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203 lines
7.7 KiB
203 lines
7.7 KiB
#if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES)
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#include <boost/proto/transform/detail/preprocessed/make.hpp>
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#elif !defined(BOOST_PP_IS_ITERATING)
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#define BOOST_PROTO_MAKE_IF(Z, M, DATA) \
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make_if_<BOOST_PP_CAT(A, M), Expr, State, Data> \
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/**/
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#define BOOST_PROTO_MAKE_IF_TYPE(Z, M, DATA) \
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typename BOOST_PROTO_MAKE_IF(Z, M, DATA) ::type \
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/**/
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#define BOOST_PROTO_MAKE_IF_APPLIED(Z, M, DATA) \
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BOOST_PROTO_MAKE_IF(Z, M, DATA) ::applied || \
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/**/
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#define BOOST_PROTO_CONSTRUCT_ARG(Z, M, DATA) \
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detail::as_lvalue( \
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typename when<_, BOOST_PP_CAT(A, M)>::template impl<Expr, State, Data>()(e, s, d) \
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) \
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/**/
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#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
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#pragma wave option(preserve: 2, line: 0, output: "preprocessed/make.hpp")
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#endif
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///////////////////////////////////////////////////////////////////////////////
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/// \file make.hpp
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/// Contains definition of the make<> transform.
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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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#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
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#pragma wave option(preserve: 1)
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#endif
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#define BOOST_PP_ITERATION_PARAMS_1 \
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(3, (0, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/detail/make.hpp>))
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#include BOOST_PP_ITERATE()
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#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
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#pragma wave option(output: null)
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#endif
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#undef BOOST_PROTO_CONSTRUCT_ARG
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#undef BOOST_PROTO_MAKE_IF_APPLIED
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#undef BOOST_PROTO_MAKE_IF_TYPE
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#undef BOOST_PROTO_MAKE_IF
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#else
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#define N BOOST_PP_ITERATION()
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namespace detail
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{
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#if N > 0
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template<
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template<BOOST_PP_ENUM_PARAMS(N, typename BOOST_PP_INTERCEPT)> class R
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BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)
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, typename Expr, typename State, typename Data
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>
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struct make_<
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R<BOOST_PP_ENUM_PARAMS(N, A)>
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, Expr, State, Data
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BOOST_PROTO_TEMPLATE_ARITY_PARAM(N)
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>
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: nested_type_if<
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R<BOOST_PP_ENUM(N, BOOST_PROTO_MAKE_IF_TYPE, ~)>
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, (BOOST_PP_REPEAT(N, BOOST_PROTO_MAKE_IF_APPLIED, ~) false)
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>
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{};
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template<
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template<BOOST_PP_ENUM_PARAMS(N, typename BOOST_PP_INTERCEPT)> class R
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BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)
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, typename Expr, typename State, typename Data
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>
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struct make_<
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noinvoke<R<BOOST_PP_ENUM_PARAMS(N, A)> >
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, Expr, State, Data
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BOOST_PROTO_TEMPLATE_ARITY_PARAM(1)
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>
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{
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typedef R<BOOST_PP_ENUM(N, BOOST_PROTO_MAKE_IF_TYPE, ~)> type;
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static bool const applied = true;
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};
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#endif
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template<typename R BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
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struct is_applyable<R(BOOST_PP_ENUM_PARAMS(N, A))>
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: mpl::true_
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{};
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template<typename R BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
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struct is_applyable<R(*)(BOOST_PP_ENUM_PARAMS(N, A))>
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: mpl::true_
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{};
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template<typename T, typename A>
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struct construct_<proto::expr<T, A, N>, true>
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{
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typedef proto::expr<T, A, N> result_type;
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template<BOOST_PP_ENUM_PARAMS(BOOST_PP_MAX(N, 1), typename A)>
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BOOST_FORCEINLINE
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result_type operator ()(BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_MAX(N, 1), A, &a)) const
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{
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return result_type::make(BOOST_PP_ENUM_PARAMS(BOOST_PP_MAX(N, 1), a));
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}
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};
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template<typename T, typename A>
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struct construct_<proto::basic_expr<T, A, N>, true>
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{
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typedef proto::basic_expr<T, A, N> result_type;
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template<BOOST_PP_ENUM_PARAMS(BOOST_PP_MAX(N, 1), typename A)>
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BOOST_FORCEINLINE
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result_type operator ()(BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_MAX(N, 1), A, &a)) const
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{
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return result_type::make(BOOST_PP_ENUM_PARAMS(BOOST_PP_MAX(N, 1), a));
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}
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};
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template<typename Type BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
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BOOST_FORCEINLINE
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Type construct(BOOST_PP_ENUM_BINARY_PARAMS(N, A, &a))
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{
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return construct_<Type>()(BOOST_PP_ENUM_PARAMS(N, a));
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}
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} // namespace detail
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/// \brief A PrimitiveTransform which computes a type by evaluating any
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/// nested transforms and then constructs an object of that type with the
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/// current expression, state and data, transformed according
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/// to \c A0 through \c AN.
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template<typename Object BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
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struct make<Object(BOOST_PP_ENUM_PARAMS(N, A))>
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: transform<make<Object(BOOST_PP_ENUM_PARAMS(N, A))> >
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{
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template<typename Expr, typename State, typename Data>
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struct impl : transform_impl<Expr, State, Data>
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{
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/// \brief <tt>boost::result_of\<make\<Object\>(Expr, State, Data)\>::type</tt>
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typedef typename detail::make_if_<Object, Expr, State, Data>::type result_type;
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/// Let \c ax be <tt>when\<_, Ax\>()(e, s, d)</tt>
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/// for each \c x in <tt>[0,N]</tt>.
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/// Return <tt>result_type(a0, a1,... aN)</tt>.
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///
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/// \param e The current expression
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/// \param s The current state
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/// \param d An arbitrary data
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BOOST_FORCEINLINE
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result_type operator ()(
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typename impl::expr_param e
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, typename impl::state_param s
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, typename impl::data_param d
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) const
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{
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proto::detail::ignore_unused(e);
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proto::detail::ignore_unused(s);
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proto::detail::ignore_unused(d);
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return detail::construct<result_type>(BOOST_PP_ENUM(N, BOOST_PROTO_CONSTRUCT_ARG, DATA));
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}
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};
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};
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#if N > 0
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/// \brief A PrimitiveTransform which computes a type by evaluating any
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/// nested transforms and then constructs an object of that type with the
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/// current expression, state and data, transformed according
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/// to \c A0 through \c AN.
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template<typename Object BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
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struct make<Object(BOOST_PP_ENUM_PARAMS(N, A)...)>
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: transform<make<Object(BOOST_PP_ENUM_PARAMS(N, A)...)> >
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{
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template<typename Expr, typename State, typename Data>
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struct impl
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: make<
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typename detail::expand_pattern<
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proto::arity_of<Expr>::value
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, BOOST_PP_CAT(A, BOOST_PP_DEC(N))
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, detail::BOOST_PP_CAT(expand_pattern_rest_, BOOST_PP_DEC(N))<
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Object
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BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_DEC(N), A)
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>
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>::type
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>::template impl<Expr, State, Data>
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{};
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};
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#endif
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#undef N
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#endif
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