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Remove mpl::bool_ dependency from ref.hpp, clean up a bit.

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This commit is contained in:
Peter Dimov
2014-06-01 03:52:44 +03:00
parent 927f98189d
commit 8ad3288b0b
1 changed files with 63 additions and 32 deletions
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89
include/boost/ref.hpp
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@@ -9,7 +9,6 @@
#include <boost/config.hpp>
#include <boost/utility/addressof.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/detail/workaround.hpp>
//
@@ -29,6 +28,8 @@
namespace boost
{
// reference_wrapper
template<class T> class reference_wrapper
{
public:
@@ -47,6 +48,8 @@ private:
T* t_;
};
// ref
# if defined( __BORLANDC__ ) && BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT(0x581) )
# define BOOST_REF_CONST
# else
@@ -58,6 +61,8 @@ template<class T> BOOST_FORCEINLINE reference_wrapper<T> BOOST_REF_CONST ref(T
return reference_wrapper<T>(t);
}
// cref
template<class T> BOOST_FORCEINLINE reference_wrapper<T const> BOOST_REF_CONST cref( T const & t )
{
return reference_wrapper<T const>(t);
@@ -65,51 +70,77 @@ template<class T> BOOST_FORCEINLINE reference_wrapper<T const> BOOST_REF_CONST
# undef BOOST_REF_CONST
// is_reference_wrapper
template<typename T>
class is_reference_wrapper
: public mpl::false_
template<typename T> struct is_reference_wrapper
{
BOOST_STATIC_CONSTANT( bool, value = false );
};
template<typename T>
class unwrap_reference
template<typename T> struct is_reference_wrapper< reference_wrapper<T> >
{
BOOST_STATIC_CONSTANT( bool, value = true );
};
#if !defined(BOOST_NO_CV_SPECIALIZATIONS)
template<typename T> struct is_reference_wrapper< reference_wrapper<T> const >
{
BOOST_STATIC_CONSTANT( bool, value = true );
};
template<typename T> struct is_reference_wrapper< reference_wrapper<T> volatile >
{
BOOST_STATIC_CONSTANT( bool, value = true );
};
template<typename T> struct is_reference_wrapper< reference_wrapper<T> const volatile >
{
BOOST_STATIC_CONSTANT( bool, value = true );
};
#endif // !defined(BOOST_NO_CV_SPECIALIZATIONS)
// unwrap_reference
template<typename T> struct 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; \
}; \
/**/
template<typename T> struct unwrap_reference< reference_wrapper<T> >
{
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
template<typename T> struct unwrap_reference< reference_wrapper<T> const >
{
typedef T type;
};
template<typename T> struct unwrap_reference< reference_wrapper<T> volatile >
{
typedef T type;
};
template <class T> BOOST_FORCEINLINE typename unwrap_reference<T>::type&
unwrap_ref(T& t)
template<typename T> struct unwrap_reference< reference_wrapper<T> const volatile >
{
typedef T type;
};
#endif // !defined(BOOST_NO_CV_SPECIALIZATIONS)
// unwrap_ref
template<class T> BOOST_FORCEINLINE typename unwrap_reference<T>::type& unwrap_ref( T & t )
{
return t;
}
// get_pointer
template<class T> BOOST_FORCEINLINE T* get_pointer( reference_wrapper<T> const & r )
{
return r.get_pointer();