bdfsg-1
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// { dg-do compile { target c++11 } }
template<int... Values>
struct sum;

template<>
struct sum<> {
  static const int value = 0;
};

template<int Value, int... Values>
struct sum<Value, Values...> {
  static const int value = Value + sum<Values...>::value;
};

int a0[sum<>::value == 0? 1 : -1];
int a1[sum<1, 2, 3, 4, 5>::value == 15? 1 : -1];