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62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
// Copyright David Abrahams 2002. Permission to copy, use,
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// modify, sell and distribute this software is granted provided this
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// copyright notice appears in all copies. This software is provided
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// "as is" without express or implied warranty, and with no claim as
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// to its suitability for any purpose.
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#include <boost/static_assert.hpp>
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#include <boost/python/detail/if_else.hpp>
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#include <boost/type_traits/same_traits.hpp>
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typedef char c1;
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typedef char c2[2];
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typedef char c3[3];
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typedef char c4[4];
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template <unsigned size>
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struct choose
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{
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#if 1
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typedef typename boost::python::detail::if_<
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(sizeof(c1) == size)
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>::template then<
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c1
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>::template elif<
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(sizeof(c2) == size)
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>::template then<
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c2
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>::template elif<
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(sizeof(c3) == size)
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>::template then<
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c3
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>::template elif<
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(sizeof(c4) == size)
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>::template then<
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c4
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>::template else_<void*>::type type;
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#else
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typedef typename boost::python::detail::if_<
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(sizeof(c1) == size)
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, c1
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>::template elif<
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(sizeof(c2) == size)
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, c2
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>::template elif<
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(sizeof(c3) == size)
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, c3
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>::template elif<
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(sizeof(c4) == size)
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, c4
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>::template else_<void*>::type type;
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#endif
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};
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int main()
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{
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BOOST_STATIC_ASSERT((boost::is_same<choose<1>::type,c1>::value));
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BOOST_STATIC_ASSERT((boost::is_same<choose<2>::type,c2>::value));
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BOOST_STATIC_ASSERT((boost::is_same<choose<3>::type,c3>::value));
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BOOST_STATIC_ASSERT((boost::is_same<choose<4>::type,c4>::value));
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BOOST_STATIC_ASSERT((boost::is_same<choose<5>::type,void*>::value));
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return 0;
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}
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