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/*=============================================================================
Copyright (c) 2006-2007 Tobias Schwinger
Use modification and distribution are subject to 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).
==============================================================================*/
#include <boost/fusion/functional/adapter/unfused_generic.hpp>
#include <boost/detail/lightweight_test.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/noncopyable.hpp>
#include <boost/blank.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/utility/result_of.hpp>
#include <boost/fusion/algorithm/iteration/fold.hpp>
namespace fusion = boost::fusion;
namespace mpl = boost::mpl;
using boost::noncopyable;
typedef mpl::true_ no_nullary_call;
template <class Base = boost::blank>
struct test_func
: Base
{
template <typename Sig>
struct result;
template <class Self, class Seq>
struct result< Self (Seq) >
: mpl::identity<long>
{ };
template <typename Seq>
long operator()(Seq const & seq) const
{
long state = 0;
return fusion::fold(seq, state, fold_op());
}
template <typename Seq>
long operator()(Seq const & seq)
{
long state = 100;
return fusion::fold(seq, state, fold_op());
}
private:
struct fold_op
{
template <typename T>
long operator()(T const & elem, long value) const
{
return value + sizeof(T) * elem;
}
template <typename T>
long operator()(T & elem, long value) const
{
elem += sizeof(T);
return value;
}
template <typename Sig>
struct result;
template <class Self, typename T0, typename T1> struct result< Self(T0,T1) >
: mpl::identity<long>
{ };
};
};
void result_type_tests()
{
using boost::is_same;
typedef fusion::unfused_generic< test_func<> > t;
BOOST_TEST(( is_same< boost::result_of< t () >::type, long >::value ));
BOOST_TEST(( is_same< boost::result_of< t (int) >::type, long >::value ));
}
int main()
{
result_type_tests();
test_func<noncopyable> f;
fusion::unfused_generic< test_func<> > unfused_func;
fusion::unfused_generic< test_func<noncopyable> & > unfused_func_ref(f);
fusion::unfused_generic< test_func<> const > unfused_func_c;
fusion::unfused_generic< test_func<> > const unfused_func_c2;
fusion::unfused_generic< test_func<noncopyable> const & > unfused_func_c_ref(f);
BOOST_TEST(unfused_func() == 100);
BOOST_TEST(unfused_func_ref() == 100);
BOOST_TEST(unfused_func_c() == 0);
BOOST_TEST(unfused_func_c2() == 0);
BOOST_TEST(unfused_func_c_ref() == 0);
long lvalue = 12;
// also test const lvalues to pick up compiler deficiencies in that area
int const clvalue_1 = 1;
long const clvalue_2 = 2;
static const long expected = 1*sizeof(int) + 2*sizeof(long) + 7*sizeof(char);
BOOST_TEST(unfused_func(lvalue,lvalue,clvalue_1,clvalue_2,'\007') == 100 + expected);
BOOST_TEST(lvalue == 12 + 2*sizeof(long));
BOOST_TEST(unfused_func_ref(lvalue,lvalue,1,2l,'\007') == 100 + expected);
BOOST_TEST(lvalue == 12 + 4*sizeof(long));
BOOST_TEST(unfused_func_c(lvalue,lvalue,1,2l,'\007') == 0 + expected);
BOOST_TEST(lvalue == 12 + 6*sizeof(long));
BOOST_TEST(unfused_func_c2(lvalue,lvalue,1,2l,'\007') == 0 + expected);
BOOST_TEST(lvalue == 12 + 8*sizeof(long));
BOOST_TEST(unfused_func_c_ref(lvalue,lvalue,1,2l,'\007') == 0 + expected);
BOOST_TEST(lvalue == 12 + 10*sizeof(long));
return boost::report_errors();
}
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