boost/mpl/bind.hpp
//-----------------------------------------------------------------------------
// boost mpl/bind.hpp header file
// See http://www.boost.org for updates, documentation, and revision history.
//-----------------------------------------------------------------------------
//
// Copyright (c) 2001-02
// Peter Dimov, Aleksey Gurtovoy
//
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appears in all copies and
// that both the copyright notice and this permission notice appear in
// supporting documentation. No representations are made about the
// suitability of this software for any purpose. It is provided "as is"
// without express or implied warranty.
#if !defined(BOOST_PP_IS_ITERATING)
///// header body
#ifndef BOOST_MPL_BIND_HPP_INCLUDED
#define BOOST_MPL_BIND_HPP_INCLUDED
#include "boost/mpl/aux_/apply.hpp"
#include "boost/mpl/aux_/config/bind.hpp"
#include "boost/mpl/aux_/config/lambda.hpp"
#include "boost/mpl/aux_/config/ctps.hpp"
#include "boost/mpl/aux_/config/static_constant.hpp"
#if !defined(BOOST_MPL_PREPROCESSING_MODE)
# include "boost/mpl/placeholders.hpp"
# include "boost/mpl/void.hpp"
# include "boost/mpl/protect.hpp"
# include "boost/mpl/limits/arity.hpp"
# include "boost/mpl/aux_/arity_spec.hpp"
# include "boost/mpl/aux_/type_wrapper.hpp"
# include "boost/mpl/aux_/yes_no.hpp"
# include "boost/mpl/aux_/common_name_wknd.hpp"
# if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
# include "boost/type_traits/is_reference.hpp"
# endif
#endif
#include "boost/mpl/aux_/config/use_preprocessed.hpp"
#if !defined(BOOST_MPL_NO_PREPROCESSED_HEADERS) && \
!defined(BOOST_MPL_PREPROCESSING_MODE)
# if defined(BOOST_MPL_NO_UNNAMED_PLACEHOLDER_SUPPORT)
# define BOOST_MPL_PREPROCESSED_HEADER basic_bind.hpp
# else
# define BOOST_MPL_PREPROCESSED_HEADER bind.hpp
# endif
# include "boost/mpl/aux_/include_preprocessed.hpp"
#else
# include "boost/mpl/aux_/preprocessor/params.hpp"
# include "boost/mpl/aux_/preprocessor/default_params.hpp"
# include "boost/mpl/aux_/preprocessor/def_params_tail.hpp"
# include "boost/mpl/aux_/preprocessor/partial_spec_params.hpp"
# include "boost/mpl/aux_/preprocessor/enum.hpp"
# include "boost/mpl/aux_/preprocessor/add.hpp"
# include "boost/mpl/aux_/config/dtp.hpp"
# include "boost/mpl/aux_/config/nttp.hpp"
# include "boost/preprocessor/iterate.hpp"
# include "boost/preprocessor/comma_if.hpp"
# include "boost/preprocessor/cat.hpp"
# include "boost/preprocessor/inc.hpp"
namespace boost {
namespace mpl {
BOOST_MPL_AUX_COMMON_NAME_WKND(bind1st)
BOOST_MPL_AUX_COMMON_NAME_WKND(bind2nd)
// local macros, #undef-ined at the end of the header
# define AUX_APPLY(args) \
BOOST_MPL_AUX_APPLY(BOOST_MPL_METAFUNCTION_MAX_ARITY, args) \
/**/
# define AUX_BIND_PARAMS(param) \
BOOST_MPL_PP_PARAMS( \
BOOST_MPL_METAFUNCTION_MAX_ARITY \
, param \
) \
/**/
# define AUX_BIND_DEFAULT_PARAMS(param, value) \
BOOST_MPL_PP_DEFAULT_PARAMS( \
BOOST_MPL_METAFUNCTION_MAX_ARITY \
, param \
, value \
) \
/**/
# define AUX_BIND_N_PARAMS(n, param) \
BOOST_PP_COMMA_IF(n) \
BOOST_MPL_PP_PARAMS(n, param) \
/**/
# define AUX_BIND_N_SPEC_PARAMS(n, param, def) \
BOOST_PP_COMMA_IF(n) \
BOOST_MPL_PP_PARTIAL_SPEC_PARAMS(n, param, def) \
/**/
#if !defined(BOOST_NO_DEFAULT_TEMPLATE_PARAMETERS_IN_NESTED_TEMPLATES)
# define AUX_BIND_NESTED_DEFAULT_PARAMS(param, value) \
AUX_BIND_DEFAULT_PARAMS(param, value) \
/**/
#else
# define AUX_BIND_NESTED_DEFAULT_PARAMS(param, value) \
AUX_BIND_PARAMS(param) \
/**/
#endif
namespace aux {
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
template<
typename T, AUX_BIND_PARAMS(typename U)
>
struct resolve_bind_arg
{
typedef T type;
};
# if !defined(BOOST_MPL_NO_UNNAMED_PLACEHOLDER_SUPPORT)
template<
typename T
, typename Arg
>
struct replace_unnamed_arg
{
typedef Arg next_arg;
typedef T type;
};
template<
typename Arg
>
struct replace_unnamed_arg< arg<-1>,Arg >
{
typedef typename Arg::next next_arg;
typedef Arg type;
};
# endif // BOOST_MPL_NO_UNNAMED_PLACEHOLDER_SUPPORT
#else
// agurt, 15/jan/02: it's not a intended to be used as a function class, and
// MSVC6.5 has problems with 'apply' name here (the code compiles, but doesn't
// work), so i went with the 'result_' here, and in all other similar cases
template< bool >
struct resolve_arg_impl
{
template< typename T, AUX_BIND_PARAMS(typename U) > struct result_
{
typedef T type;
};
};
template<>
struct resolve_arg_impl<true>
{
template< typename T, AUX_BIND_PARAMS(typename U) > struct result_
{
typedef typename AUX_APPLY((
T
, AUX_BIND_PARAMS(U)
))::type type;
};
};
// for 'resolve_bind_arg'
template< typename T > struct is_bind_template;
template<
typename T, AUX_BIND_PARAMS(typename U)
>
struct resolve_bind_arg
: resolve_arg_impl< is_bind_template<T>::value >
::template result_< T,AUX_BIND_PARAMS(U) >
{
};
# if !defined(BOOST_MPL_NO_UNNAMED_PLACEHOLDER_SUPPORT)
template< typename T >
struct replace_unnamed_arg_impl
{
template< typename Arg > struct result_
{
typedef Arg next_arg;
typedef T type;
};
};
template<>
struct replace_unnamed_arg_impl< arg<-1> >
{
template< typename Arg > struct result_
{
typedef typename Arg::next next_arg;
typedef Arg type;
};
};
template< typename T, typename Arg >
struct replace_unnamed_arg
: replace_unnamed_arg_impl<T>::template result_<Arg>
{
};
# endif // BOOST_MPL_NO_UNNAMED_PLACEHOLDER_SUPPORT
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
} // namespace aux
#if !defined(BOOST_MPL_NO_BIND_TEMPLATE)
// forward declaration
template<
typename F, AUX_BIND_DEFAULT_PARAMS(typename T, void_)
>
struct bind;
#endif
// fwd, for 'resolve_bind_arg'/'is_bind_template' specializations
template< typename F, typename T > struct bind1st;
template< typename F, typename T > struct bind2nd;
namespace aux {
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
template<
BOOST_MPL_AUX_NTTP_DECL(int, N), AUX_BIND_PARAMS(typename U)
>
struct resolve_bind_arg< arg<N>,AUX_BIND_PARAMS(U) >
{
typedef typename AUX_APPLY((mpl::arg<N>, AUX_BIND_PARAMS(U)))::type type;
};
#if !defined(BOOST_MPL_NO_BIND_TEMPLATE)
template<
typename F, AUX_BIND_PARAMS(typename T), AUX_BIND_PARAMS(typename U)
>
struct resolve_bind_arg< bind<F,AUX_BIND_PARAMS(T)>,AUX_BIND_PARAMS(U) >
{
typedef bind<F,AUX_BIND_PARAMS(T)> f_;
typedef typename AUX_APPLY((f_, AUX_BIND_PARAMS(U)))::type type;
};
#endif
template<
typename F, typename T, AUX_BIND_PARAMS(typename U)
>
struct resolve_bind_arg< bind1st<F,T>, AUX_BIND_PARAMS(U) >
{
typedef bind1st<F,T> f_;
typedef typename AUX_APPLY((f_, AUX_BIND_PARAMS(U)))::type type;
};
template<
typename F, typename T, AUX_BIND_PARAMS(typename U)
>
struct resolve_bind_arg< bind2nd<F,T>, AUX_BIND_PARAMS(U) >
{
typedef bind2nd<F,T> f_;
typedef typename AUX_APPLY((f_, AUX_BIND_PARAMS(U)))::type type;
};
#else
// agurt, 10/mar/02: the forward declaration has to appear before any of
// 'is_bind_helper' overloads, otherwise MSVC6.5 issues an ICE on it
template< BOOST_MPL_AUX_NTTP_DECL(int, arity_) > struct bind_impl_chooser;
aux::no_tag is_bind_helper(...);
template< typename T > aux::no_tag is_bind_helper(protect<T>*);
// overload for "main" form
// agurt, 15/mar/02: MSVC 6.5 fails to properly resolve the overload
// in case if we use 'aux::type_wrapper< bind<...> >' here, and all
// 'bind' instantiations form a complete type anyway
#if !defined(BOOST_MPL_NO_BIND_TEMPLATE)
template<
typename F, AUX_BIND_PARAMS(typename T)
>
aux::yes_tag is_bind_helper(bind<F,AUX_BIND_PARAMS(T)>*);
#endif
template< BOOST_MPL_AUX_NTTP_DECL(int, N) >
aux::yes_tag is_bind_helper(arg<N>*);
template< typename F, typename T > aux::yes_tag is_bind_helper(bind1st<F,T>*);
template< typename F, typename T > aux::yes_tag is_bind_helper(bind2nd<F,T>*);
template< bool is_ref_ = true >
struct is_bind_template_impl
{
template< typename T > struct result_
{
BOOST_STATIC_CONSTANT(bool, value = false);
};
};
template<>
struct is_bind_template_impl<false>
{
template< typename T > struct result_
{
BOOST_STATIC_CONSTANT(bool, value =
sizeof(aux::is_bind_helper(static_cast<T*>(0)))
== sizeof(aux::yes_tag)
);
};
};
template< typename T > struct is_bind_template
: is_bind_template_impl< ::boost::detail::is_reference_impl<T>::value >
::template result_<T>
{
};
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
} // namespace aux
#if !defined(BOOST_MPL_NO_BIND_TEMPLATE)
BOOST_MPL_AUX_ARITY_SPEC(
BOOST_PP_INC(BOOST_MPL_METAFUNCTION_MAX_ARITY)
, bind
)
#endif
BOOST_MPL_AUX_ARITY_SPEC(2,bind1st)
BOOST_MPL_AUX_ARITY_SPEC(2,bind2nd)
#define BOOST_PP_ITERATION_PARAMS_1 \
(3,(0, BOOST_MPL_METAFUNCTION_MAX_ARITY, "boost/mpl/bind.hpp"))
#include BOOST_PP_ITERATE()
// real C++ version is already taken care of
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
&& !defined(BOOST_MPL_NO_BIND_TEMPLATE)
namespace aux {
// apply_count_args
#define BOOST_MPL_AUX_COUNT_ARGS_PREFIX bind
#define BOOST_MPL_AUX_COUNT_ARGS_DEFAULT void_
#define BOOST_MPL_AUX_COUNT_ARGS_ARITY BOOST_MPL_METAFUNCTION_MAX_ARITY
#include "boost/mpl/aux_/count_args.hpp"
}
// bind
template<
typename F, AUX_BIND_PARAMS(typename T)
>
struct bind
: aux::bind_impl_chooser<
aux::bind_count_args<AUX_BIND_PARAMS(T)>::value
>::template result_< F,AUX_BIND_PARAMS(T) >::type
{
};
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
// bind1st/bind2nd, lightweight, for simple cases/backward compatibility
template< typename F, typename T >
struct bind1st
{
template<
typename U
BOOST_MPL_PP_NESTED_DEF_PARAMS_TAIL(1, typename U, void_)
>
struct apply
: BOOST_MPL_AUX_APPLY2(F,T,U)
{
};
};
template< typename F, typename T >
struct bind2nd
{
template<
typename U
BOOST_MPL_PP_NESTED_DEF_PARAMS_TAIL(1, typename U, void_)
>
struct apply
: BOOST_MPL_AUX_APPLY2(F,U,T)
{
};
};
# undef AUX_BIND_NESTED_DEFAULT_PARAMS
# undef AUX_BIND_N_SPEC_PARAMS
# undef AUX_BIND_N_PARAMS
# undef AUX_BIND_DEFAULT_PARAMS
# undef AUX_BIND_PARAMS
# undef AUX_APPLY
} // namespace mpl
} // namespace boost
#endif // BOOST_MPL_USE_PREPROCESSED_HEADERS
#endif // BOOST_MPL_BIND_HPP_INCLUDED
///// iteration, depth == 1
#elif BOOST_PP_ITERATION_DEPTH() == 1
# define i BOOST_PP_FRAME_ITERATION(1)
template<
typename F AUX_BIND_N_PARAMS(i, typename T)
>
struct BOOST_PP_CAT(bind,i)
{
template<
AUX_BIND_NESTED_DEFAULT_PARAMS(typename U, void_)
>
struct apply
{
private:
# if !defined(BOOST_MPL_NO_UNNAMED_PLACEHOLDER_SUPPORT)
typedef aux::replace_unnamed_arg< F,mpl::arg<1> > r0;
typedef typename r0::type a0;
typedef typename r0::next_arg n1;
typedef typename aux::resolve_bind_arg<a0,AUX_BIND_PARAMS(U)>::type f_;
//:
# else
typedef typename aux::resolve_bind_arg<F,AUX_BIND_PARAMS(U)>::type f_;
# endif // BOOST_MPL_NO_UNNAMED_PLACEHOLDER_SUPPORT
# if i > 0
# define BOOST_PP_ITERATION_PARAMS_2 (3,(1, i, "boost/mpl/bind.hpp"))
# include BOOST_PP_ITERATE()
# endif
public:
typedef typename BOOST_MPL_AUX_APPLY(
i
, (f_ AUX_BIND_N_PARAMS(i,t))
)::type type;
};
};
namespace aux {
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
template<
typename F AUX_BIND_N_PARAMS(i, typename T), AUX_BIND_PARAMS(typename U)
>
struct resolve_bind_arg<
BOOST_PP_CAT(bind,i)<F AUX_BIND_N_PARAMS(i,T)>,AUX_BIND_PARAMS(U)
>
{
typedef BOOST_PP_CAT(bind,i)<F AUX_BIND_N_PARAMS(i,T)> f_;
typedef typename AUX_APPLY((f_, AUX_BIND_PARAMS(U)))::type type;
};
#else
template<
typename F AUX_BIND_N_PARAMS(i, typename T)
>
aux::yes_tag
is_bind_helper(BOOST_PP_CAT(bind,i)<F AUX_BIND_N_PARAMS(i,T)>*);
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
} // namespace aux
BOOST_MPL_AUX_ARITY_SPEC(BOOST_PP_INC(i), BOOST_PP_CAT(bind,i))
# if !defined(BOOST_MPL_NO_BIND_TEMPLATE)
# if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
#if i == BOOST_MPL_METAFUNCTION_MAX_ARITY
//: primary template (not a specialization!)
template<
typename F AUX_BIND_N_PARAMS(i, typename T)
>
struct bind
: BOOST_PP_CAT(bind,i)<F AUX_BIND_N_PARAMS(i,T) >
{
};
#else
template<
typename F AUX_BIND_N_PARAMS(i, typename T)
>
struct bind< F AUX_BIND_N_SPEC_PARAMS(i, T, void_) >
: BOOST_PP_CAT(bind,i)<F AUX_BIND_N_PARAMS(i,T) >
{
};
#endif // i == BOOST_MPL_METAFUNCTION_MAX_ARITY
# else
namespace aux {
template<>
struct bind_impl_chooser<i>
{
template<
typename F, AUX_BIND_PARAMS(typename T)
>
struct result_
{
typedef BOOST_PP_CAT(bind,i)< F AUX_BIND_N_PARAMS(i,T) > type;
};
};
} // namespace aux
# endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
# endif // BOOST_MPL_NO_BIND_TEMPLATE
# undef i
///// iteration, depth == 2
#elif BOOST_PP_ITERATION_DEPTH() == 2
# define j BOOST_PP_FRAME_ITERATION(2)
# if !defined(BOOST_MPL_NO_UNNAMED_PLACEHOLDER_SUPPORT)
typedef aux::replace_unnamed_arg< BOOST_PP_CAT(T,j),BOOST_PP_CAT(n,j) > BOOST_PP_CAT(r,j);
typedef typename BOOST_PP_CAT(r,j)::type BOOST_PP_CAT(a,j);
typedef typename BOOST_PP_CAT(r,j)::next_arg BOOST_PP_CAT(n,BOOST_PP_INC(j));
typedef typename aux::resolve_bind_arg<BOOST_PP_CAT(a,j), AUX_BIND_PARAMS(U)>::type BOOST_PP_CAT(t,j);
//:
# else
typedef typename aux::resolve_bind_arg< BOOST_PP_CAT(T,j),AUX_BIND_PARAMS(U)>::type BOOST_PP_CAT(t,j);
# endif
# undef j
#endif // BOOST_PP_IS_ITERATING