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Diffstat (limited to '3rdParty/Boost/src/boost/proto/functional/fusion/at.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/proto/functional/fusion/at.hpp | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/proto/functional/fusion/at.hpp b/3rdParty/Boost/src/boost/proto/functional/fusion/at.hpp new file mode 100644 index 0000000..328ac13 --- /dev/null +++ b/3rdParty/Boost/src/boost/proto/functional/fusion/at.hpp @@ -0,0 +1,56 @@ +/////////////////////////////////////////////////////////////////////////////// +/// \file at.hpp +/// Proto callables Fusion at +// +// Copyright 2010 Eric Niebler. Distributed under the Boost +// Software License, Version 1.0. (See accompanying file +// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) + +#ifndef BOOST_PROTO_FUNCTIONAL_FUSION_AT_HPP_EAN_11_27_2010 +#define BOOST_PROTO_FUNCTIONAL_FUSION_AT_HPP_EAN_11_27_2010 + +#include <boost/type_traits/add_const.hpp> +#include <boost/type_traits/remove_const.hpp> +#include <boost/type_traits/remove_reference.hpp> +#include <boost/fusion/include/at.hpp> +#include <boost/proto/proto_fwd.hpp> + +namespace boost { namespace proto { namespace functional +{ + /// \brief A PolymorphicFunctionObject type that invokes the + /// \c fusion::at() accessor on its argument. + /// + /// A PolymorphicFunctionObject type that invokes the + /// \c fusion::at() accessor on its argument. + struct at + { + BOOST_PROTO_CALLABLE() + + template<typename Sig> + struct result; + + template<typename This, typename Seq, typename N> + struct result<This(Seq, N)> + : fusion::result_of::at< + typename boost::remove_reference<Seq>::type + , typename boost::remove_const<typename boost::remove_reference<N>::type>::type + > + {}; + + template<typename Seq, typename N> + typename fusion::result_of::at<Seq, N>::type + operator ()(Seq &seq, N const & BOOST_PROTO_DISABLE_IF_IS_CONST(Seq)) const + { + return fusion::at<N>(seq); + } + + template<typename Seq, typename N> + typename fusion::result_of::at<Seq const, N>::type + operator ()(Seq const &seq, N const &) const + { + return fusion::at<N>(seq); + } + }; +}}} + +#endif |