mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-12-24 21:55:29 +00:00
25dcf36ecb
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@31097 a592a061-630c-0410-9148-cb99ea01b6c8
184 lines
3.7 KiB
C++
184 lines
3.7 KiB
C++
#ifndef BOOST_REF_HPP_INCLUDED
|
|
#define BOOST_REF_HPP_INCLUDED
|
|
|
|
// MS compatible compilers support #pragma once
|
|
|
|
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
|
|
# pragma once
|
|
#endif
|
|
|
|
#include <boost/config.hpp>
|
|
#include <boost/utility/addressof.hpp>
|
|
#include <boost/mpl/bool.hpp>
|
|
#include <boost/detail/workaround.hpp>
|
|
|
|
//
|
|
// ref.hpp - ref/cref, useful helper functions
|
|
//
|
|
// Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
|
|
// Copyright (C) 2001, 2002 Peter Dimov
|
|
// Copyright (C) 2002 David Abrahams
|
|
//
|
|
// 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)
|
|
//
|
|
// See http://www.boost.org/libs/bind/ref.html for documentation.
|
|
//
|
|
|
|
namespace boost
|
|
{
|
|
|
|
template<class T> class reference_wrapper
|
|
{
|
|
public:
|
|
typedef T type;
|
|
|
|
#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, < 1300 )
|
|
|
|
explicit reference_wrapper(T& t): t_(&t) {}
|
|
|
|
#else
|
|
|
|
explicit reference_wrapper(T& t): t_(boost::addressof(t)) {}
|
|
|
|
#endif
|
|
|
|
operator T& () const { return *t_; }
|
|
|
|
T& get() const { return *t_; }
|
|
|
|
T* get_pointer() const { return t_; }
|
|
|
|
private:
|
|
|
|
T* t_;
|
|
};
|
|
|
|
# if defined( __BORLANDC__ ) && BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT(0x581) )
|
|
# define BOOST_REF_CONST
|
|
# else
|
|
# define BOOST_REF_CONST const
|
|
# endif
|
|
|
|
template<class T> inline reference_wrapper<T> BOOST_REF_CONST ref(T & t)
|
|
{
|
|
return reference_wrapper<T>(t);
|
|
}
|
|
|
|
template<class T> inline reference_wrapper<T const> BOOST_REF_CONST cref(T const & t)
|
|
{
|
|
return reference_wrapper<T const>(t);
|
|
}
|
|
|
|
# undef BOOST_REF_CONST
|
|
|
|
# ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
|
|
|
template<typename T>
|
|
class is_reference_wrapper
|
|
: public mpl::false_
|
|
{
|
|
};
|
|
|
|
template<typename T>
|
|
class unwrap_reference
|
|
{
|
|
public:
|
|
typedef T type;
|
|
};
|
|
|
|
# define AUX_REFERENCE_WRAPPER_METAFUNCTIONS_DEF(X) \
|
|
template<typename T> \
|
|
class is_reference_wrapper< X > \
|
|
: public mpl::true_ \
|
|
{ \
|
|
}; \
|
|
\
|
|
template<typename T> \
|
|
class unwrap_reference< X > \
|
|
{ \
|
|
public: \
|
|
typedef T type; \
|
|
}; \
|
|
/**/
|
|
|
|
AUX_REFERENCE_WRAPPER_METAFUNCTIONS_DEF(reference_wrapper<T>)
|
|
#if !defined(BOOST_NO_CV_SPECIALIZATIONS)
|
|
AUX_REFERENCE_WRAPPER_METAFUNCTIONS_DEF(reference_wrapper<T> const)
|
|
AUX_REFERENCE_WRAPPER_METAFUNCTIONS_DEF(reference_wrapper<T> volatile)
|
|
AUX_REFERENCE_WRAPPER_METAFUNCTIONS_DEF(reference_wrapper<T> const volatile)
|
|
#endif
|
|
|
|
# undef AUX_REFERENCE_WRAPPER_METAFUNCTIONS_DEF
|
|
|
|
# else // no partial specialization
|
|
|
|
} // namespace boost
|
|
|
|
#include <boost/type.hpp>
|
|
|
|
namespace boost
|
|
{
|
|
|
|
namespace detail
|
|
{
|
|
typedef char (&yes_reference_wrapper_t)[1];
|
|
typedef char (&no_reference_wrapper_t)[2];
|
|
|
|
no_reference_wrapper_t is_reference_wrapper_test(...);
|
|
|
|
template<typename T>
|
|
yes_reference_wrapper_t is_reference_wrapper_test(type< reference_wrapper<T> >);
|
|
|
|
template<bool wrapped>
|
|
struct reference_unwrapper
|
|
{
|
|
template <class T>
|
|
struct apply
|
|
{
|
|
typedef T type;
|
|
};
|
|
};
|
|
|
|
template<>
|
|
struct reference_unwrapper<true>
|
|
{
|
|
template <class T>
|
|
struct apply
|
|
{
|
|
typedef typename T::type type;
|
|
};
|
|
};
|
|
}
|
|
|
|
template<typename T>
|
|
class is_reference_wrapper
|
|
{
|
|
public:
|
|
BOOST_STATIC_CONSTANT(
|
|
bool, value = (
|
|
sizeof(detail::is_reference_wrapper_test(type<T>()))
|
|
== sizeof(detail::yes_reference_wrapper_t)));
|
|
|
|
typedef ::boost::mpl::bool_<value> type;
|
|
};
|
|
|
|
template <typename T>
|
|
class unwrap_reference
|
|
: public detail::reference_unwrapper<
|
|
is_reference_wrapper<T>::value
|
|
>::template apply<T>
|
|
{};
|
|
|
|
# endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
|
|
|
template<class T> inline T* get_pointer( reference_wrapper<T> const & r )
|
|
{
|
|
return r.get_pointer();
|
|
}
|
|
|
|
} // namespace boost
|
|
|
|
#endif // #ifndef BOOST_REF_HPP_INCLUDED
|