ceph/src/boost/libs/core/test/eif_namespace_disambiguation.cpp

   1 // Boost enable_if library
   2
   3 // Copyright 2003 (c) The Trustees of Indiana University.
   4
   5 // Use, modification, and distribution is subject to the Boost Software
   6 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8
   9 //    Authors: Jaakko Jarvi (jajarvi at osl.iu.edu)
  10 //             Jeremiah Willcock (jewillco at osl.iu.edu)
  11 //             Andrew Lumsdaine (lums at osl.iu.edu)
  12
  13 #include <boost/config.hpp>
  14 #include <boost/utility/enable_if.hpp>
  15 #include <boost/type_traits/is_arithmetic.hpp>
  16 #include <boost/detail/lightweight_test.hpp>
  17
  18 using boost::enable_if;
  19 using boost::is_arithmetic;
  20
  21 template<class T> struct not_
  22 {
  23   BOOST_STATIC_CONSTANT( bool, value = !T::value );
  24 };
  25
  26 namespace A {
  27   template<class T>
  28   typename enable_if<is_arithmetic<T>, bool>::type
  29   arithmetic_object(T t) { return true; }
  30 }
  31
  32 namespace B {
  33   template<class T>
  34   typename enable_if<not_<is_arithmetic<T> >, bool>::type
  35   arithmetic_object(T t) { return false; }
  36 }
  37
  38 int main()
  39 {
  40   using namespace A;
  41   using namespace B;
  42   BOOST_TEST(arithmetic_object(1));
  43   BOOST_TEST(arithmetic_object(1.0));
  44
  45   BOOST_TEST(!arithmetic_object("1"));
  46   BOOST_TEST(!arithmetic_object(static_cast<void*>(0)));
  47
  48   return boost::report_errors();
  49 }
  50