external/bsd/libc++/dist/libcxx/test/containers/test_hash.h

   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 #ifndef TEST_HASH_H
  11 #define TEST_HASH_H
  12
  13 #include <cstddef>
  14 #include <type_traits>
  15
  16 template <class C>
  17 class test_hash
  18     : private C
  19 {
  20     int data_;
  21 public:
  22     explicit test_hash(int data = 0) : data_(data) {}
  23
  24     std::size_t
  25     operator()(typename std::add_lvalue_reference<const typename C::argument_type>::type x) const
  26         {return C::operator()(x);}
  27
  28     bool operator==(const test_hash& c) const
  29         {return data_ == c.data_;}
  30 };
  31
  32 #endif  // TEST_HASH_H