operators.hpp

Boost provides free peer-reviewed portable C++ source libraries. We emphasize libraries that work

#define BOOST_PROTO_DEFINE_BINARY_OPERATOR(OP, TAG)                                                 \
    template<typename Left, typename Right>                                                         \
    inline typename detail::as_expr_if<TAG, Left, Right>::type const                                \
    operator OP(Left &left, Right &right)                                                           \
    {                                                                                               \
        return detail::as_expr_if<TAG, Left, Right>::make(left, right);                             \
    }                                                                                               \
    template<typename Left, typename Right>                                                         \
    inline typename detail::as_expr_if<TAG, Left, Right const>::type const                          \
    operator OP(Left &left, Right const &right)                                                     \
    {                                                                                               \
        return detail::as_expr_if<TAG, Left, Right const>::make(left, right);                       \
    }                                                                                               \
    template<typename Left, typename Right>                                                         \
    inline typename detail::as_expr_if<TAG, Left const, Right>::type const                          \
    operator OP(Left const &left, Right &right)                                                     \
    {                                                                                               \
        return detail::as_expr_if<TAG, Left const, Right>::make(left, right);                       \
    }                                                                                               \
    template<typename Left, typename Right>                                                         \
    inline typename detail::as_expr_if<TAG, Left const, Right const>::type const                    \
    operator OP(Left const &left, Right const &right)                                               \
    {                                                                                               \
        return detail::as_expr_if<TAG, Left const, Right const>::make(left, right);                 \
    }                                                                                               \
    /**/

    namespace exprns_
    {
        BOOST_PROTO_DEFINE_UNARY_OPERATOR(+, tag::posit, 0)
        BOOST_PROTO_DEFINE_UNARY_OPERATOR(-, tag::negate, 0)
        BOOST_PROTO_DEFINE_UNARY_OPERATOR(*, tag::dereference, 0)
        BOOST_PROTO_DEFINE_UNARY_OPERATOR(~, tag::complement, 0)
        BOOST_PROTO_DEFINE_UNARY_OPERATOR(&, tag::address_of, 0)
        BOOST_PROTO_DEFINE_UNARY_OPERATOR(!, tag::logical_not, 0)
        BOOST_PROTO_DEFINE_UNARY_OPERATOR(++, tag::pre_inc, 0)
        BOOST_PROTO_DEFINE_UNARY_OPERATOR(--, tag::pre_dec, 0)
        BOOST_PROTO_DEFINE_UNARY_OPERATOR(++, tag::post_inc, 1)
        BOOST_PROTO_DEFINE_UNARY_OPERATOR(--, tag::post_dec, 1)

        BOOST_PROTO_DEFINE_BINARY_OPERATOR(<<, tag::shift_left)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(>>, tag::shift_right)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(*, tag::multiplies)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(/, tag::divides)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(%, tag::modulus)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(+, tag::plus)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(-, tag::minus)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(<, tag::less)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(>, tag::greater)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(<=, tag::less_equal)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(>=, tag::greater_equal)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(==, tag::equal_to)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(!=, tag::not_equal_to)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(||, tag::logical_or)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(&&, tag::logical_and)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(&, tag::bitwise_and)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(|, tag::bitwise_or)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(^, tag::bitwise_xor)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(BOOST_PP_COMMA(), tag::comma)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(->*, tag::mem_ptr)

        BOOST_PROTO_DEFINE_BINARY_OPERATOR(<<=, tag::shift_left_assign)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(>>=, tag::shift_right_assign)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(*=, tag::multiplies_assign)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(/=, tag::divides_assign)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(%=, tag::modulus_assign)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(+=, tag::plus_assign)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(-=, tag::minus_assign)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(&=, tag::bitwise_and_assign)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(|=, tag::bitwise_or_assign)
        BOOST_PROTO_DEFINE_BINARY_OPERATOR(^=, tag::bitwise_xor_assign)

        /// if_else
        ///
        BOOST_PROTO_DEFINE_FUNCTION_TEMPLATE(
            3
          , if_else
          , deduce_domain
          , (tag::if_else_)
          , BOOST_PP_SEQ_NIL
        )
    } // exprns_

    using exprns_::if_else;

#undef BOOST_PROTO_DEFINE_UNARY_OPERATOR
#undef BOOST_PROTO_DEFINE_BINARY_OPERATOR

#define BOOST_PROTO_DEFINE_UNARY_OPERATOR(OP, TAG, TRAIT, DOMAIN, POST)                             \
    template<typename Arg>                                                                          \
    typename boost::proto::detail::enable_unary<DOMAIN, TRAIT<Arg>, Arg                             \
        , typename boost::proto::result_of::make_expr<TAG, DOMAIN, Arg &>::type                     \
    >::type const                                                                                   \
    operator OP(Arg &arg BOOST_PROTO_UNARY_OP_IS_POSTFIX_ ## POST)                                  \
    {                                                                                               \
        return boost::proto::make_expr<TAG, DOMAIN>(boost::ref(arg));                               \
    }                                                                                               \
    template<typename Arg>                                                                          \
    typename boost::proto::detail::enable_unary<DOMAIN, TRAIT<Arg>, Arg                             \
        , typename boost::proto::result_of::make_expr<TAG, DOMAIN, Arg const &>::type               \
    >::type const                                                                                   \
    operator OP(Arg const &arg BOOST_PROTO_UNARY_OP_IS_POSTFIX_ ## POST)                            \
    {                                                                                               \
        return boost::proto::make_expr<TAG, DOMAIN>(boost::ref(arg));                               \
    }                                                                                               \
    /**/

#define BOOST_PROTO_DEFINE_BINARY_OPERATOR(OP, TAG, TRAIT, DOMAIN)                                  \
    template<typename Left, typename Right>                                                         \
    typename boost::proto::detail::enable_binary<DOMAIN, TRAIT<Left>, Left, TRAIT<Right>, Right     \
        , typename boost::proto::result_of::make_expr<TAG, DOMAIN, Left &, Right &>::type           \
    >::type const                                                                                   \
    operator OP(Left &left, Right &right)                                                           \
    {                                                                                               \
        return boost::proto::make_expr<TAG, DOMAIN>(boost::ref(left), boost::ref(right));           \
    }                                                                                               \
    template<typename Left, typename Right>                                                         \
    typename boost::proto::detail::enable_binary<DOMAIN, TRAIT<Left>, Left, TRAIT<Right>, Right     \
        , typename boost::proto::result_of::make_expr<TAG, DOMAIN, Left &, Right const &>::type     \
    >::type const                                                                                   \
    operator OP(Left &left, Right const &right)                                                     \
    {                                                                                               \
        return boost::proto::make_expr<TAG, DOMAIN>(boost::ref(left), boost::ref(right));           \
    }                                                                                               \
    template<typename Left, typename Right>                                                         \
    typename boost::proto::detail::enable_binary<DOMAIN, TRAIT<Left>, Left, TRAIT<Right>, Right     \
        , typename boost::proto::result_of::make_expr<TAG, DOMAIN, Left const &, Right &>::type     \
    >::type const                                                                                   \
    operator OP(Left const &left, Right &right)                                                     \
    {                                                                                               \
        return boost::proto::make_expr<TAG, DOMAIN>(boost::ref(left), boost::ref(right));           \
    }                                                                                               \
    template<typename Left, typename Right>                                                         \
    typename boost::proto::detail::enable_binary<DOMAIN, TRAIT<Left>, Left, TRAIT<Right>, Right     \
        , typename boost::proto::result_of::make_expr<TAG, DOMAIN, Left const &, Right const &>::type\
    >::type const                                                                                   \
    operator OP(Left const &left, Right const &right)                                               \
    {                                                                                               \
        return boost::proto::make_expr<TAG, DOMAIN>(boost::ref(left), boost::ref(right));           \
    }                                                                                               \
    /**/

#define BOOST_PROTO_DEFINE_OPERATORS(TRAIT, DOMAIN)                                                 \
    BOOST_PROTO_DEFINE_UNARY_OPERATOR(+, boost::proto::tag::posit, TRAIT, DOMAIN, 0)                \
    BOOST_PROTO_DEFINE_UNARY_OPERATOR(-, boost::proto::tag::negate, TRAIT, DOMAIN, 0)               \
    BOOST_PROTO_DEFINE_UNARY_OPERATOR(*, boost::proto::tag::dereference, TRAIT, DOMAIN, 0)          \
    BOOST_PROTO_DEFINE_UNARY_OPERATOR(~, boost::proto::tag::complement, TRAIT, DOMAIN, 0)           \
    BOOST_PROTO_DEFINE_UNARY_OPERATOR(&, boost::proto::tag::address_of, TRAIT, DOMAIN, 0)           \
    BOOST_PROTO_DEFINE_UNARY_OPERATOR(!, boost::proto::tag::logical_not, TRAIT, DOMAIN, 0)          \
    BOOST_PROTO_DEFINE_UNARY_OPERATOR(++, boost::proto::tag::pre_inc, TRAIT, DOMAIN, 0)             \
    BOOST_PROTO_DEFINE_UNARY_OPERATOR(--, boost::proto::tag::pre_dec, TRAIT, DOMAIN, 0)             \
    BOOST_PROTO_DEFINE_UNARY_OPERATOR(++, boost::proto::tag::post_inc, TRAIT, DOMAIN, 1)            \
    BOOST_PROTO_DEFINE_UNARY_OPERATOR(--, boost::proto::tag::post_dec, TRAIT, DOMAIN, 1)            \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(<<, boost::proto::tag::shift_left, TRAIT, DOMAIN)            \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(>>, boost::proto::tag::shift_right, TRAIT, DOMAIN)           \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(*, boost::proto::tag::multiplies, TRAIT, DOMAIN)             \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(/, boost::proto::tag::divides, TRAIT, DOMAIN)                \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(%, boost::proto::tag::modulus, TRAIT, DOMAIN)                \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(+, boost::proto::tag::plus, TRAIT, DOMAIN)                   \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(-, boost::proto::tag::minus, TRAIT, DOMAIN)                  \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(<, boost::proto::tag::less, TRAIT, DOMAIN)                   \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(>, boost::proto::tag::greater, TRAIT, DOMAIN)                \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(<=, boost::proto::tag::less_equal, TRAIT, DOMAIN)            \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(>=, boost::proto::tag::greater_equal, TRAIT, DOMAIN)         \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(==, boost::proto::tag::equal_to, TRAIT, DOMAIN)              \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(!=, boost::proto::tag::not_equal_to, TRAIT, DOMAIN)          \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(||, boost::proto::tag::logical_or, TRAIT, DOMAIN)            \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(&&, boost::proto::tag::logical_and, TRAIT, DOMAIN)           \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(&, boost::proto::tag::bitwise_and, TRAIT, DOMAIN)            \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(|, boost::proto::tag::bitwise_or, TRAIT, DOMAIN)             \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(^, boost::proto::tag::bitwise_xor, TRAIT, DOMAIN)            \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(BOOST_PP_COMMA(), boost::proto::tag::comma, TRAIT, DOMAIN)   \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(->*, boost::proto::tag::mem_ptr, TRAIT, DOMAIN)              \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(<<=, boost::proto::tag::shift_left_assign, TRAIT, DOMAIN)    \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(>>=, boost::proto::tag::shift_right_assign, TRAIT, DOMAIN)   \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(*=, boost::proto::tag::multiplies_assign, TRAIT, DOMAIN)     \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(/=, boost::proto::tag::divides_assign, TRAIT, DOMAIN)        \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(%=, boost::proto::tag::modulus_assign, TRAIT, DOMAIN)        \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(+=, boost::proto::tag::plus_assign, TRAIT, DOMAIN)           \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(-=, boost::proto::tag::minus_assign, TRAIT, DOMAIN)          \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(&=, boost::proto::tag::bitwise_and_assign, TRAIT, DOMAIN)    \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(|=, boost::proto::tag::bitwise_or_assign, TRAIT, DOMAIN)     \
    BOOST_PROTO_DEFINE_BINARY_OPERATOR(^=, boost::proto::tag::bitwise_xor_assign, TRAIT, DOMAIN)    \
    /**/

    template<typename T>
    struct is_extension
      : mpl::false_
    {};

    #ifndef BOOST_PROTO_DOXYGEN_INVOKED
    namespace exops
    {
        BOOST_PROTO_DEFINE_OPERATORS(is_extension, default_domain)
        using proto::if_else;
    }
    #endif

}}

#endif