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///////////////////////////////////////////////////////////////////////////////
// funop.hpp
// Contains definition of funop[n]\<\> class template.
//
// 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_PP_IS_ITERATING
#error Do not include this file directly
#endif
#define M0(Z, N, DATA) \
typename proto::result_of::as_child<BOOST_PP_CAT(A, N), Domain>::type \
/**/
#define M1(Z, N, DATA) \
proto::as_child<Domain>(BOOST_PP_CAT(a, N)) \
/**/
/// \brief A helper metafunction for computing the
/// return type of \c proto::expr\<\>::operator().
template<typename Expr, typename Domain BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(), typename A)>
struct BOOST_PP_CAT(funop, BOOST_PP_ITERATION())
{
typedef proto::expr<
tag::function
, BOOST_PP_CAT(list, BOOST_PP_INC(BOOST_PP_ITERATION()))<
Expr &
BOOST_PP_ENUM_TRAILING(BOOST_PP_ITERATION(), M0, ~)
>
, BOOST_PP_INC(BOOST_PP_ITERATION())
> type;
static type const call(
Expr &e
BOOST_PP_ENUM_TRAILING_BINARY_PARAMS(BOOST_PP_ITERATION(), A, &a)
)
{
type that = {
e
BOOST_PP_ENUM_TRAILING(BOOST_PP_ITERATION(), M1, ~)
};
return that;
}
};
/// \brief A helper metafunction for computing the
/// return type of \c proto::expr\<\>::operator().
template<typename Expr BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(), typename A), typename This, typename Domain>
struct funop<Expr(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(), A)), This, Domain>
: BOOST_PP_CAT(funop, BOOST_PP_ITERATION())<
typename detail::same_cv<Expr, This>::type
, Domain
BOOST_PP_ENUM_TRAILING_BINARY_PARAMS(
BOOST_PP_ITERATION()
, typename remove_reference<A
, >::type BOOST_PP_INTERCEPT
)
>
{};
#undef M0
#undef M1
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