mirror of
https://github.com/boostorg/utility.git
synced 2025-11-04 02:11:45 +01:00
135 lines
4.0 KiB
C++
135 lines
4.0 KiB
C++
// Copyright David Abrahams and Aleksey Gurtovoy
|
|
// 2002-2004. Distributed under the Boost Software License, Version
|
|
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
|
|
// http://www.boost.org/LICENSE_1_0.txt)
|
|
|
|
// compile-time test for "boost/ref.hpp" header content
|
|
// see 'ref_test.cpp' for run-time part
|
|
|
|
#include <boost/ref.hpp>
|
|
#include <boost/type_traits/is_same.hpp>
|
|
#include <boost/type_traits/remove_const.hpp>
|
|
#include <boost/static_assert.hpp>
|
|
#include <boost/detail/workaround.hpp>
|
|
|
|
#include <boost/mpl/assert.hpp>
|
|
|
|
namespace {
|
|
|
|
template< typename T, typename U >
|
|
void ref_test(boost::reference_wrapper<U>)
|
|
{
|
|
typedef typename boost::reference_wrapper<U>::type type;
|
|
BOOST_STATIC_ASSERT((boost::is_same<U,type>::value));
|
|
BOOST_STATIC_ASSERT((boost::is_same<T,type>::value));
|
|
}
|
|
|
|
template< typename T >
|
|
void assignable_test(T x)
|
|
{
|
|
x = x;
|
|
}
|
|
|
|
template< bool R, typename T >
|
|
void is_reference_wrapper_test(T)
|
|
{
|
|
BOOST_STATIC_ASSERT(boost::is_reference_wrapper<T>::value == R);
|
|
}
|
|
|
|
template< typename R, typename Ref >
|
|
void cxx_reference_test(Ref)
|
|
{
|
|
#if BOOST_WORKAROUND(__BORLANDC__, < 0x600)
|
|
typedef typename boost::remove_const<Ref>::type ref;
|
|
BOOST_STATIC_ASSERT((boost::is_same<R,ref>::value));
|
|
#else
|
|
BOOST_STATIC_ASSERT((boost::is_same<R,Ref>::value));
|
|
#endif
|
|
}
|
|
|
|
template< typename R, typename Ref >
|
|
void unwrap_reference_test(Ref)
|
|
{
|
|
#if BOOST_WORKAROUND(__BORLANDC__, < 0x600)
|
|
typedef typename boost::remove_const<Ref>::type ref;
|
|
typedef typename boost::unwrap_reference<ref>::type type;
|
|
#else
|
|
typedef typename boost::unwrap_reference<Ref>::type type;
|
|
#endif
|
|
BOOST_STATIC_ASSERT((boost::is_same<R,type>::value));
|
|
}
|
|
|
|
} // namespace
|
|
|
|
int main()
|
|
{
|
|
int i = 0;
|
|
int& ri = i;
|
|
|
|
int const ci = 0;
|
|
int const& rci = ci;
|
|
|
|
// 'ref/cref' functions test
|
|
ref_test<int>(boost::ref(i));
|
|
ref_test<int>(boost::ref(ri));
|
|
ref_test<int const>(boost::ref(ci));
|
|
ref_test<int const>(boost::ref(rci));
|
|
|
|
ref_test<int const>(boost::cref(i));
|
|
ref_test<int const>(boost::cref(ri));
|
|
ref_test<int const>(boost::cref(ci));
|
|
ref_test<int const>(boost::cref(rci));
|
|
|
|
// test 'assignable' requirement
|
|
assignable_test(boost::ref(i));
|
|
assignable_test(boost::ref(ri));
|
|
assignable_test(boost::cref(i));
|
|
assignable_test(boost::cref(ci));
|
|
assignable_test(boost::cref(rci));
|
|
|
|
// 'is_reference_wrapper' test
|
|
is_reference_wrapper_test<true>(boost::ref(i));
|
|
is_reference_wrapper_test<true>(boost::ref(ri));
|
|
is_reference_wrapper_test<true>(boost::cref(i));
|
|
is_reference_wrapper_test<true>(boost::cref(ci));
|
|
is_reference_wrapper_test<true>(boost::cref(rci));
|
|
|
|
is_reference_wrapper_test<false>(i);
|
|
is_reference_wrapper_test<false, int&>(ri);
|
|
is_reference_wrapper_test<false>(ci);
|
|
is_reference_wrapper_test<false, int const&>(rci);
|
|
|
|
// ordinary references/function template arguments deduction test
|
|
cxx_reference_test<int>(i);
|
|
cxx_reference_test<int>(ri);
|
|
cxx_reference_test<int>(ci);
|
|
cxx_reference_test<int>(rci);
|
|
|
|
cxx_reference_test<int&, int&>(i);
|
|
cxx_reference_test<int&, int&>(ri);
|
|
cxx_reference_test<int const&, int const&>(i);
|
|
cxx_reference_test<int const&, int const&>(ri);
|
|
cxx_reference_test<int const&, int const&>(ci);
|
|
cxx_reference_test<int const&, int const&>(rci);
|
|
|
|
// 'unwrap_reference' test
|
|
unwrap_reference_test<int>(boost::ref(i));
|
|
unwrap_reference_test<int>(boost::ref(ri));
|
|
unwrap_reference_test<int const>(boost::cref(i));
|
|
unwrap_reference_test<int const>(boost::cref(ci));
|
|
unwrap_reference_test<int const>(boost::cref(rci));
|
|
|
|
unwrap_reference_test<int>(i);
|
|
unwrap_reference_test<int>(ri);
|
|
unwrap_reference_test<int>(ci);
|
|
unwrap_reference_test<int>(rci);
|
|
unwrap_reference_test<int&, int&>(i);
|
|
unwrap_reference_test<int&, int&>(ri);
|
|
unwrap_reference_test<int const&, int const&>(i);
|
|
unwrap_reference_test<int const&, int const&>(ri);
|
|
unwrap_reference_test<int const&, int const&>(ci);
|
|
unwrap_reference_test<int const&, int const&>(rci);
|
|
|
|
return 0;
|
|
}
|