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Diffstat (limited to '3rdParty/Boost/src/boost/proto/deep_copy.hpp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/proto/deep_copy.hpp | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/proto/deep_copy.hpp b/3rdParty/Boost/src/boost/proto/deep_copy.hpp new file mode 100644 index 0000000..104881f --- /dev/null +++ b/3rdParty/Boost/src/boost/proto/deep_copy.hpp @@ -0,0 +1,213 @@ +#ifndef BOOST_PP_IS_ITERATING + /////////////////////////////////////////////////////////////////////////////// + /// \file deep_copy.hpp + /// Replace all nodes stored by reference by nodes stored by value. + // + // Copyright 2008 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_DEEP_COPY_HPP_EAN_11_21_2006 + #define BOOST_PROTO_DEEP_COPY_HPP_EAN_11_21_2006 + + #include <boost/preprocessor/cat.hpp> + #include <boost/preprocessor/repetition/enum.hpp> + #include <boost/preprocessor/iteration/iterate.hpp> + #include <boost/mpl/if.hpp> + #include <boost/type_traits/remove_reference.hpp> + #include <boost/proto/proto_fwd.hpp> + #include <boost/proto/args.hpp> + #include <boost/proto/expr.hpp> + + namespace boost { namespace proto + { + namespace detail + { + template<typename Expr, long Arity = Expr::proto_arity_c> + struct deep_copy_impl; + + template<typename Expr> + struct deep_copy_impl<Expr, 0> + { + typedef + typename base_expr< + typename Expr::proto_domain + , tag::terminal + , term<typename term_traits<typename Expr::proto_child0>::value_type> + >::type + expr_type; + + typedef typename Expr::proto_generator proto_generator; + typedef typename proto_generator::template result<proto_generator(expr_type)>::type result_type; + + template<typename Expr2, typename S, typename D> + result_type operator()(Expr2 const &e, S const &, D const &) const + { + return proto_generator()(expr_type::make(e.proto_base().child0)); + } + }; + } + + namespace result_of + { + /// \brief A metafunction for calculating the return type + /// of \c proto::deep_copy(). + /// + /// A metafunction for calculating the return type + /// of \c proto::deep_copy(). The type parameter \c Expr + /// should be the type of a Proto expression tree. + /// It should not be a reference type, nor should it + /// be cv-qualified. + template<typename Expr> + struct deep_copy + { + typedef + typename detail::deep_copy_impl< + BOOST_PROTO_UNCVREF(Expr) + >::result_type + type; + }; + } + + namespace functional + { + /// \brief A PolymorphicFunctionObject type for deep-copying + /// Proto expression trees. + /// + /// A PolymorphicFunctionObject type for deep-copying + /// Proto expression trees. When a tree is deep-copied, + /// all internal nodes and most terminals held by reference + /// are instead held by value. + /// + /// \attention Terminals of reference-to-function type are + /// left unchanged. Terminals of reference-to-array type are + /// stored by value, which can cause a large amount of data + /// to be passed by value and stored on the stack. + struct deep_copy + { + BOOST_PROTO_CALLABLE() + + template<typename Sig> + struct result; + + template<typename This, typename Expr> + struct result<This(Expr)> + { + typedef + typename detail::deep_copy_impl< + BOOST_PROTO_UNCVREF(Expr) + >::result_type + type; + }; + + /// \brief Deep-copies a Proto expression tree, turning all + /// nodes and terminals held by reference into ones held by + /// value. + template<typename Expr> + typename result_of::deep_copy<Expr>::type + operator()(Expr const &e) const + { + return proto::detail::deep_copy_impl<Expr>()(e, 0, 0); + } + }; + } + + /// \brief A function for deep-copying + /// Proto expression trees. + /// + /// A function for deep-copying + /// Proto expression trees. When a tree is deep-copied, + /// all internal nodes and most terminals held by reference + /// are instead held by value. + /// + /// \attention Terminals of reference-to-function type are + /// left unchanged. + /// + /// \sa proto::functional::deep_copy. + template<typename Expr> + typename proto::result_of::deep_copy<Expr>::type + deep_copy(Expr const &e) + { + return proto::detail::deep_copy_impl<Expr>()(e, 0, 0); + } + + /// \brief A PrimitiveTransform for deep-copying + /// Proto expression trees. + /// + /// A PrimitiveTransform for deep-copying + /// Proto expression trees. When a tree is deep-copied, + /// all internal nodes and most terminals held by reference + /// are instead held by value. + /// + /// \attention Terminals of reference-to-function type are + /// left unchanged. + /// + /// \sa proto::functional::deep_copy. + struct _deep_copy + : proto::transform<_deep_copy> + { + template<typename E, typename S, typename D> + struct impl + : detail::deep_copy_impl<BOOST_PROTO_UNCVREF(E)> + {}; + }; + + namespace detail + { + #define BOOST_PROTO_DEFINE_DEEP_COPY_TYPE(Z, N, DATA) \ + typename deep_copy_impl< \ + typename remove_reference< \ + typename Expr::BOOST_PP_CAT(proto_child, N) \ + >::type::proto_derived_expr \ + >::result_type \ + /**/ + + #define BOOST_PROTO_DEFINE_DEEP_COPY_FUN(Z, N, DATA) \ + proto::deep_copy(e.proto_base().BOOST_PP_CAT(child, N)) \ + /**/ + + #define BOOST_PP_ITERATION_PARAMS_1 (3, (1, BOOST_PROTO_MAX_ARITY, <boost/proto/deep_copy.hpp>)) + #include BOOST_PP_ITERATE() + + #undef BOOST_PROTO_DEFINE_DEEP_COPY_FUN + #undef BOOST_PROTO_DEFINE_DEEP_COPY_TYPE + } + + }} + + #endif // BOOST_PROTO_COMPILER_DEEP_COPY_HPP_EAN_11_21_2006 + +#else + + #define N BOOST_PP_ITERATION() + + template<typename Expr> + struct deep_copy_impl<Expr, N> + { + typedef + typename base_expr< + typename Expr::proto_domain + , typename Expr::proto_tag + , BOOST_PP_CAT(list, N)< + BOOST_PP_ENUM(N, BOOST_PROTO_DEFINE_DEEP_COPY_TYPE, ~) + > + >::type + expr_type; + + typedef typename Expr::proto_generator proto_generator; + typedef typename proto_generator::template result<proto_generator(expr_type)>::type result_type; + + template<typename Expr2, typename S, typename D> + result_type operator()(Expr2 const &e, S const &, D const &) const + { + expr_type const that = { + BOOST_PP_ENUM(N, BOOST_PROTO_DEFINE_DEEP_COPY_FUN, ~) + }; + + return proto_generator()(that); + } + }; + + #undef N + +#endif |