Swiftdiff options
Diffstat (limited to '3rdParty/Boost/src/boost/proto/context/default.hpp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/proto/context/default.hpp | 409 |
1 files changed, 409 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/proto/context/default.hpp b/3rdParty/Boost/src/boost/proto/context/default.hpp new file mode 100644 index 0000000..f3e586f --- /dev/null +++ b/3rdParty/Boost/src/boost/proto/context/default.hpp @@ -0,0 +1,409 @@ +/////////////////////////////////////////////////////////////////////////////// +/// \file default.hpp +/// Definintion of default_context, a default evaluation context for +/// proto::eval() that uses Boost.Typeof to deduce return types +/// of the built-in operators. +// +// 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_CONTEXT_DEFAULT_HPP_EAN_01_08_2007 +#define BOOST_PROTO_CONTEXT_DEFAULT_HPP_EAN_01_08_2007 + +#include <boost/config.hpp> +#include <boost/preprocessor/arithmetic/add.hpp> +#include <boost/preprocessor/arithmetic/sub.hpp> +#include <boost/preprocessor/iteration/iterate.hpp> +#include <boost/preprocessor/repetition/enum.hpp> +#include <boost/preprocessor/repetition/enum_shifted.hpp> +#include <boost/utility/result_of.hpp> +#include <boost/type_traits/is_const.hpp> +#include <boost/type_traits/is_function.hpp> +#include <boost/type_traits/remove_reference.hpp> +#include <boost/type_traits/is_member_pointer.hpp> +#include <boost/type_traits/is_member_object_pointer.hpp> +#include <boost/type_traits/is_member_function_pointer.hpp> +#include <boost/proto/proto_fwd.hpp> +#include <boost/proto/tags.hpp> +#include <boost/proto/eval.hpp> +#include <boost/proto/traits.hpp> // for proto::child_c() +#include <boost/proto/detail/decltype.hpp> + +namespace boost { namespace proto +{ +/// INTERNAL ONLY +/// +#define UNREF(x) typename boost::remove_reference<x>::type + + namespace context + { + template< + typename Expr + , typename Context + , typename Tag // = typename Expr::proto_tag + , long Arity // = Expr::proto_arity_c + > + struct default_eval + {}; + + template<typename Expr, typename Context> + struct default_eval<Expr, Context, tag::terminal, 0> + { + typedef + typename proto::result_of::value<Expr &>::type + result_type; + + result_type operator ()(Expr &expr, Context &) const + { + return proto::value(expr); + } + }; + + /// INTERNAL ONLY + /// + #define BOOST_PROTO_UNARY_DEFAULT_EVAL(OP, TAG, MAKE) \ + template<typename Expr, typename Context> \ + struct default_eval<Expr, Context, TAG, 1> \ + { \ + private: \ + typedef typename proto::result_of::child_c<Expr, 0>::type e0; \ + typedef typename proto::result_of::eval<UNREF(e0), Context>::type r0; \ + public: \ + BOOST_PROTO_DECLTYPE_(OP proto::detail::MAKE<r0>(), result_type) \ + result_type operator ()(Expr &expr, Context &ctx) const \ + { \ + return OP proto::eval(proto::child_c<0>(expr), ctx); \ + } \ + }; \ + /**/ + + /// INTERNAL ONLY + /// + #define BOOST_PROTO_BINARY_DEFAULT_EVAL(OP, TAG, LMAKE, RMAKE) \ + template<typename Expr, typename Context> \ + struct default_eval<Expr, Context, TAG, 2> \ + { \ + private: \ + typedef typename proto::result_of::child_c<Expr, 0>::type e0; \ + typedef typename proto::result_of::child_c<Expr, 1>::type e1; \ + typedef typename proto::result_of::eval<UNREF(e0), Context>::type r0; \ + typedef typename proto::result_of::eval<UNREF(e1), Context>::type r1; \ + public: \ + BOOST_PROTO_DECLTYPE_( \ + proto::detail::LMAKE<r0>() OP proto::detail::RMAKE<r1>() \ + , result_type \ + ) \ + result_type operator ()(Expr &expr, Context &ctx) const \ + { \ + return proto::eval( \ + proto::child_c<0>(expr), ctx) OP proto::eval(proto::child_c<1>(expr) \ + , ctx \ + ); \ + } \ + }; \ + /**/ + + BOOST_PROTO_UNARY_DEFAULT_EVAL(+, proto::tag::unary_plus, make) + BOOST_PROTO_UNARY_DEFAULT_EVAL(-, proto::tag::negate, make) + BOOST_PROTO_UNARY_DEFAULT_EVAL(*, proto::tag::dereference, make) + BOOST_PROTO_UNARY_DEFAULT_EVAL(~, proto::tag::complement, make) + BOOST_PROTO_UNARY_DEFAULT_EVAL(&, proto::tag::address_of, make) + BOOST_PROTO_UNARY_DEFAULT_EVAL(!, proto::tag::logical_not, make) + BOOST_PROTO_UNARY_DEFAULT_EVAL(++, proto::tag::pre_inc, make_mutable) + BOOST_PROTO_UNARY_DEFAULT_EVAL(--, proto::tag::pre_dec, make_mutable) + + BOOST_PROTO_BINARY_DEFAULT_EVAL(<<, proto::tag::shift_left, make_mutable, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(>>, proto::tag::shift_right, make_mutable, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(*, proto::tag::multiplies, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(/, proto::tag::divides, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(%, proto::tag::modulus, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(+, proto::tag::plus, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(-, proto::tag::minus, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(<, proto::tag::less, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(>, proto::tag::greater, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(<=, proto::tag::less_equal, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(>=, proto::tag::greater_equal, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(==, proto::tag::equal_to, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(!=, proto::tag::not_equal_to, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(||, proto::tag::logical_or, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(&&, proto::tag::logical_and, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(&, proto::tag::bitwise_and, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(|, proto::tag::bitwise_or, make, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(^, proto::tag::bitwise_xor, make, make) + + BOOST_PROTO_BINARY_DEFAULT_EVAL(=, proto::tag::assign, make_mutable, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(<<=, proto::tag::shift_left_assign, make_mutable, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(>>=, proto::tag::shift_right_assign, make_mutable, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(*=, proto::tag::multiplies_assign, make_mutable, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(/=, proto::tag::divides_assign, make_mutable, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(%=, proto::tag::modulus_assign, make_mutable, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(+=, proto::tag::plus_assign, make_mutable, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(-=, proto::tag::minus_assign, make_mutable, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(&=, proto::tag::bitwise_and_assign, make_mutable, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(|=, proto::tag::bitwise_or_assign, make_mutable, make) + BOOST_PROTO_BINARY_DEFAULT_EVAL(^=, proto::tag::bitwise_xor_assign, make_mutable, make) + + #undef BOOST_PROTO_UNARY_DEFAULT_EVAL + #undef BOOST_PROTO_BINARY_DEFAULT_EVAL + + /// INTERNAL ONLY + template<typename Expr, typename Context> + struct is_member_function_eval + : is_member_function_pointer< + typename detail::uncvref< + typename proto::result_of::eval< + typename remove_reference< + typename proto::result_of::child_c<Expr, 1>::type + >::type + , Context + >::type + >::type + > + {}; + + /// INTERNAL ONLY + template<typename Expr, typename Context, bool IsMemFunCall> + struct memfun_eval + { + private: + typedef typename result_of::child_c<Expr, 0>::type e0; + typedef typename result_of::child_c<Expr, 1>::type e1; + typedef typename proto::result_of::eval<UNREF(e0), Context>::type r0; + typedef typename proto::result_of::eval<UNREF(e1), Context>::type r1; + public: + typedef typename detail::mem_ptr_fun<r0, r1>::result_type result_type; + result_type operator ()(Expr &expr, Context &ctx) const + { + return detail::mem_ptr_fun<r0, r1>()( + proto::eval(proto::child_c<0>(expr), ctx) + , proto::eval(proto::child_c<1>(expr), ctx) + ); + } + }; + + /// INTERNAL ONLY + template<typename Expr, typename Context> + struct memfun_eval<Expr, Context, true> + { + private: + typedef typename result_of::child_c<Expr, 0>::type e0; + typedef typename result_of::child_c<Expr, 1>::type e1; + typedef typename proto::result_of::eval<UNREF(e0), Context>::type r0; + typedef typename proto::result_of::eval<UNREF(e1), Context>::type r1; + public: + typedef detail::memfun<r0, r1> result_type; + result_type const operator ()(Expr &expr, Context &ctx) const + { + return detail::memfun<r0, r1>( + proto::eval(proto::child_c<0>(expr), ctx) + , proto::eval(proto::child_c<1>(expr), ctx) + ); + } + }; + + template<typename Expr, typename Context> + struct default_eval<Expr, Context, tag::mem_ptr, 2> + : memfun_eval<Expr, Context, is_member_function_eval<Expr, Context>::value> + {}; + + // Handle post-increment specially. + template<typename Expr, typename Context> + struct default_eval<Expr, Context, proto::tag::post_inc, 1> + { + private: + typedef typename proto::result_of::child_c<Expr, 0>::type e0; + typedef typename proto::result_of::eval<UNREF(e0), Context>::type r0; + public: + BOOST_PROTO_DECLTYPE_(proto::detail::make_mutable<r0>() ++, result_type) + result_type operator ()(Expr &expr, Context &ctx) const + { + return proto::eval(proto::child_c<0>(expr), ctx) ++; + } + }; + + // Handle post-decrement specially. + template<typename Expr, typename Context> + struct default_eval<Expr, Context, proto::tag::post_dec, 1> + { + private: + typedef typename proto::result_of::child_c<Expr, 0>::type e0; + typedef typename proto::result_of::eval<UNREF(e0), Context>::type r0; + public: + BOOST_PROTO_DECLTYPE_(proto::detail::make_mutable<r0>() --, result_type) + result_type operator ()(Expr &expr, Context &ctx) const + { + return proto::eval(proto::child_c<0>(expr), ctx) --; + } + }; + + // Handle subscript specially. + template<typename Expr, typename Context> + struct default_eval<Expr, Context, proto::tag::subscript, 2> + { + private: + typedef typename proto::result_of::child_c<Expr, 0>::type e0; + typedef typename proto::result_of::child_c<Expr, 1>::type e1; + typedef typename proto::result_of::eval<UNREF(e0), Context>::type r0; + typedef typename proto::result_of::eval<UNREF(e1), Context>::type r1; + public: + BOOST_PROTO_DECLTYPE_(proto::detail::make_subscriptable<r0>()[proto::detail::make<r1>()], result_type) + result_type operator ()(Expr &expr, Context &ctx) const + { + return proto::eval(proto::child_c<0>(expr), ctx)[proto::eval(proto::child_c<1>(expr), ctx)]; + } + }; + + // Handle if_else_ specially. + template<typename Expr, typename Context> + struct default_eval<Expr, Context, proto::tag::if_else_, 3> + { + private: + typedef typename proto::result_of::child_c<Expr, 0>::type e0; + typedef typename proto::result_of::child_c<Expr, 1>::type e1; + typedef typename proto::result_of::child_c<Expr, 2>::type e2; + typedef typename proto::result_of::eval<UNREF(e0), Context>::type r0; + typedef typename proto::result_of::eval<UNREF(e1), Context>::type r1; + typedef typename proto::result_of::eval<UNREF(e2), Context>::type r2; + public: + BOOST_PROTO_DECLTYPE_( + proto::detail::make<r0>() + ? proto::detail::make<r1>() + : proto::detail::make<r2>() + , result_type + ) + result_type operator ()(Expr &expr, Context &ctx) const + { + return proto::eval(proto::child_c<0>(expr), ctx) + ? proto::eval(proto::child_c<1>(expr), ctx) + : proto::eval(proto::child_c<2>(expr), ctx); + } + }; + + // Handle comma specially. + template<typename Expr, typename Context> + struct default_eval<Expr, Context, proto::tag::comma, 2> + { + private: + typedef typename proto::result_of::child_c<Expr, 0>::type e0; + typedef typename proto::result_of::child_c<Expr, 1>::type e1; + typedef typename proto::result_of::eval<UNREF(e0), Context>::type r0; + typedef typename proto::result_of::eval<UNREF(e1), Context>::type r1; + public: + typedef typename proto::detail::comma_result<r0, r1>::type result_type; + result_type operator ()(Expr &expr, Context &ctx) const + { + return proto::eval(proto::child_c<0>(expr), ctx), proto::eval(proto::child_c<1>(expr), ctx); + } + }; + + // Handle function specially + #define BOOST_PROTO_DEFAULT_EVAL_TYPE(Z, N, DATA) \ + typename proto::result_of::eval< \ + typename remove_reference< \ + typename proto::result_of::child_c<DATA, N>::type \ + >::type \ + , Context \ + >::type \ + /**/ + + #define BOOST_PROTO_DEFAULT_EVAL(Z, N, DATA) \ + proto::eval(proto::child_c<N>(DATA), context) \ + /**/ + + template<typename Expr, typename Context> + struct default_eval<Expr, Context, proto::tag::function, 1> + { + typedef + typename proto::detail::result_of_fixup< + BOOST_PROTO_DEFAULT_EVAL_TYPE(~, 0, Expr) + >::type + function_type; + + typedef + typename BOOST_PROTO_RESULT_OF<function_type()>::type + result_type; + + result_type operator ()(Expr &expr, Context &context) const + { + return BOOST_PROTO_DEFAULT_EVAL(~, 0, expr)(); + } + }; + + template<typename Expr, typename Context> + struct default_eval<Expr, Context, proto::tag::function, 2> + { + typedef + typename proto::detail::result_of_fixup< + BOOST_PROTO_DEFAULT_EVAL_TYPE(~, 0, Expr) + >::type + function_type; + + typedef + typename detail::result_of_< + function_type(BOOST_PROTO_DEFAULT_EVAL_TYPE(~, 1, Expr)) + >::type + result_type; + + result_type operator ()(Expr &expr, Context &context) const + { + return this->invoke( + expr + , context + , is_member_function_pointer<function_type>() + , is_member_object_pointer<function_type>() + ); + } + + private: + result_type invoke(Expr &expr, Context &context, mpl::false_, mpl::false_) const + { + return BOOST_PROTO_DEFAULT_EVAL(~, 0, expr)(BOOST_PROTO_DEFAULT_EVAL(~, 1, expr)); + } + + result_type invoke(Expr &expr, Context &context, mpl::true_, mpl::false_) const + { + BOOST_PROTO_USE_GET_POINTER(); + typedef typename detail::class_member_traits<function_type>::class_type class_type; + return ( + BOOST_PROTO_GET_POINTER(class_type, (BOOST_PROTO_DEFAULT_EVAL(~, 1, expr))) ->* + BOOST_PROTO_DEFAULT_EVAL(~, 0, expr) + )(); + } + + result_type invoke(Expr &expr, Context &context, mpl::false_, mpl::true_) const + { + BOOST_PROTO_USE_GET_POINTER(); + typedef typename detail::class_member_traits<function_type>::class_type class_type; + return ( + BOOST_PROTO_GET_POINTER(class_type, (BOOST_PROTO_DEFAULT_EVAL(~, 1, expr))) ->* + BOOST_PROTO_DEFAULT_EVAL(~, 0, expr) + ); + } + }; + + // Additional specialization are generated by the preprocessor + #include <boost/proto/context/detail/default_eval.hpp> + + #undef BOOST_PROTO_DEFAULT_EVAL_TYPE + #undef BOOST_PROTO_DEFAULT_EVAL + + /// default_context + /// + struct default_context + { + /// default_context::eval + /// + template<typename Expr, typename ThisContext = default_context const> + struct eval + : default_eval<Expr, ThisContext> + {}; + }; + + } // namespace context + +}} // namespace boost::proto + +#undef UNREF + +#endif |