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Diffstat (limited to '3rdParty/Boost/src/boost/proto/traits.hpp')
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diff --git a/3rdParty/Boost/src/boost/proto/traits.hpp b/3rdParty/Boost/src/boost/proto/traits.hpp new file mode 100644 index 0000000..cf9f091 --- /dev/null +++ b/3rdParty/Boost/src/boost/proto/traits.hpp @@ -0,0 +1,1258 @@ +/////////////////////////////////////////////////////////////////////////////// +/// \file traits.hpp +/// Contains definitions for child\<\>, child_c\<\>, left\<\>, +/// right\<\>, tag_of\<\>, and the helper functions child(), child_c(), +/// value(), left() and right(). +// +// 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_ARG_TRAITS_HPP_EAN_04_01_2005 +#define BOOST_PROTO_ARG_TRAITS_HPP_EAN_04_01_2005 + +#include <boost/config.hpp> +#include <boost/detail/workaround.hpp> +#include <boost/preprocessor/iteration/iterate.hpp> +#include <boost/preprocessor/repetition/enum.hpp> +#include <boost/preprocessor/repetition/enum_params.hpp> +#include <boost/preprocessor/repetition/enum_trailing_params.hpp> +#include <boost/preprocessor/repetition/repeat.hpp> +#include <boost/preprocessor/repetition/repeat_from_to.hpp> +#include <boost/preprocessor/facilities/intercept.hpp> +#include <boost/preprocessor/arithmetic/sub.hpp> +#include <boost/static_assert.hpp> +#include <boost/mpl/bool.hpp> +#include <boost/proto/detail/template_arity.hpp> +#include <boost/type_traits/is_pod.hpp> +#include <boost/type_traits/is_same.hpp> +#include <boost/type_traits/add_const.hpp> +#include <boost/proto/proto_fwd.hpp> +#include <boost/proto/args.hpp> +#include <boost/proto/domain.hpp> +#include <boost/proto/transform/pass_through.hpp> + +#if defined(_MSC_VER) && (_MSC_VER >= 1020) +# pragma warning(push) +# if BOOST_WORKAROUND( BOOST_MSVC, >= 1400 ) +# pragma warning(disable: 4180) // warning C4180: qualifier applied to function type has no meaning; ignored +# endif +# pragma warning(disable : 4714) // function 'xxx' marked as __forceinline not inlined +#endif + +namespace boost { namespace proto +{ + namespace detail + { + template<typename T, typename Void = void> + struct if_vararg + {}; + + template<typename T> + struct if_vararg<T, typename T::proto_is_vararg_> + : T + {}; + + template<typename T, typename Void = void> + struct is_callable2_ + : mpl::false_ + {}; + + template<typename T> + struct is_callable2_<T, typename T::proto_is_callable_> + : mpl::true_ + {}; + + template<typename T BOOST_PROTO_TEMPLATE_ARITY_PARAM(long Arity = boost::proto::detail::template_arity<T>::value)> + struct is_callable_ + : is_callable2_<T> + {}; + + } + + /// \brief Boolean metafunction which detects whether a type is + /// a callable function object type or not. + /// + /// <tt>is_callable\<\></tt> is used by the <tt>when\<\></tt> transform + /// to determine whether a function type <tt>R(A1,A2,...AN)</tt> is a + /// callable transform or an object transform. (The former are evaluated + /// using <tt>call\<\></tt> and the later with <tt>make\<\></tt>.) If + /// <tt>is_callable\<R\>::value</tt> is \c true, the function type is + /// a callable transform; otherwise, it is an object transform. + /// + /// Unless specialized for a type \c T, <tt>is_callable\<T\>::value</tt> + /// is computed as follows: + /// + /// \li If \c T is a template type <tt>X\<Y0,Y1,...YN\></tt>, where all \c Yx + /// are types for \c x in <tt>[0,N]</tt>, <tt>is_callable\<T\>::value</tt> + /// is <tt>is_same\<YN, proto::callable\>::value</tt>. + /// \li If \c T has a nested type \c proto_is_callable_ that is a typedef + /// for \c void, <tt>is_callable\<T\>::value</tt> is \c true. (Note: this is + /// the case for any type that derives from \c proto::callable.) + /// \li Otherwise, <tt>is_callable\<T\>::value</tt> is \c false. + template<typename T> + struct is_callable + : proto::detail::is_callable_<T> + {}; + + /// INTERNAL ONLY + /// + template<> + struct is_callable<proto::_> + : mpl::true_ + {}; + + /// INTERNAL ONLY + /// + template<> + struct is_callable<proto::callable> + : mpl::false_ + {}; + + /// INTERNAL ONLY + /// + template<typename PrimitiveTransform, typename X> + struct is_callable<proto::transform<PrimitiveTransform, X> > + : mpl::false_ + {}; + + #if BOOST_WORKAROUND(__GNUC__, == 3) || (BOOST_WORKAROUND(__GNUC__, == 4) && __GNUC_MINOR__ == 0) + // work around GCC bug + template<typename Tag, typename Args, long N> + struct is_callable<proto::expr<Tag, Args, N> > + : mpl::false_ + {}; + + // work around GCC bug + template<typename Tag, typename Args, long N> + struct is_callable<proto::basic_expr<Tag, Args, N> > + : mpl::false_ + {}; + #endif + + namespace detail + { + template<typename T, typename Void /*= void*/> + struct is_transform_ + : mpl::false_ + {}; + + template<typename T> + struct is_transform_<T, typename T::proto_is_transform_> + : mpl::true_ + {}; + } + + /// \brief Boolean metafunction which detects whether a type is + /// a PrimitiveTransform type or not. + /// + /// <tt>is_transform\<\></tt> is used by the <tt>call\<\></tt> transform + /// to determine whether the function types <tt>R()</tt>, <tt>R(A1)</tt>, + /// and <tt>R(A1, A2)</tt> should be passed the expression, state and data + /// parameters (as needed). + /// + /// Unless specialized for a type \c T, <tt>is_transform\<T\>::value</tt> + /// is computed as follows: + /// + /// \li If \c T has a nested type \c proto_is_transform_ that is a typedef + /// for \c void, <tt>is_transform\<T\>::value</tt> is \c true. (Note: this is + /// the case for any type that derives from an instantiation of \c proto::transform.) + /// \li Otherwise, <tt>is_transform\<T\>::value</tt> is \c false. + template<typename T> + struct is_transform + : proto::detail::is_transform_<T> + {}; + + namespace detail + { + template<typename T, typename Void /*= void*/> + struct is_aggregate_ + : is_pod<T> + {}; + + template<typename Tag, typename Args, long N> + struct is_aggregate_<proto::expr<Tag, Args, N>, void> + : mpl::true_ + {}; + + template<typename Tag, typename Args, long N> + struct is_aggregate_<proto::basic_expr<Tag, Args, N>, void> + : mpl::true_ + {}; + + template<typename T> + struct is_aggregate_<T, typename T::proto_is_aggregate_> + : mpl::true_ + {}; + } + + /// \brief A Boolean metafunction that indicates whether a type requires + /// aggregate initialization. + /// + /// <tt>is_aggregate\<\></tt> is used by the <tt>make\<\></tt> transform + /// to determine how to construct an object of some type \c T, given some + /// initialization arguments <tt>a0,a1,...aN</tt>. + /// If <tt>is_aggregate\<T\>::value</tt> is \c true, then an object of + /// type T will be initialized as <tt>T t = {a0,a1,...aN};</tt>. Otherwise, + /// it will be initialized as <tt>T t(a0,a1,...aN)</tt>. + template<typename T> + struct is_aggregate + : proto::detail::is_aggregate_<T> + {}; + + /// \brief A Boolean metafunction that indicates whether a given + /// type \c T is a Proto expression type. + /// + /// If \c T has a nested type \c proto_is_expr_ that is a typedef + /// for \c void, <tt>is_expr\<T\>::value</tt> is \c true. (Note, this + /// is the case for <tt>proto::expr\<\></tt>, any type that is derived + /// from <tt>proto::extends\<\></tt> or that uses the + /// <tt>BOOST_PROTO_BASIC_EXTENDS()</tt> macro.) Otherwise, + /// <tt>is_expr\<T\>::value</tt> is \c false. + template<typename T, typename Void /* = void*/> + struct is_expr + : mpl::false_ + {}; + + /// \brief A Boolean metafunction that indicates whether a given + /// type \c T is a Proto expression type. + /// + /// If \c T has a nested type \c proto_is_expr_ that is a typedef + /// for \c void, <tt>is_expr\<T\>::value</tt> is \c true. (Note, this + /// is the case for <tt>proto::expr\<\></tt>, any type that is derived + /// from <tt>proto::extends\<\></tt> or that uses the + /// <tt>BOOST_PROTO_BASIC_EXTENDS()</tt> macro.) Otherwise, + /// <tt>is_expr\<T\>::value</tt> is \c false. + template<typename T> + struct is_expr<T, typename T::proto_is_expr_> + : mpl::true_ + {}; + + template<typename T> + struct is_expr<T &, void> + : is_expr<T> + {}; + + /// \brief A metafunction that returns the tag type of a + /// Proto expression. + template<typename Expr> + struct tag_of + { + typedef typename Expr::proto_tag type; + }; + + template<typename Expr> + struct tag_of<Expr &> + { + typedef typename Expr::proto_tag type; + }; + + /// \brief A metafunction that returns the arity of a + /// Proto expression. + template<typename Expr> + struct arity_of + : Expr::proto_arity + {}; + + template<typename Expr> + struct arity_of<Expr &> + : Expr::proto_arity + {}; + + namespace result_of + { + /// \brief A metafunction that computes the return type of the \c as_expr() + /// function. + template<typename T, typename Domain /*= default_domain*/> + struct as_expr + { + typedef typename Domain::template as_expr<T>::result_type type; + }; + + /// \brief A metafunction that computes the return type of the \c as_child() + /// function. + template<typename T, typename Domain /*= default_domain*/> + struct as_child + { + typedef typename Domain::template as_child<T>::result_type type; + }; + + /// \brief A metafunction that returns the type of the Nth child + /// of a Proto expression, where N is an MPL Integral Constant. + /// + /// <tt>result_of::child\<Expr, N\></tt> is equivalent to + /// <tt>result_of::child_c\<Expr, N::value\></tt>. + template<typename Expr, typename N /* = mpl::long_<0>*/> + struct child + : child_c<Expr, N::value> + {}; + + /// \brief A metafunction that returns the type of the value + /// of a terminal Proto expression. + /// + template<typename Expr> + struct value + { + /// Verify that we are actually operating on a terminal + BOOST_STATIC_ASSERT(0 == Expr::proto_arity_c); + + /// The raw type of the Nth child as it is stored within + /// \c Expr. This may be a value or a reference + typedef typename Expr::proto_child0 value_type; + + /// The "value" type of the child, suitable for storage by value, + /// computed as follows: + /// \li <tt>T const(&)[N]</tt> becomes <tt>T[N]</tt> + /// \li <tt>T[N]</tt> becomes <tt>T[N]</tt> + /// \li <tt>T(&)[N]</tt> becomes <tt>T[N]</tt> + /// \li <tt>R(&)(A0,...)</tt> becomes <tt>R(&)(A0,...)</tt> + /// \li <tt>T const &</tt> becomes <tt>T</tt> + /// \li <tt>T &</tt> becomes <tt>T</tt> + /// \li <tt>T</tt> becomes <tt>T</tt> + typedef typename detail::term_traits<typename Expr::proto_child0>::value_type type; + }; + + template<typename Expr> + struct value<Expr &> + { + /// Verify that we are actually operating on a terminal + BOOST_STATIC_ASSERT(0 == Expr::proto_arity_c); + + /// The raw type of the Nth child as it is stored within + /// \c Expr. This may be a value or a reference + typedef typename Expr::proto_child0 value_type; + + /// The "reference" type of the child, suitable for storage by + /// reference, computed as follows: + /// \li <tt>T const(&)[N]</tt> becomes <tt>T const(&)[N]</tt> + /// \li <tt>T[N]</tt> becomes <tt>T(&)[N]</tt> + /// \li <tt>T(&)[N]</tt> becomes <tt>T(&)[N]</tt> + /// \li <tt>R(&)(A0,...)</tt> becomes <tt>R(&)(A0,...)</tt> + /// \li <tt>T const &</tt> becomes <tt>T const &</tt> + /// \li <tt>T &</tt> becomes <tt>T &</tt> + /// \li <tt>T</tt> becomes <tt>T &</tt> + typedef typename detail::term_traits<typename Expr::proto_child0>::reference type; + }; + + template<typename Expr> + struct value<Expr const &> + { + /// Verify that we are actually operating on a terminal + BOOST_STATIC_ASSERT(0 == Expr::proto_arity_c); + + /// The raw type of the Nth child as it is stored within + /// \c Expr. This may be a value or a reference + typedef typename Expr::proto_child0 value_type; + + /// The "const reference" type of the child, suitable for storage by + /// const reference, computed as follows: + /// \li <tt>T const(&)[N]</tt> becomes <tt>T const(&)[N]</tt> + /// \li <tt>T[N]</tt> becomes <tt>T const(&)[N]</tt> + /// \li <tt>T(&)[N]</tt> becomes <tt>T(&)[N]</tt> + /// \li <tt>R(&)(A0,...)</tt> becomes <tt>R(&)(A0,...)</tt> + /// \li <tt>T const &</tt> becomes <tt>T const &</tt> + /// \li <tt>T &</tt> becomes <tt>T &</tt> + /// \li <tt>T</tt> becomes <tt>T const &</tt> + typedef typename detail::term_traits<typename Expr::proto_child0>::const_reference type; + }; + + /// \brief A metafunction that returns the type of the left child + /// of a binary Proto expression. + /// + /// <tt>result_of::left\<Expr\></tt> is equivalent to + /// <tt>result_of::child_c\<Expr, 0\></tt>. + template<typename Expr> + struct left + : child_c<Expr, 0> + {}; + + /// \brief A metafunction that returns the type of the right child + /// of a binary Proto expression. + /// + /// <tt>result_of::right\<Expr\></tt> is equivalent to + /// <tt>result_of::child_c\<Expr, 1\></tt>. + template<typename Expr> + struct right + : child_c<Expr, 1> + {}; + + } // namespace result_of + + /// \brief A metafunction for generating terminal expression types, + /// a grammar element for matching terminal expressions, and a + /// PrimitiveTransform that returns the current expression unchanged. + template<typename T> + struct terminal + : proto::transform<terminal<T>, int> + { + typedef proto::expr<proto::tag::terminal, term<T>, 0> type; + typedef proto::basic_expr<proto::tag::terminal, term<T>, 0> proto_grammar; + + template<typename Expr, typename State, typename Data> + struct impl : transform_impl<Expr, State, Data> + { + typedef Expr result_type; + + /// \param e The current expression + /// \pre <tt>matches\<Expr, terminal\<T\> \>::value</tt> is \c true. + /// \return \c e + /// \throw nothrow + BOOST_FORCEINLINE + BOOST_PROTO_RETURN_TYPE_STRICT_LOOSE(result_type, typename impl::expr_param) + operator ()( + typename impl::expr_param e + , typename impl::state_param + , typename impl::data_param + ) const + { + return e; + } + }; + + /// INTERNAL ONLY + typedef proto::tag::terminal proto_tag; + /// INTERNAL ONLY + typedef T proto_child0; + }; + + /// \brief A metafunction for generating ternary conditional expression types, + /// a grammar element for matching ternary conditional expressions, and a + /// PrimitiveTransform that dispatches to the <tt>pass_through\<\></tt> + /// transform. + template<typename T, typename U, typename V> + struct if_else_ + : proto::transform<if_else_<T, U, V>, int> + { + typedef proto::expr<proto::tag::if_else_, list3<T, U, V>, 3> type; + typedef proto::basic_expr<proto::tag::if_else_, list3<T, U, V>, 3> proto_grammar; + + template<typename Expr, typename State, typename Data> + struct impl + : detail::pass_through_impl<if_else_, deduce_domain, Expr, State, Data> + {}; + + /// INTERNAL ONLY + typedef proto::tag::if_else_ proto_tag; + /// INTERNAL ONLY + typedef T proto_child0; + /// INTERNAL ONLY + typedef U proto_child1; + /// INTERNAL ONLY + typedef V proto_child2; + }; + + /// \brief A metafunction for generating nullary expression types with a + /// specified tag type, + /// a grammar element for matching nullary expressions, and a + /// PrimitiveTransform that returns the current expression unchanged. + /// + /// Use <tt>nullary_expr\<_, _\></tt> as a grammar element to match any + /// nullary expression. + template<typename Tag, typename T> + struct nullary_expr + : proto::transform<nullary_expr<Tag, T>, int> + { + typedef proto::expr<Tag, term<T>, 0> type; + typedef proto::basic_expr<Tag, term<T>, 0> proto_grammar; + + template<typename Expr, typename State, typename Data> + struct impl : transform_impl<Expr, State, Data> + { + typedef Expr result_type; + + /// \param e The current expression + /// \pre <tt>matches\<Expr, nullary_expr\<Tag, T\> \>::value</tt> is \c true. + /// \return \c e + /// \throw nothrow + BOOST_FORCEINLINE + BOOST_PROTO_RETURN_TYPE_STRICT_LOOSE(result_type, typename impl::expr_param) + operator ()( + typename impl::expr_param e + , typename impl::state_param + , typename impl::data_param + ) const + { + return e; + } + }; + + /// INTERNAL ONLY + typedef Tag proto_tag; + /// INTERNAL ONLY + typedef T proto_child0; + }; + + /// \brief A metafunction for generating unary expression types with a + /// specified tag type, + /// a grammar element for matching unary expressions, and a + /// PrimitiveTransform that dispatches to the <tt>pass_through\<\></tt> + /// transform. + /// + /// Use <tt>unary_expr\<_, _\></tt> as a grammar element to match any + /// unary expression. + template<typename Tag, typename T> + struct unary_expr + : proto::transform<unary_expr<Tag, T>, int> + { + typedef proto::expr<Tag, list1<T>, 1> type; + typedef proto::basic_expr<Tag, list1<T>, 1> proto_grammar; + + template<typename Expr, typename State, typename Data> + struct impl + : detail::pass_through_impl<unary_expr, deduce_domain, Expr, State, Data> + {}; + + /// INTERNAL ONLY + typedef Tag proto_tag; + /// INTERNAL ONLY + typedef T proto_child0; + }; + + /// \brief A metafunction for generating binary expression types with a + /// specified tag type, + /// a grammar element for matching binary expressions, and a + /// PrimitiveTransform that dispatches to the <tt>pass_through\<\></tt> + /// transform. + /// + /// Use <tt>binary_expr\<_, _, _\></tt> as a grammar element to match any + /// binary expression. + template<typename Tag, typename T, typename U> + struct binary_expr + : proto::transform<binary_expr<Tag, T, U>, int> + { + typedef proto::expr<Tag, list2<T, U>, 2> type; + typedef proto::basic_expr<Tag, list2<T, U>, 2> proto_grammar; + + template<typename Expr, typename State, typename Data> + struct impl + : detail::pass_through_impl<binary_expr, deduce_domain, Expr, State, Data> + {}; + + /// INTERNAL ONLY + typedef Tag proto_tag; + /// INTERNAL ONLY + typedef T proto_child0; + /// INTERNAL ONLY + typedef U proto_child1; + }; + +#define BOOST_PROTO_DEFINE_UNARY_METAFUNCTION(Op) \ + template<typename T> \ + struct Op \ + : proto::transform<Op<T>, int> \ + { \ + typedef proto::expr<proto::tag::Op, list1<T>, 1> type; \ + typedef proto::basic_expr<proto::tag::Op, list1<T>, 1> proto_grammar; \ + \ + template<typename Expr, typename State, typename Data> \ + struct impl \ + : detail::pass_through_impl<Op, deduce_domain, Expr, State, Data> \ + {}; \ + \ + typedef proto::tag::Op proto_tag; \ + typedef T proto_child0; \ + }; \ + /**/ + +#define BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(Op) \ + template<typename T, typename U> \ + struct Op \ + : proto::transform<Op<T, U>, int> \ + { \ + typedef proto::expr<proto::tag::Op, list2<T, U>, 2> type; \ + typedef proto::basic_expr<proto::tag::Op, list2<T, U>, 2> proto_grammar; \ + \ + template<typename Expr, typename State, typename Data> \ + struct impl \ + : detail::pass_through_impl<Op, deduce_domain, Expr, State, Data> \ + {}; \ + \ + typedef proto::tag::Op proto_tag; \ + typedef T proto_child0; \ + typedef U proto_child1; \ + }; \ + /**/ + + BOOST_PROTO_DEFINE_UNARY_METAFUNCTION(unary_plus) + BOOST_PROTO_DEFINE_UNARY_METAFUNCTION(negate) + BOOST_PROTO_DEFINE_UNARY_METAFUNCTION(dereference) + BOOST_PROTO_DEFINE_UNARY_METAFUNCTION(complement) + BOOST_PROTO_DEFINE_UNARY_METAFUNCTION(address_of) + BOOST_PROTO_DEFINE_UNARY_METAFUNCTION(logical_not) + BOOST_PROTO_DEFINE_UNARY_METAFUNCTION(pre_inc) + BOOST_PROTO_DEFINE_UNARY_METAFUNCTION(pre_dec) + BOOST_PROTO_DEFINE_UNARY_METAFUNCTION(post_inc) + BOOST_PROTO_DEFINE_UNARY_METAFUNCTION(post_dec) + + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(shift_left) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(shift_right) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(multiplies) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(divides) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(modulus) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(plus) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(minus) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(less) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(greater) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(less_equal) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(greater_equal) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(equal_to) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(not_equal_to) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(logical_or) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(logical_and) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(bitwise_or) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(bitwise_and) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(bitwise_xor) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(comma) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(mem_ptr) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(assign) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(shift_left_assign) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(shift_right_assign) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(multiplies_assign) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(divides_assign) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(modulus_assign) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(plus_assign) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(minus_assign) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(bitwise_or_assign) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(bitwise_and_assign) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(bitwise_xor_assign) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(subscript) + BOOST_PROTO_DEFINE_BINARY_METAFUNCTION(member) + + #undef BOOST_PROTO_DEFINE_UNARY_METAFUNCTION + #undef BOOST_PROTO_DEFINE_BINARY_METAFUNCTION + + #include <boost/proto/detail/traits.hpp> + + namespace functional + { + /// \brief A callable PolymorphicFunctionObject that is + /// equivalent to the \c as_expr() function. + template<typename Domain /* = default_domain*/> + struct as_expr + { + BOOST_PROTO_CALLABLE() + + template<typename Sig> + struct result; + + template<typename This, typename T> + struct result<This(T)> + { + typedef typename Domain::template as_expr<T>::result_type type; + }; + + template<typename This, typename T> + struct result<This(T &)> + { + typedef typename Domain::template as_expr<T>::result_type type; + }; + + /// \brief Wrap an object in a Proto terminal if it isn't a + /// Proto expression already. + /// \param t The object to wrap. + /// \return <tt>proto::as_expr\<Domain\>(t)</tt> + template<typename T> + BOOST_FORCEINLINE + typename add_const<typename result<as_expr(T &)>::type>::type + operator ()(T &t) const + { + return typename Domain::template as_expr<T>()(t); + } + + /// \overload + /// + template<typename T> + BOOST_FORCEINLINE + typename add_const<typename result<as_expr(T const &)>::type>::type + operator ()(T const &t) const + { + return typename Domain::template as_expr<T const>()(t); + } + + #if BOOST_WORKAROUND(BOOST_MSVC, == 1310) + template<typename T, std::size_t N_> + BOOST_FORCEINLINE + typename add_const<typename result<as_expr(T (&)[N_])>::type>::type + operator ()(T (&t)[N_]) const + { + return typename Domain::template as_expr<T[N_]>()(t); + } + + template<typename T, std::size_t N_> + BOOST_FORCEINLINE + typename add_const<typename result<as_expr(T const (&)[N_])>::type>::type + operator ()(T const (&t)[N_]) const + { + return typename Domain::template as_expr<T const[N_]>()(t); + } + #endif + }; + + /// \brief A callable PolymorphicFunctionObject that is + /// equivalent to the \c as_child() function. + template<typename Domain /* = default_domain*/> + struct as_child + { + BOOST_PROTO_CALLABLE() + + template<typename Sig> + struct result; + + template<typename This, typename T> + struct result<This(T)> + { + typedef typename Domain::template as_child<T>::result_type type; + }; + + template<typename This, typename T> + struct result<This(T &)> + { + typedef typename Domain::template as_child<T>::result_type type; + }; + + /// \brief Wrap an object in a Proto terminal if it isn't a + /// Proto expression already. + /// \param t The object to wrap. + /// \return <tt>proto::as_child\<Domain\>(t)</tt> + template<typename T> + BOOST_FORCEINLINE + typename add_const<typename result<as_child(T &)>::type>::type + operator ()(T &t) const + { + return typename Domain::template as_child<T>()(t); + } + + /// \overload + /// + template<typename T> + BOOST_FORCEINLINE + typename add_const<typename result<as_child(T const &)>::type>::type + operator ()(T const &t) const + { + return typename Domain::template as_child<T const>()(t); + } + }; + + /// \brief A callable PolymorphicFunctionObject that is + /// equivalent to the \c child_c() function. + template<long N> + struct child_c + { + BOOST_PROTO_CALLABLE() + + template<typename Sig> + struct result; + + template<typename This, typename Expr> + struct result<This(Expr)> + { + typedef typename result_of::child_c<Expr, N>::type type; + }; + + /// \brief Return the Nth child of the given expression. + /// \param expr The expression node. + /// \pre <tt>is_expr\<Expr\>::value</tt> is \c true + /// \pre <tt>N \< Expr::proto_arity::value</tt> + /// \return <tt>proto::child_c\<N\>(expr)</tt> + /// \throw nothrow + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::child_c<Expr &, N>::type + operator ()(Expr &e) const + { + return result_of::child_c<Expr &, N>::call(e); + } + + /// \overload + /// + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::child_c<Expr const &, N>::type + operator ()(Expr const &e) const + { + return result_of::child_c<Expr const &, N>::call(e); + } + }; + + /// \brief A callable PolymorphicFunctionObject that is + /// equivalent to the \c child() function. + /// + /// A callable PolymorphicFunctionObject that is + /// equivalent to the \c child() function. \c N is required + /// to be an MPL Integral Constant. + template<typename N /* = mpl::long_<0>*/> + struct child + { + BOOST_PROTO_CALLABLE() + + template<typename Sig> + struct result; + + template<typename This, typename Expr> + struct result<This(Expr)> + { + typedef typename result_of::child<Expr, N>::type type; + }; + + /// \brief Return the Nth child of the given expression. + /// \param expr The expression node. + /// \pre <tt>is_expr\<Expr\>::value</tt> is \c true + /// \pre <tt>N::value \< Expr::proto_arity::value</tt> + /// \return <tt>proto::child\<N\>(expr)</tt> + /// \throw nothrow + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::child<Expr &, N>::type + operator ()(Expr &e) const + { + return result_of::child<Expr &, N>::call(e); + } + + /// \overload + /// + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::child<Expr const &, N>::type + operator ()(Expr const &e) const + { + return result_of::child<Expr const &, N>::call(e); + } + }; + + /// \brief A callable PolymorphicFunctionObject that is + /// equivalent to the \c value() function. + struct value + { + BOOST_PROTO_CALLABLE() + + template<typename Sig> + struct result; + + template<typename This, typename Expr> + struct result<This(Expr)> + { + typedef typename result_of::value<Expr>::type type; + }; + + /// \brief Return the value of the given terminal expression. + /// \param expr The terminal expression node. + /// \pre <tt>is_expr\<Expr\>::value</tt> is \c true + /// \pre <tt>0 == Expr::proto_arity::value</tt> + /// \return <tt>proto::value(expr)</tt> + /// \throw nothrow + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::value<Expr &>::type + operator ()(Expr &e) const + { + return e.proto_base().child0; + } + + /// \overload + /// + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::value<Expr const &>::type + operator ()(Expr const &e) const + { + return e.proto_base().child0; + } + }; + + /// \brief A callable PolymorphicFunctionObject that is + /// equivalent to the \c left() function. + struct left + { + BOOST_PROTO_CALLABLE() + + template<typename Sig> + struct result; + + template<typename This, typename Expr> + struct result<This(Expr)> + { + typedef typename result_of::left<Expr>::type type; + }; + + /// \brief Return the left child of the given binary expression. + /// \param expr The expression node. + /// \pre <tt>is_expr\<Expr\>::value</tt> is \c true + /// \pre <tt>2 == Expr::proto_arity::value</tt> + /// \return <tt>proto::left(expr)</tt> + /// \throw nothrow + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::left<Expr &>::type + operator ()(Expr &e) const + { + return e.proto_base().child0; + } + + /// \overload + /// + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::left<Expr const &>::type + operator ()(Expr const &e) const + { + return e.proto_base().child0; + } + }; + + /// \brief A callable PolymorphicFunctionObject that is + /// equivalent to the \c right() function. + struct right + { + BOOST_PROTO_CALLABLE() + + template<typename Sig> + struct result; + + template<typename This, typename Expr> + struct result<This(Expr)> + { + typedef typename result_of::right<Expr>::type type; + }; + + /// \brief Return the right child of the given binary expression. + /// \param expr The expression node. + /// \pre <tt>is_expr\<Expr\>::value</tt> is \c true + /// \pre <tt>2 == Expr::proto_arity::value</tt> + /// \return <tt>proto::right(expr)</tt> + /// \throw nothrow + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::right<Expr &>::type + operator ()(Expr &e) const + { + return e.proto_base().child1; + } + + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::right<Expr const &>::type + operator ()(Expr const &e) const + { + return e.proto_base().child1; + } + }; + + } + + /// \brief A function that wraps non-Proto expression types in Proto + /// terminals and leaves Proto expression types alone. + /// + /// The <tt>as_expr()</tt> function turns objects into Proto terminals if + /// they are not Proto expression types already. Non-Proto types are + /// held by value, if possible. Types which are already Proto types are + /// left alone and returned by reference. + /// + /// This function can be called either with an explicitly specified + /// \c Domain parameter (i.e., <tt>as_expr\<Domain\>(t)</tt>), or + /// without (i.e., <tt>as_expr(t)</tt>). If no domain is + /// specified, \c default_domain is assumed. + /// + /// If <tt>is_expr\<T\>::value</tt> is \c true, then the argument is + /// returned unmodified, by reference. Otherwise, the argument is wrapped + /// in a Proto terminal expression node according to the following rules. + /// If \c T is a function type, let \c A be <tt>T &</tt>. Otherwise, let + /// \c A be the type \c T stripped of cv-qualifiers. Then, \c as_expr() + /// returns <tt>Domain()(terminal\<A\>::type::make(t))</tt>. + /// + /// \param t The object to wrap. + template<typename T> + BOOST_FORCEINLINE + typename add_const<typename result_of::as_expr<T, default_domain>::type>::type + as_expr(T &t BOOST_PROTO_DISABLE_IF_IS_CONST(T) BOOST_PROTO_DISABLE_IF_IS_FUNCTION(T)) + { + return default_domain::as_expr<T>()(t); + } + + /// \overload + /// + template<typename T> + BOOST_FORCEINLINE + typename add_const<typename result_of::as_expr<T const, default_domain>::type>::type + as_expr(T const &t) + { + return default_domain::as_expr<T const>()(t); + } + + /// \overload + /// + template<typename Domain, typename T> + BOOST_FORCEINLINE + typename add_const<typename result_of::as_expr<T, Domain>::type>::type + as_expr(T &t BOOST_PROTO_DISABLE_IF_IS_CONST(T) BOOST_PROTO_DISABLE_IF_IS_FUNCTION(T)) + { + return typename Domain::template as_expr<T>()(t); + } + + /// \overload + /// + template<typename Domain, typename T> + BOOST_FORCEINLINE + typename add_const<typename result_of::as_expr<T const, Domain>::type>::type + as_expr(T const &t) + { + return typename Domain::template as_expr<T const>()(t); + } + + /// \brief A function that wraps non-Proto expression types in Proto + /// terminals (by reference) and returns Proto expression types by + /// reference + /// + /// The <tt>as_child()</tt> function turns objects into Proto terminals if + /// they are not Proto expression types already. Non-Proto types are + /// held by reference. Types which are already Proto types are simply + /// returned as-is. + /// + /// This function can be called either with an explicitly specified + /// \c Domain parameter (i.e., <tt>as_child\<Domain\>(t)</tt>), or + /// without (i.e., <tt>as_child(t)</tt>). If no domain is + /// specified, \c default_domain is assumed. + /// + /// If <tt>is_expr\<T\>::value</tt> is \c true, then the argument is + /// returned as-is. Otherwise, \c as_child() returns + /// <tt>Domain()(terminal\<T &\>::type::make(t))</tt>. + /// + /// \param t The object to wrap. + template<typename T> + BOOST_FORCEINLINE + typename add_const<typename result_of::as_child<T, default_domain>::type>::type + as_child(T &t BOOST_PROTO_DISABLE_IF_IS_CONST(T) BOOST_PROTO_DISABLE_IF_IS_FUNCTION(T)) + { + return default_domain::as_child<T>()(t); + } + + /// \overload + /// + template<typename T> + BOOST_FORCEINLINE + typename add_const<typename result_of::as_child<T const, default_domain>::type>::type + as_child(T const &t) + { + return default_domain::as_child<T const>()(t); + } + + /// \overload + /// + template<typename Domain, typename T> + BOOST_FORCEINLINE + typename add_const<typename result_of::as_child<T, Domain>::type>::type + as_child(T &t BOOST_PROTO_DISABLE_IF_IS_CONST(T) BOOST_PROTO_DISABLE_IF_IS_FUNCTION(T)) + { + return typename Domain::template as_child<T>()(t); + } + + /// \overload + /// + template<typename Domain, typename T> + BOOST_FORCEINLINE + typename add_const<typename result_of::as_child<T const, Domain>::type>::type + as_child(T const &t) + { + return typename Domain::template as_child<T const>()(t); + } + + /// \brief Return the Nth child of the specified Proto expression. + /// + /// Return the Nth child of the specified Proto expression. If + /// \c N is not specified, as in \c child(expr), then \c N is assumed + /// to be <tt>mpl::long_\<0\></tt>. The child is returned by + /// reference. + /// + /// \param expr The Proto expression. + /// \pre <tt>is_expr\<Expr\>::value</tt> is \c true. + /// \pre \c N is an MPL Integral Constant. + /// \pre <tt>N::value \< Expr::proto_arity::value</tt> + /// \throw nothrow + /// \return A reference to the Nth child + template<typename N, typename Expr> + BOOST_FORCEINLINE + typename result_of::child<Expr &, N>::type + child(Expr &e BOOST_PROTO_DISABLE_IF_IS_CONST(Expr)) + { + return result_of::child<Expr &, N>::call(e); + } + + /// \overload + /// + template<typename N, typename Expr> + BOOST_FORCEINLINE + typename result_of::child<Expr const &, N>::type + child(Expr const &e) + { + return result_of::child<Expr const &, N>::call(e); + } + + /// \overload + /// + template<typename Expr2> + BOOST_FORCEINLINE + typename detail::expr_traits<typename Expr2::proto_base_expr::proto_child0>::reference + child(Expr2 &expr2 BOOST_PROTO_DISABLE_IF_IS_CONST(Expr2)) + { + return expr2.proto_base().child0; + } + + /// \overload + /// + template<typename Expr2> + BOOST_FORCEINLINE + typename detail::expr_traits<typename Expr2::proto_base_expr::proto_child0>::const_reference + child(Expr2 const &expr2) + { + return expr2.proto_base().child0; + } + + /// \brief Return the Nth child of the specified Proto expression. + /// + /// Return the Nth child of the specified Proto expression. The child + /// is returned by reference. + /// + /// \param expr The Proto expression. + /// \pre <tt>is_expr\<Expr\>::value</tt> is \c true. + /// \pre <tt>N \< Expr::proto_arity::value</tt> + /// \throw nothrow + /// \return A reference to the Nth child + template<long N, typename Expr> + BOOST_FORCEINLINE + typename result_of::child_c<Expr &, N>::type + child_c(Expr &e BOOST_PROTO_DISABLE_IF_IS_CONST(Expr)) + { + return result_of::child_c<Expr &, N>::call(e); + } + + /// \overload + /// + template<long N, typename Expr> + BOOST_FORCEINLINE + typename result_of::child_c<Expr const &, N>::type + child_c(Expr const &e) + { + return result_of::child_c<Expr const &, N>::call(e); + } + + /// \brief Return the value stored within the specified Proto + /// terminal expression. + /// + /// Return the the value stored within the specified Proto + /// terminal expression. The value is returned by + /// reference. + /// + /// \param expr The Proto terminal expression. + /// \pre <tt>N::value == 0</tt> + /// \throw nothrow + /// \return A reference to the terminal's value + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::value<Expr &>::type + value(Expr &e BOOST_PROTO_DISABLE_IF_IS_CONST(Expr)) + { + return e.proto_base().child0; + } + + /// \overload + /// + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::value<Expr const &>::type + value(Expr const &e) + { + return e.proto_base().child0; + } + + /// \brief Return the left child of the specified binary Proto + /// expression. + /// + /// Return the left child of the specified binary Proto expression. The + /// child is returned by reference. + /// + /// \param expr The Proto expression. + /// \pre <tt>is_expr\<Expr\>::value</tt> is \c true. + /// \pre <tt>2 == Expr::proto_arity::value</tt> + /// \throw nothrow + /// \return A reference to the left child + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::left<Expr &>::type + left(Expr &e BOOST_PROTO_DISABLE_IF_IS_CONST(Expr)) + { + return e.proto_base().child0; + } + + /// \overload + /// + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::left<Expr const &>::type + left(Expr const &e) + { + return e.proto_base().child0; + } + + /// \brief Return the right child of the specified binary Proto + /// expression. + /// + /// Return the right child of the specified binary Proto expression. The + /// child is returned by reference. + /// + /// \param expr The Proto expression. + /// \pre <tt>is_expr\<Expr\>::value</tt> is \c true. + /// \pre <tt>2 == Expr::proto_arity::value</tt> + /// \throw nothrow + /// \return A reference to the right child + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::right<Expr &>::type + right(Expr &e BOOST_PROTO_DISABLE_IF_IS_CONST(Expr)) + { + return e.proto_base().child1; + } + + /// \overload + /// + template<typename Expr> + BOOST_FORCEINLINE + typename result_of::right<Expr const &>::type + right(Expr const &e) + { + return e.proto_base().child1; + } + + /// INTERNAL ONLY + /// + template<typename Domain> + struct is_callable<functional::as_expr<Domain> > + : mpl::true_ + {}; + + /// INTERNAL ONLY + /// + template<typename Domain> + struct is_callable<functional::as_child<Domain> > + : mpl::true_ + {}; + + /// INTERNAL ONLY + /// + template<long N> + struct is_callable<functional::child_c<N> > + : mpl::true_ + {}; + + /// INTERNAL ONLY + /// + template<typename N> + struct is_callable<functional::child<N> > + : mpl::true_ + {}; + +}} + +#if defined(_MSC_VER) && (_MSC_VER >= 1020) +# pragma warning(pop) +#endif + +#endif |