379 lines
24 KiB
C++
379 lines
24 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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/// \file operators.hpp
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/// Contains all the overloaded operators that make it possible to build
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/// Proto expression trees.
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//
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// Copyright 2008 Eric Niebler. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_PROTO_OPERATORS_HPP_EAN_04_01_2005
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#define BOOST_PROTO_OPERATORS_HPP_EAN_04_01_2005
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#include <boost/config.hpp>
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#include <boost/preprocessor/punctuation/comma.hpp>
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#include <boost/mpl/logical.hpp>
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#include <boost/utility/enable_if.hpp>
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#include <boost/proto/proto_fwd.hpp>
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#include <boost/proto/tags.hpp>
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#include <boost/proto/domain.hpp>
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#include <boost/proto/matches.hpp>
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#include <boost/proto/generate.hpp>
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#include <boost/proto/make_expr.hpp>
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#if defined(_MSC_VER)
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# pragma warning(push)
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# pragma warning(disable : 4714) // function 'xxx' marked as __forceinline not inlined
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#endif
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namespace boost { namespace proto
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{
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namespace detail
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{
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template<typename MakeExpr, typename Grammar>
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struct lazy_matches
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: proto::matches<typename MakeExpr::type, Grammar>
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{};
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template<typename Domain, typename Grammar, typename Trait, typename Tag, typename Arg>
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struct enable_unary
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: boost::lazy_enable_if_c<
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boost::mpl::and_<
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Trait
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, lazy_matches<result_of::make_expr<Tag, basic_default_domain, Arg>, Grammar>
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>::value
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, result_of::make_expr<Tag, Domain, Arg>
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>
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{};
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template<typename Domain, typename Trait, typename Tag, typename Arg>
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struct enable_unary<Domain, proto::_, Trait, Tag, Arg &>
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: boost::lazy_enable_if_c<
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Trait::value
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, result_of::make_expr<Tag, Domain, Arg &>
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>
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{};
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template<typename Trait, typename Tag, typename Arg>
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struct enable_unary<deduce_domain, not_a_grammar, Trait, Tag, Arg &>
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: enable_unary<
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typename domain_of<Arg>::type
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, typename domain_of<Arg>::type::proto_grammar
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, Trait
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, Tag
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, Arg &
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>
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{};
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template<typename Domain, typename Grammar, typename Trait, typename Tag, typename Left, typename Right>
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struct enable_binary
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: boost::lazy_enable_if_c<
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boost::mpl::and_<
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Trait
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, lazy_matches<result_of::make_expr<Tag, basic_default_domain, Left, Right>, Grammar>
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>::value
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, result_of::make_expr<Tag, Domain, Left, Right>
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>
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{};
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template<typename Domain, typename Trait, typename Tag, typename Left, typename Right>
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struct enable_binary<Domain, proto::_, Trait, Tag, Left &, Right &>
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: boost::lazy_enable_if_c<
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Trait::value
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, result_of::make_expr<Tag, Domain, Left &, Right &>
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>
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{};
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template<typename Trait, typename Tag, typename Left, typename Right>
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struct enable_binary<deduce_domain, not_a_grammar, Trait, Tag, Left &, Right &>
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: enable_binary<
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typename deduce_domain2<Left, Right>::type
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, typename deduce_domain2<Left, Right>::type::proto_grammar
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, Trait
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, Tag
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, Left &
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, Right &
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>
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{};
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} // detail
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#define BOOST_PROTO_UNARY_OP_IS_POSTFIX_0
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#define BOOST_PROTO_UNARY_OP_IS_POSTFIX_1 , int
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#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
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#define BOOST_PROTO_DEFINE_UNARY_OPERATOR(OP, TAG, TRAIT, DOMAIN, POST) \
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template<typename Arg> \
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BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \
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typename boost::proto::detail::enable_unary< \
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DOMAIN \
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, DOMAIN::proto_grammar \
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, BOOST_PROTO_APPLY_UNARY_(TRAIT, Arg) \
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, TAG \
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, Arg & \
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>::type const \
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operator OP(Arg &arg BOOST_PROTO_UNARY_OP_IS_POSTFIX_ ## POST) \
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{ \
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return boost::proto::detail::make_expr_<TAG, DOMAIN, Arg &>()(arg); \
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} \
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\
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template<typename Arg> \
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BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \
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typename boost::proto::detail::enable_unary< \
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DOMAIN \
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, DOMAIN::proto_grammar \
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, BOOST_PROTO_APPLY_UNARY_(TRAIT, Arg) \
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, TAG \
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, Arg const & \
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>::type const \
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operator OP(Arg const &arg BOOST_PROTO_UNARY_OP_IS_POSTFIX_ ## POST) \
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{ \
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return boost::proto::detail::make_expr_<TAG, DOMAIN, Arg const &>()(arg); \
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} \
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/**/
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#define BOOST_PROTO_DEFINE_BINARY_OPERATOR(OP, TAG, TRAIT, DOMAIN) \
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template<typename Left, typename Right> \
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BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \
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typename boost::proto::detail::enable_binary< \
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DOMAIN \
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, DOMAIN::proto_grammar \
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, BOOST_PROTO_APPLY_BINARY_(TRAIT, Left, Right) \
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, TAG \
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, Left & \
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, Right & \
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>::type const \
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operator OP(Left &left, Right &right) \
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{ \
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return boost::proto::detail::make_expr_<TAG, DOMAIN, Left &, Right &>()(left, right); \
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} \
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\
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template<typename Left, typename Right> \
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BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \
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typename boost::proto::detail::enable_binary< \
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DOMAIN \
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, DOMAIN::proto_grammar \
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, BOOST_PROTO_APPLY_BINARY_(TRAIT, Left, Right) \
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, TAG \
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, Left & \
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, Right const & \
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>::type const \
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operator OP(Left &left, Right const &right) \
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{ \
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return boost::proto::detail::make_expr_<TAG, DOMAIN, Left &, Right const &>()(left, right); \
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} \
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\
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template<typename Left, typename Right> \
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BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \
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typename boost::proto::detail::enable_binary< \
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DOMAIN \
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, DOMAIN::proto_grammar \
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, BOOST_PROTO_APPLY_BINARY_(TRAIT, Left, Right) \
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, TAG \
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, Left const & \
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, Right & \
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>::type const \
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operator OP(Left const &left, Right &right) \
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{ \
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return boost::proto::detail::make_expr_<TAG, DOMAIN, Left const &, Right &>()(left, right); \
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} \
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\
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template<typename Left, typename Right> \
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BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \
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typename boost::proto::detail::enable_binary< \
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DOMAIN \
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, DOMAIN::proto_grammar \
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, BOOST_PROTO_APPLY_BINARY_(TRAIT, Left, Right) \
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, TAG \
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, Left const & \
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, Right const & \
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>::type const \
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operator OP(Left const &left, Right const &right) \
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{ \
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return boost::proto::detail::make_expr_<TAG, DOMAIN, Left const &, Right const &>()(left, right);\
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} \
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/**/
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#else
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#define BOOST_PROTO_DEFINE_UNARY_OPERATOR(OP, TAG, TRAIT, DOMAIN, POST) \
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template<typename Arg> \
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BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \
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typename boost::proto::detail::enable_unary< \
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DOMAIN \
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, DOMAIN::proto_grammar \
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, BOOST_PROTO_APPLY_UNARY_(TRAIT, Arg) \
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, TAG \
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, Arg const & \
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>::type const \
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operator OP(Arg &&arg BOOST_PROTO_UNARY_OP_IS_POSTFIX_ ## POST) \
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{ \
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return boost::proto::detail::make_expr_<TAG, DOMAIN, Arg const &>()(arg); \
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} \
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/**/
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#define BOOST_PROTO_DEFINE_BINARY_OPERATOR(OP, TAG, TRAIT, DOMAIN) \
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template<typename Left, typename Right> \
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BOOST_PROTO_DISABLE_MSVC_C4714 BOOST_FORCEINLINE \
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typename boost::proto::detail::enable_binary< \
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DOMAIN \
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, DOMAIN::proto_grammar \
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, BOOST_PROTO_APPLY_BINARY_(TRAIT, Left, Right) \
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, TAG \
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, Left const & \
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, Right const & \
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>::type const \
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operator OP(Left &&left, Right &&right) \
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{ \
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return boost::proto::detail::make_expr_<TAG, DOMAIN, Left const &, Right const &>()(left, right);\
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} \
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/**/
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#endif
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#define BOOST_PROTO_DEFINE_OPERATORS(TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_UNARY_OPERATOR(+, boost::proto::tag::unary_plus, TRAIT, DOMAIN, 0) \
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BOOST_PROTO_DEFINE_UNARY_OPERATOR(-, boost::proto::tag::negate, TRAIT, DOMAIN, 0) \
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BOOST_PROTO_DEFINE_UNARY_OPERATOR(*, boost::proto::tag::dereference, TRAIT, DOMAIN, 0) \
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BOOST_PROTO_DEFINE_UNARY_OPERATOR(~, boost::proto::tag::complement, TRAIT, DOMAIN, 0) \
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BOOST_PROTO_DEFINE_UNARY_OPERATOR(&, boost::proto::tag::address_of, TRAIT, DOMAIN, 0) \
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BOOST_PROTO_DEFINE_UNARY_OPERATOR(!, boost::proto::tag::logical_not, TRAIT, DOMAIN, 0) \
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BOOST_PROTO_DEFINE_UNARY_OPERATOR(++, boost::proto::tag::pre_inc, TRAIT, DOMAIN, 0) \
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BOOST_PROTO_DEFINE_UNARY_OPERATOR(--, boost::proto::tag::pre_dec, TRAIT, DOMAIN, 0) \
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BOOST_PROTO_DEFINE_UNARY_OPERATOR(++, boost::proto::tag::post_inc, TRAIT, DOMAIN, 1) \
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BOOST_PROTO_DEFINE_UNARY_OPERATOR(--, boost::proto::tag::post_dec, TRAIT, DOMAIN, 1) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(<<, boost::proto::tag::shift_left, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(>>, boost::proto::tag::shift_right, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(*, boost::proto::tag::multiplies, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(/, boost::proto::tag::divides, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(%, boost::proto::tag::modulus, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(+, boost::proto::tag::plus, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(-, boost::proto::tag::minus, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(<, boost::proto::tag::less, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(>, boost::proto::tag::greater, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(<=, boost::proto::tag::less_equal, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(>=, boost::proto::tag::greater_equal, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(==, boost::proto::tag::equal_to, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(!=, boost::proto::tag::not_equal_to, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(||, boost::proto::tag::logical_or, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(&&, boost::proto::tag::logical_and, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(&, boost::proto::tag::bitwise_and, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(|, boost::proto::tag::bitwise_or, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(^, boost::proto::tag::bitwise_xor, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(BOOST_PP_COMMA(), boost::proto::tag::comma, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(->*, boost::proto::tag::mem_ptr, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(<<=, boost::proto::tag::shift_left_assign, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(>>=, boost::proto::tag::shift_right_assign, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(*=, boost::proto::tag::multiplies_assign, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(/=, boost::proto::tag::divides_assign, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(%=, boost::proto::tag::modulus_assign, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(+=, boost::proto::tag::plus_assign, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(-=, boost::proto::tag::minus_assign, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(&=, boost::proto::tag::bitwise_and_assign, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(|=, boost::proto::tag::bitwise_or_assign, TRAIT, DOMAIN) \
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BOOST_PROTO_DEFINE_BINARY_OPERATOR(^=, boost::proto::tag::bitwise_xor_assign, TRAIT, DOMAIN) \
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/**/
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// Extensions are a superset of Proto expressions
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template<typename T>
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struct is_extension
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: is_expr<T>
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{};
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template<typename T>
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struct is_extension<T &>
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: is_expr<T>
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{};
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#define BOOST_PROTO_APPLY_UNARY_(TRAIT, ARG) TRAIT<ARG>
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#define BOOST_PROTO_APPLY_BINARY_(TRAIT, LEFT, RIGHT) boost::mpl::or_<TRAIT<LEFT>, TRAIT<RIGHT> >
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namespace exprns_
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{
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// This defines all of Proto's built-in free operator overloads
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BOOST_PROTO_DEFINE_OPERATORS(is_extension, deduce_domain)
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// if_else, for the non-overloadable ternary conditional operator ?:
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template<typename A0, typename A1, typename A2>
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BOOST_FORCEINLINE
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typename result_of::make_expr<
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tag::if_else_
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, deduce_domain
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, A0 const &
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, A1 const &
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, A2 const &
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>::type const
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if_else(A0 const &a0, A1 const &a1, A2 const &a2)
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{
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return proto::detail::make_expr_<
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tag::if_else_
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, deduce_domain
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, A0 const &
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, A1 const &
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, A2 const &
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>()(a0, a1, a2);
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}
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}
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using exprns_::if_else;
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#undef BOOST_PROTO_APPLY_UNARY_
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#undef BOOST_PROTO_APPLY_BINARY_
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// Redefine BOOST_PROTO_APPLY_UNARY_ and BOOST_PROTO_APPLY_BINARY_ so that end users
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// can use BOOST_PROTO_DEFINE_OPERATORS to define Proto operator overloads that work
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// with their own terminal types.
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#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
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#define BOOST_PROTO_APPLY_UNARY_(TRAIT, ARG) \
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boost::mpl::and_< \
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TRAIT<ARG> \
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, boost::mpl::not_<boost::proto::is_extension<ARG> > \
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> \
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/**/
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#define BOOST_PROTO_APPLY_BINARY_(TRAIT, LEFT, RIGHT) \
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boost::mpl::and_< \
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boost::mpl::or_<TRAIT<LEFT>, TRAIT<RIGHT> > \
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, boost::mpl::not_< \
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boost::mpl::or_< \
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boost::proto::is_extension<LEFT> \
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, boost::proto::is_extension<RIGHT> \
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> \
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> \
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> \
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/**/
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#else
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#define BOOST_PROTO_APPLY_UNARY_(TRAIT, ARG) \
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boost::mpl::and_< \
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TRAIT<BOOST_PROTO_UNCVREF(ARG) > \
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, boost::mpl::not_<boost::proto::is_extension<ARG> > \
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> \
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/**/
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#define BOOST_PROTO_APPLY_BINARY_(TRAIT, LEFT, RIGHT) \
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boost::mpl::and_< \
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boost::mpl::or_<TRAIT<BOOST_PROTO_UNCVREF(LEFT) >, TRAIT<BOOST_PROTO_UNCVREF(RIGHT) > > \
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, boost::mpl::not_< \
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boost::mpl::or_< \
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boost::proto::is_extension<LEFT> \
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, boost::proto::is_extension<RIGHT> \
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> \
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> \
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> \
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/**/
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#endif
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}}
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#if defined(_MSC_VER)
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# pragma warning(pop)
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#endif
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#endif
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