mirror of
https://github.com/boostorg/mpl.git
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Douglas Gregor
75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/example/lambda2.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) 2002
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// Aleksey Gurtovoy
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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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#include "boost/mpl/v2_1.hpp"
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#include "boost/mpl/not.hpp"
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#include "boost/mpl/or.hpp"
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#include "boost/mpl/less.hpp"
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#include "boost/mpl/equal_to.hpp"
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#include "boost/mpl/multiplies.hpp"
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#include "boost/mpl/prior.hpp"
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#include "boost/mpl/find_if.hpp"
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#include "boost/mpl/count_if.hpp"
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#include "boost/mpl/filter_view.hpp"
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#include "boost/mpl/sizeof.hpp"
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#include "boost/static_assert.hpp"
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namespace mpl = boost::mpl;
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using namespace mpl::placeholders;
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using namespace mpl::v2_1;
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typedef EVAL(apply_(lambda(is_same(_,_)), int, int)) r;
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BOOST_STATIC_ASSERT(r::value);
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typedef eval<
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count_if(
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list(int,char,long,int)
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, lambda(is_same(_,int))
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)
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>::type res;
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BOOST_STATIC_ASSERT(res::value == 2);
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typedef eval<
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find_if(
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filter_view(
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list(int,float,char,long,double)
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, lambda(not_(is_float(_)))
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)
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, lambda( or_(
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is_same(_,short)
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, less(sizeof_(_),sizeof_(int))
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) )
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)
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>::type iter;
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typedef eval< is_same(iter::type,char) >::type res2;
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BOOST_STATIC_ASSERT(res2::value);
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METAFUNCTION(factorial, (N)
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, if_( equal_to( N, int_<0> )
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, int_<1>
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, multiplies( N, factorial( prior(N) ) )
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)
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)
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typedef EVAL(factorial(int_<1>)) fact;
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//BOOST_STATIC_ASSERT(fact::value == 1);
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