forked from boostorg/mpl
104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
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#ifndef BOOST_MPL_SET_AUX_ITEM_HPP_INCLUDED
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#define BOOST_MPL_SET_AUX_ITEM_HPP_INCLUDED
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// + file: boost/mpl/aux_/item.hpp
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// + last modified: 03/may/03
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// Copyright (c) 2002-03
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// David Abrahams, 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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//
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// See http://www.boost.org/libs/mpl for documentation.
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#include "boost/mpl/long.hpp"
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#include "boost/mpl/void_fwd.hpp"
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#include "boost/mpl/set/aux_/set0.hpp"
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#include "boost/mpl/aux_/yes_no.hpp"
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#include "boost/mpl/aux_/type_wrapper.hpp"
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#include "boost/mpl/aux_/config/static_constant.hpp"
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#include "boost/mpl/aux_/config/workaround.hpp"
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namespace boost {
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namespace mpl {
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aux::no_tag operator/(set0<> const&, void*);
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aux::no_tag operator%(set0<> const&, void*);
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// agurt, 03/may/03: forward declarations of operators, to supressing a GCC warning,
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// see below; breaks 2.95.x!
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#if BOOST_WORKAROUND(__GNUC__, > 2) && BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(3))
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template< typename T, typename Base > struct s_item;
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template< typename T, typename Base > struct s_mask;
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template< typename T, typename Base >
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typename s_item<T,Base>::order_tag
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operator/(s_item<T,Base> const&, aux::type_wrapper<T>*);
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template< typename T, typename Base >
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aux::yes_tag operator%(s_item<T,Base> const&, aux::type_wrapper<T>*);
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template< typename T, typename Base >
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aux::no_tag operator%(s_mask<T,Base> const&, aux::type_wrapper<T>*);
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#endif
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#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x561))
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namespace aux {
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template< long n_ > struct order_tag_
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{
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typedef char (&type)[n_];
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};
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}
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#endif
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template< typename T, typename Base >
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struct s_item
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: Base
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{
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typedef void_ last_masked;
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typedef T item;
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typedef Base base;
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BOOST_STATIC_CONSTANT(long, order = Base::order + 1);
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#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x561))
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typedef typename aux::order_tag_<(Base::order + 1)>::type order_tag;
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#else
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typedef char (&order_tag)[order];
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#endif
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#if BOOST_WORKAROUND(__GNUC__, > 2) && BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(3))
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// to make GCC happy
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friend order_tag operator/<>(s_item const&, aux::type_wrapper<T>*);
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friend aux::yes_tag operator%<>(s_item const&, aux::type_wrapper<T>*);
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#else
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friend order_tag operator/(s_item const&, aux::type_wrapper<T>*);
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friend aux::yes_tag operator%(s_item const&, aux::type_wrapper<T>*);
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#endif
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};
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template< typename T, typename Base >
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struct s_mask
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: Base
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{
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typedef T last_masked;
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#if BOOST_WORKAROUND(__GNUC__, > 2) && BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(3))
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// to make GCC happy
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friend aux::no_tag operator%<>(s_mask const&, aux::type_wrapper<T>*);
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#else
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friend aux::no_tag operator%(s_mask const&, aux::type_wrapper<T>*);
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#endif
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};
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}}
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#endif // BOOST_MPL_SET_AUX_ITEM_HPP_INCLUDED
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