98 lines
3.2 KiB
Plaintext
98 lines
3.2 KiB
Plaintext
///////////////////////////////////////////////////////////////////////////////
|
|
/// \file pack.hpp
|
|
/// Contains helpers for pseudo-pack expansion.
|
|
//
|
|
// Copyright 2012 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_TRANSFORM_DETAIL_PACK_HPP_EAN_2012_07_11
|
|
#define BOOST_PROTO_TRANSFORM_DETAIL_PACK_HPP_EAN_2012_07_11
|
|
|
|
#include <boost/preprocessor/cat.hpp>
|
|
#include <boost/preprocessor/arithmetic/inc.hpp>
|
|
#include <boost/preprocessor/arithmetic/dec.hpp>
|
|
#include <boost/preprocessor/arithmetic/sub.hpp>
|
|
#include <boost/preprocessor/punctuation/comma_if.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/enum_params_with_a_default.hpp>
|
|
#include <boost/preprocessor/repetition/repeat.hpp>
|
|
#include <boost/preprocessor/iteration/local.hpp>
|
|
#include <boost/preprocessor/iteration/iterate.hpp>
|
|
#include <boost/mpl/bool.hpp>
|
|
#include <boost/mpl/assert.hpp>
|
|
#include <boost/type_traits/is_same.hpp>
|
|
#include <boost/proto/proto_fwd.hpp>
|
|
|
|
#if defined(_MSC_VER)
|
|
# pragma warning(push)
|
|
# pragma warning(disable: 4348) // redefinition of default parameter
|
|
#endif
|
|
|
|
namespace boost { namespace proto
|
|
{
|
|
namespace detail
|
|
{
|
|
template<typename Fun>
|
|
struct msvc_fun_workaround;
|
|
|
|
template<typename Tfx, typename T>
|
|
struct expand_pattern_helper
|
|
{
|
|
typedef T type;
|
|
typedef mpl::false_ applied;
|
|
};
|
|
|
|
template<typename Tfx, typename Fun>
|
|
struct expand_pattern_helper<Tfx, Fun *>
|
|
: expand_pattern_helper<Tfx, Fun>
|
|
{};
|
|
|
|
template<typename Tfx, typename T>
|
|
struct expand_pattern_helper<Tfx, pack(T)>
|
|
{
|
|
// BUGBUG fix me. See comment in transform/detail/call.hpp
|
|
BOOST_MPL_ASSERT_MSG(
|
|
(is_same<T, _>::value)
|
|
, PACK_EXPANSIONS_OF_EXPRESSIONS_OTHER_THAN_THE_CURRENT_NOT_YET_SUPPORTED
|
|
, (T)
|
|
);
|
|
typedef Tfx type(T);
|
|
typedef mpl::true_ applied;
|
|
};
|
|
|
|
template<typename Tfx>
|
|
struct expand_pattern_helper<Tfx, pack(_)>
|
|
{
|
|
typedef Tfx type;
|
|
typedef mpl::true_ applied;
|
|
};
|
|
|
|
#include <boost/proto/transform/detail/expand_pack.hpp>
|
|
|
|
template<long Arity, typename Fun, typename Cont>
|
|
struct expand_pattern;
|
|
|
|
template<typename Fun, typename Cont>
|
|
struct expand_pattern<0, Fun, Cont>
|
|
: Cont::template cat<typename expand_pattern_helper<proto::_value, Fun>::type>
|
|
{
|
|
BOOST_MPL_ASSERT_MSG(
|
|
(expand_pattern_helper<proto::_value, Fun>::applied::value)
|
|
, NO_PACK_EXPRESSION_FOUND_IN_PACK_EXPANSION
|
|
, (Fun)
|
|
);
|
|
};
|
|
|
|
#include <boost/proto/transform/detail/pack_impl.hpp>
|
|
}
|
|
}}
|
|
|
|
#if defined(_MSC_VER)
|
|
# pragma warning(pop)
|
|
#endif
|
|
|
|
#endif
|