| 1 | /*============================================================================= |
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| 2 | Copyright (c) 2003 Joel de Guzman |
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| 3 | Copyright (c) 2004 Peder Holt |
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| 4 | |
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| 5 | Use, modification and distribution is subject to the Boost Software |
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| 6 | License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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| 7 | http://www.boost.org/LICENSE_1_0.txt) |
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| 8 | ==============================================================================*/ |
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| 9 | #if !defined(FUSION_ALGORITHM_REMOVE_HPP) |
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| 10 | #define FUSION_ALGORITHM_REMOVE_HPP |
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| 11 | |
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| 12 | #include <boost/spirit/fusion/sequence/filter_view.hpp> |
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| 13 | #include <boost/mpl/not.hpp> |
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| 14 | #include <boost/type_traits/is_same.hpp> |
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| 15 | |
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| 16 | namespace boost { namespace fusion |
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| 17 | { |
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| 18 | namespace meta |
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| 19 | { |
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| 20 | template <typename Sequence, typename T> |
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| 21 | struct remove |
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| 22 | { |
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| 23 | typedef filter_view<Sequence, mpl::not_<is_same<mpl::_, T> > > type; |
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| 24 | }; |
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| 25 | } |
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| 26 | |
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| 27 | namespace function |
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| 28 | { |
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| 29 | struct remove |
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| 30 | { |
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| 31 | template <typename Sequence, typename T> |
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| 32 | struct apply : meta::remove<Sequence, T> {}; |
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| 33 | |
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| 34 | template <typename Sequence, typename T> |
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| 35 | inline filter_view< |
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| 36 | Sequence const |
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| 37 | , mpl::not_<is_same<mpl::_, typename T::type> > > |
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| 38 | operator()(Sequence const& seq, T) const |
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| 39 | { |
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| 40 | return filter_view< |
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| 41 | Sequence const |
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| 42 | , mpl::not_<is_same<mpl::_, BOOST_DEDUCED_TYPENAME T::type> |
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| 43 | > >(seq); |
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| 44 | } |
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| 45 | |
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| 46 | template <typename Sequence, typename T> |
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| 47 | inline filter_view< |
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| 48 | Sequence |
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| 49 | , mpl::not_<is_same<mpl::_, typename T::type> > > |
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| 50 | operator()(Sequence& seq, T) const |
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| 51 | { |
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| 52 | return filter_view< |
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| 53 | Sequence |
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| 54 | , mpl::not_<is_same<mpl::_, BOOST_DEDUCED_TYPENAME T::type> |
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| 55 | > >(seq); |
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| 56 | } |
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| 57 | }; |
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| 58 | } |
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| 59 | |
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| 60 | function::remove const remove = function::remove(); |
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| 61 | }} |
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| 62 | |
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| 63 | #endif |
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| 64 | |
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