File: decltype54.C

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gcc-arm-none-eabi 15%3A7-2018-q2-5
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// PR c++/51908
// { dg-do compile { target c++11 } }

struct foo1
{
  template <typename Ret, typename... Args>
  operator decltype(static_cast<Ret (*)(Args...)>(nullptr)) () const;
};

struct foo2
{
  template <typename Ret, typename... Args>
  operator decltype(static_cast<Ret (*)(Args... args)>(nullptr)) () const;
};

struct foo3
{
  template <typename Ret, typename Arg>
  operator decltype(static_cast<Ret (*)(Arg)>(nullptr)) () const;
};

struct foo4
{
  template <typename Ret, typename Arg>
  operator decltype(static_cast<Ret (*)(Arg arg)>(nullptr)) () const;
};