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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 // <functional>
     11 
     12 // reference_wrapper
     13 
     14 // check for member typedef type
     15 
     16 #include <functional>
     17 #include <type_traits>
     18 
     19 class C {};
     20 
     21 int main()
     22 {
     23     static_assert((std::is_same<std::reference_wrapper<C>::type,
     24                                                        C>::value), "");
     25     static_assert((std::is_same<std::reference_wrapper<void ()>::type,
     26                                                        void ()>::value), "");
     27     static_assert((std::is_same<std::reference_wrapper<int* (double*)>::type,
     28                                                        int* (double*)>::value), "");
     29     static_assert((std::is_same<std::reference_wrapper<void(*)()>::type,
     30                                                        void(*)()>::value), "");
     31     static_assert((std::is_same<std::reference_wrapper<int*(*)(double*)>::type,
     32                                                        int*(*)(double*)>::value), "");
     33     static_assert((std::is_same<std::reference_wrapper<int*(C::*)(double*)>::type,
     34                                                        int*(C::*)(double*)>::value), "");
     35     static_assert((std::is_same<std::reference_wrapper<int (C::*)(double*) const volatile>::type,
     36                                                        int (C::*)(double*) const volatile>::value), "");
     37 }
     38