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124 lines
3.6 KiB
C++
124 lines
3.6 KiB
C++
/*=============================================================================
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Copyright (c) 2006-2007 Tobias Schwinger
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Use modification and distribution are subject to the Boost Software
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License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt).
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==============================================================================*/
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#include <boost/fusion/functional/generation/make_unfused_generic.hpp>
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#include <boost/detail/lightweight_test.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/fusion/functional/adapter/detail/has_type.hpp>
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#include <boost/noncopyable.hpp>
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#include <boost/blank.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/mpl/and.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/mpl/identity.hpp>
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#include <boost/fusion/sequence/intrinsic/empty.hpp>
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#include <boost/fusion/algorithm/iteration/fold.hpp>
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#include <boost/ref.hpp>
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namespace fusion = boost::fusion;
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namespace mpl = boost::mpl;
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using boost::noncopyable;
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typedef mpl::true_ no_nullary_call;
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using boost::ref;
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using boost::cref;
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template <class Base = boost::blank, class RemoveNullary = mpl::false_>
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struct test_func
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: Base
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{
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template <class Seq> struct result
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: mpl::if_< mpl::and_< fusion::result_of::empty<Seq>, RemoveNullary >,
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boost::blank, mpl::identity<long> >::type
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{ };
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template <typename Seq>
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long operator()(Seq const & seq) const
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{
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long state = 0;
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return fusion::fold(seq, state, fold_op());
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}
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template < typename Seq >
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long operator()(Seq const & seq)
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{
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long state = 100;
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return fusion::fold(seq, state, fold_op());
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}
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private:
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struct fold_op
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{
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template <typename T>
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long operator()(T const & elem, long value) const
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{
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return value + sizeof(T) * elem;
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}
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template <typename T>
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long operator()(T & elem, long value) const
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{
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elem += sizeof(T);
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return value;
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}
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template <typename T0, typename T1> struct result
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: mpl::identity<long>
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{ };
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};
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};
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template <typename T>
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inline T const & const_(T const & t)
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{
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return t;
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}
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int main()
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{
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test_func<> f;
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test_func<noncopyable> f_nc;
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fusion::result_of::make_unfused_generic< test_func<> >::type unfused_func =
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fusion::make_unfused_generic(f);
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fusion::result_of::make_unfused_generic< boost::reference_wrapper<
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test_func<noncopyable> > >::type unfused_func_ref =
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fusion::make_unfused_generic(ref(f_nc));
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fusion::result_of::make_unfused_generic< boost::reference_wrapper<
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test_func<noncopyable> const> >::type unfused_func_c_ref =
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fusion::make_unfused_generic(cref(f_nc));
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BOOST_TEST(unfused_func() == 100);
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BOOST_TEST(const_(unfused_func)() == 0);
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BOOST_TEST(unfused_func_ref() == 100);
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BOOST_TEST(unfused_func_c_ref() == 0);
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long lvalue = 12;
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static const long expected = 1*sizeof(int) + 2*sizeof(long) + 7*sizeof(char);
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BOOST_TEST(unfused_func(lvalue,lvalue,1,2l,'\007') == 100 + expected);
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BOOST_TEST(lvalue == 12 + 2*sizeof(long));
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BOOST_TEST(const_(unfused_func)(lvalue,lvalue,1,2l,'\007') == 0 + expected);
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BOOST_TEST(lvalue == 12 + 4*sizeof(long));
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BOOST_TEST(unfused_func_ref(lvalue,lvalue,1,2l,'\007') == 100 + expected);
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BOOST_TEST(lvalue == 12 + 6*sizeof(long));
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BOOST_TEST(unfused_func_c_ref(lvalue,lvalue,1,2l,'\007') == 0 + expected);
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BOOST_TEST(lvalue == 12 + 8*sizeof(long));
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return boost::report_errors();
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}
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