ceph/src/boost/libs/bind/test/protect_test2.cpp

   1 // protect_test2.cpp
   2 //
   3 // Copyright 2020 Peter Dimov
   4 // Distributed under the Boost Software License, Version 1.0.
   5 // https://www.boost.org/LICENSE_1_0.txt
   6
   7 #include <boost/bind/protect.hpp>
   8 #include <boost/core/lightweight_test_trait.hpp>
   9 #include <boost/core/is_same.hpp>
  10
  11 template<class T, class F> void test( F )
  12 {
  13     BOOST_TEST_TRAIT_TRUE((boost::core::is_same<typename T::result_type, typename F::result_type>));
  14 }
  15
  16 struct X
  17 {
  18     struct result_type {};
  19 };
  20
  21 struct Y
  22 {
  23 };
  24
  25 template<class T, class U> struct inherit: T, U
  26 {
  27 };
  28
  29 template<class F> void test2( F )
  30 {
  31     // test that F doesn't have ::result_type
  32     BOOST_TEST_TRAIT_TRUE((boost::core::is_same<typename inherit<F, X>::result_type, typename X::result_type>));
  33 }
  34
  35 int main()
  36 {
  37     test<X>( boost::protect( X() ) );
  38
  39 #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_NO_CXX11_DECLTYPE) && !(defined(BOOST_GCC) && BOOST_GCC < 40600)
  40
  41     test2( boost::protect( Y() ) );
  42
  43 #endif
  44
  45     return boost::report_errors();
  46 }