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80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/test/lambda.cpp source file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2001-02
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// Aleksey Gurtovoy
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//
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// Permission to use, copy, modify, distribute and sell this software
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// and its documentation for any purpose is hereby granted without fee,
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// provided that the above copyright notice appears in all copies and
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// that both the copyright notice and this permission notice appear in
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// supporting documentation. No representations are made about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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#include "boost/mpl/logical.hpp"
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#include "boost/mpl/comparison.hpp"
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#include "boost/mpl/lambda.hpp"
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#include "boost/mpl/int.hpp"
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#include "boost/mpl/bool.hpp"
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#include "boost/mpl/sizeof.hpp"
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#include "boost/mpl/apply.hpp"
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#include "boost/type_traits/is_same.hpp"
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#include "boost/type_traits/is_float.hpp"
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#include "boost/static_assert.hpp"
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namespace mpl = boost::mpl;
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struct my
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{
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char a[100];
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};
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int main()
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{
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using namespace mpl::placeholders;
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// !(x == char) && !(x == double) && x convertible to int || sizeof(x) > 8
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typedef mpl::lambda<
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mpl::or_<
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mpl::and_<
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mpl::not_< boost::is_same<_1, char> >
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, mpl::not_< boost::is_float<_1> >
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>
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, mpl::greater< mpl::sizeof_<_1>, mpl::size_t<8> >
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>
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>::type f1;
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BOOST_STATIC_ASSERT((!mpl::apply1<f1,char>::type::value));
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BOOST_STATIC_ASSERT((!mpl::apply1<f1,double>::type::value));
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BOOST_STATIC_ASSERT((mpl::apply1<f1,long>::type::value));
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BOOST_STATIC_ASSERT((mpl::apply1<f1,my>::type::value));
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// x == y || x == my || sizeof(x) == sizeof(y)
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typedef mpl::lambda<
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mpl::or_<
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boost::is_same<_1, _2>
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, boost::is_same<_2, my>
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, mpl::equal_to< mpl::sizeof_<_1>, mpl::sizeof_<_2> >
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>
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>::type f2;
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BOOST_STATIC_ASSERT((!mpl::apply2<f2,double,char>::type::value));
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BOOST_STATIC_ASSERT((!mpl::apply2<f2,my,int>::type::value));
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BOOST_STATIC_ASSERT((!mpl::apply2<f2,my,char[99]>::type::value));
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BOOST_STATIC_ASSERT((mpl::apply2<f2,int,int>::type::value));
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BOOST_STATIC_ASSERT((mpl::apply2<f2,my,my>::type::value));
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BOOST_STATIC_ASSERT((mpl::apply2<f2,signed long, unsigned long>::type::value));
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// bind <-> lambda interaction
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typedef mpl::lambda< mpl::less<_1,_2> >::type pred;
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typedef mpl::bind2< pred, _1, mpl::int_<4> > f3;
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BOOST_STATIC_ASSERT((mpl::apply1< f3,mpl::int_<3> >::type::value));
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return 0;
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}
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