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// Boost.TypeErasure library
//
// Copyright 2012-2013 Steven Watanabe
//
// 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)
//
// $Id$
#ifndef BOOST_TYPE_ERASURE_MEMBER_HPP_INCLUDED
#define BOOST_TYPE_ERASURE_MEMBER_HPP_INCLUDED
#include <boost/detail/workaround.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/dec.hpp>
#include <boost/preprocessor/comma_if.hpp>
#include <boost/preprocessor/repetition/enum.hpp>
#include <boost/preprocessor/repetition/enum_trailing.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/repetition/enum_trailing_params.hpp>
#include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp>
#include <boost/preprocessor/seq/size.hpp>
#include <boost/preprocessor/seq/elem.hpp>
#include <boost/preprocessor/tuple/elem.hpp>
#include <boost/type_erasure/detail/macro.hpp>
#include <boost/type_erasure/detail/const.hpp>
#include <boost/type_erasure/rebind_any.hpp>
#include <boost/type_erasure/placeholder.hpp>
#include <boost/type_erasure/call.hpp>
#include <boost/type_erasure/concept_interface.hpp>
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_ARG(z, n, data) \
typename ::boost::type_erasure::as_param<Base, BOOST_PP_CAT(A, n)>::type BOOST_PP_CAT(a, n)
#if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || \
defined(BOOST_TYPE_ERASURE_DOXYGEN) || \
BOOST_WORKAROUND(BOOST_MSVC, == 1800)
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_QUALIFIED_ID(seq, N) \
BOOST_TYPE_ERASURE_QUALIFIED_NAME(seq)<R(BOOST_PP_ENUM_PARAMS(N, A)), T>
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_TPL_ARG_LIST(N, X) BOOST_PP_ENUM_TRAILING_PARAMS(N, X)
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_ENUM_PARAMS(N, X) BOOST_PP_ENUM_PARAMS(N, X)
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_FORWARD(z, n, data) ::std::forward<BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(2, 0, data), n)>(BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(2, 1, data), n))
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_FORWARD_PARAMS(N, X, x) BOOST_PP_ENUM(N, BOOST_TYPE_ERASURE_MEMBER_FORWARD, (X, x))
/** INTERNAL ONLY*/
#define BOOST_TYPE_ERASURE_FORWARD_REBIND1(z, n, data) ::std::forward<typename ::boost::type_erasure::as_param<Base, BOOST_PP_CAT(A, n)>::type>(BOOST_PP_CAT(a, n))
/** INTERNAL ONLY*/
#define BOOST_TYPE_ERASURE_MEMBER_FORWARD_REBIND(N) BOOST_PP_ENUM_TRAILING(N, BOOST_TYPE_ERASURE_FORWARD_REBIND1, ~)
#else
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_FORWARD_PARAMS(N, X, x) BOOST_PP_ENUM_PARAMS(N, x)
/** INTERNAL ONLY*/
#define BOOST_TYPE_ERASURE_MEMBER_FORWARD_REBIND(N) BOOST_PP_ENUM_TRAILING_PARAMS(N, a)
#endif
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_ENUM_TRAILING_PARAMS(N, X) BOOST_PP_ENUM_TRAILING_PARAMS(N, X)
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_ENUM_TRAILING_BINARY_PARAMS(N, X, x) BOOST_PP_ENUM_TRAILING_BINARY_PARAMS(N, X, x)
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_ENUM_ARGS(N) BOOST_PP_ENUM(N, BOOST_TYPE_ERASURE_MEMBER_ARG, ~)
/**
* \brief Defines a primitive concept for a member function.
*
* \param qualified_name should be a preprocessor sequence
* of the form (namespace1)(namespace2)...(concept_name).
* \param member is the name of the member function.
* \param N is the number of arguments of the function.
*
* The declaration of the concept is
* \code
* template<class Sig, class T = _self>
* struct ::namespace1::namespace2::...::concept_name;
* \endcode
* where Sig is a function type giving the
* signature of the member function, and T is the
* object type. T may be const-qualified for
* const member functions.
*
* This macro can only be used in the global namespace.
*
* Example:
*
* \code
* BOOST_TYPE_ERASURE_MEMBER((boost)(has_push_back), push_back, 1)
* typedef boost::has_push_back<void(int), _self> push_back_concept;
* \endcode
*
* \note In C++11 the argument N is ignored and may be omitted.
* BOOST_TYPE_ERASURE_MEMBER will always define a variadic concept.
*/
#define BOOST_TYPE_ERASURE_MEMBER(qualified_name, member, N) \
BOOST_TYPE_ERASURE_MEMBER_I( \
qualified_name, \
BOOST_PP_SEQ_ELEM(BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(qualified_name)), qualified_name), \
member, \
N)
#else
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_QUALIFIED_ID(seq, N) \
BOOST_TYPE_ERASURE_QUALIFIED_NAME(seq)<R(A...), T>
#define BOOST_TYPE_ERASURE_MEMBER_TPL_ARG_LIST(N, X) , class... A
#define BOOST_TYPE_ERASURE_MEMBER_ENUM_PARAMS(N, X) X...
#define BOOST_TYPE_ERASURE_MEMBER_FORWARD_PARAMS(N, X, x) ::std::forward<X>(x)...
#define BOOST_TYPE_ERASURE_MEMBER_ENUM_TRAILING_PARAMS(N, X) , X...
#define BOOST_TYPE_ERASURE_MEMBER_FORWARD_REBIND(N) , ::std::forward<typename ::boost::type_erasure::as_param<Base, A>::type>(a)...
#define BOOST_TYPE_ERASURE_MEMBER_ENUM_TRAILING_BINARY_PARAMS(N, X, x) , X... x
#define BOOST_TYPE_ERASURE_MEMBER_ENUM_ARGS(N) typename ::boost::type_erasure::as_param<Base, A>::type... a
#define BOOST_TYPE_ERASURE_MEMBER(qualified_name, member, ...) \
BOOST_TYPE_ERASURE_MEMBER_I( \
qualified_name, \
BOOST_PP_SEQ_ELEM(BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(qualified_name)), qualified_name), \
member, \
N)
#endif
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_II(qual_name, concept_name, member, N) \
BOOST_TYPE_ERASURE_OPEN_NAMESPACE(qual_name) \
template<class Sig, class T = ::boost::type_erasure::_self> \
struct concept_name; \
template<class R BOOST_TYPE_ERASURE_MEMBER_TPL_ARG_LIST(N, class A), class T> \
struct concept_name<R(BOOST_TYPE_ERASURE_MEMBER_ENUM_PARAMS(N, A)), T> { \
static R apply(T& t BOOST_TYPE_ERASURE_MEMBER_ENUM_TRAILING_BINARY_PARAMS(N, A, a)) \
{ return t.member(BOOST_TYPE_ERASURE_MEMBER_FORWARD_PARAMS(N, A, a)); } \
}; \
template<class T BOOST_TYPE_ERASURE_MEMBER_TPL_ARG_LIST(N, class A)> \
struct concept_name<void(BOOST_TYPE_ERASURE_MEMBER_ENUM_PARAMS(N, A)), T> { \
static void apply(T& t BOOST_TYPE_ERASURE_MEMBER_ENUM_TRAILING_BINARY_PARAMS(N, A, a)) \
{ t.member(BOOST_TYPE_ERASURE_MEMBER_FORWARD_PARAMS(N, A, a)); } \
}; \
BOOST_TYPE_ERASURE_CLOSE_NAMESPACE(qual_name) \
namespace boost { \
namespace type_erasure { \
template< \
class R BOOST_TYPE_ERASURE_MEMBER_TPL_ARG_LIST(N, class A), \
class T, class Base, class Enable> \
struct concept_interface< \
BOOST_TYPE_ERASURE_MEMBER_QUALIFIED_ID(qual_name, N), \
Base, \
typename ::boost::enable_if< \
::boost::type_erasure::detail::should_be_non_const<T, Base>, \
typename ::boost::remove_const<T>::type \
>::type, \
Enable \
> : Base \
{ \
typedef void BOOST_PP_CAT(_boost_type_erasure_has_member, member); \
typename rebind_any<Base, R>::type member( \
BOOST_TYPE_ERASURE_MEMBER_ENUM_ARGS(N)) \
{ \
return ::boost::type_erasure::call( \
BOOST_TYPE_ERASURE_MEMBER_QUALIFIED_ID(qual_name, N)(), \
*this BOOST_TYPE_ERASURE_MEMBER_FORWARD_REBIND(N)); \
} \
}; \
template< \
class R BOOST_TYPE_ERASURE_MEMBER_TPL_ARG_LIST(N, class A), \
class T, class Base, class Enable> \
struct concept_interface< \
BOOST_TYPE_ERASURE_MEMBER_QUALIFIED_ID(qual_name, N), \
Base, \
typename ::boost::enable_if< \
::boost::type_erasure::detail::should_be_const<T, Base>, \
typename ::boost::remove_const<T>::type \
>::type, \
Enable \
> : Base \
{ \
typedef void BOOST_PP_CAT(_boost_type_erasure_has_member, member); \
typename rebind_any<Base, R>::type member( \
BOOST_TYPE_ERASURE_MEMBER_ENUM_ARGS(N)) const \
{ \
return ::boost::type_erasure::call( \
BOOST_TYPE_ERASURE_MEMBER_QUALIFIED_ID(qual_name, N)(), \
*this BOOST_TYPE_ERASURE_MEMBER_FORWARD_REBIND(N)); \
} \
}; \
template<class R BOOST_TYPE_ERASURE_MEMBER_TPL_ARG_LIST(N, class A), class T, class Base> \
struct concept_interface< \
BOOST_TYPE_ERASURE_MEMBER_QUALIFIED_ID(qual_name, N), \
Base, \
typename ::boost::enable_if< \
::boost::type_erasure::detail::should_be_non_const<T, Base>, \
typename ::boost::remove_const<T>::type \
>::type, \
typename Base::BOOST_PP_CAT(_boost_type_erasure_has_member, member)> : Base \
{ \
using Base::member; \
typename rebind_any<Base, R>::type member( \
BOOST_TYPE_ERASURE_MEMBER_ENUM_ARGS(N)) \
{ \
return ::boost::type_erasure::call( \
BOOST_TYPE_ERASURE_MEMBER_QUALIFIED_ID(qual_name, N)(), \
*this BOOST_TYPE_ERASURE_MEMBER_FORWARD_REBIND(N)); \
} \
}; \
template<class R BOOST_TYPE_ERASURE_MEMBER_TPL_ARG_LIST(N, class A), class T, class Base> \
struct concept_interface< \
BOOST_TYPE_ERASURE_MEMBER_QUALIFIED_ID(qual_name, N), \
Base, \
typename ::boost::enable_if< \
::boost::type_erasure::detail::should_be_const<T, Base>, \
typename ::boost::remove_const<T>::type \
>::type, \
typename Base::BOOST_PP_CAT(_boost_type_erasure_has_member, member)> : Base \
{ \
using Base::member; \
typename rebind_any<Base, R>::type member( \
BOOST_TYPE_ERASURE_MEMBER_ENUM_ARGS(N)) const \
{ \
return ::boost::type_erasure::call( \
BOOST_TYPE_ERASURE_MEMBER_QUALIFIED_ID(qual_name, N)(), \
*this BOOST_TYPE_ERASURE_MEMBER_FORWARD_REBIND(N)); \
} \
}; \
}}
/** INTERNAL ONLY */
#define BOOST_TYPE_ERASURE_MEMBER_I(namespace_name, concept_name, member, N)\
BOOST_TYPE_ERASURE_MEMBER_II(namespace_name, concept_name, member, N)
#endif
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