File: variadic107.C

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gcc-arm-none-eabi 15%3A7-2018-q2-5
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// PR c++/48451
// { dg-do compile { target c++11 } }

namespace std {
  template <class T> T&& declval();
}

template<class T, class... Args,
 class = decltype(T(std::declval<Args>()...))
 >
char f(int);

struct From2Ints { From2Ints(int, int); };

static_assert(sizeof(f<From2Ints, int, int>(0)) == 1, "Error"); // b