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//
Copyright David Abrahams 2002.
//
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
UNWIND_TYPE_DWA200222_HPP
#
define
UNWIND_TYPE_DWA200222_HPP
#
include
<
boost/python/detail/cv_category.hpp
>
#
include
<
boost/python/detail/indirect_traits.hpp
>
#
include
<
boost/python/detail/type_traits.hpp
>
namespace
boost
{
namespace
python
{
namespace
detail
{
#
if
(!defined(_MSC_VER) || _MSC_VER >= 1915)
//
If forward declared, msvc6.5 does not recognize them as inline.
//
However, as of msvc14.15 (_MSC_VER 1915/Visual Studio 15.8.0) name lookup is now consistent with other compilers.
//
forward declaration, required (at least) by Tru64 cxx V6.5-042 and msvc14.15
template
<
class
Generator
,
class
U
>
inline
typename
Generator::result_type
unwind_type
(U
const
& p, Generator* =
0
);
//
forward declaration, required (at least) by Tru64 cxx V6.5-042 and msvc14.15
template
<
class
Generator
,
class
U
>
inline
typename
Generator::result_type
unwind_type
(boost::type<U>*p =
0
, Generator* =
0
);
#
endif
template
<
class
Generator
,
class
U
>
inline
typename
Generator::result_type
unwind_type_cv
(U* p, cv_unqualified, Generator* =
0
)
{
return
Generator::execute
(p);
}
template
<
class
Generator
,
class
U
>
inline
typename
Generator::result_type
unwind_type_cv
(U
const
* p, const_, Generator* =
0
)
{
return
unwind_type
(
const_cast
<U*>(p), (Generator*)
0
);
}
template
<
class
Generator
,
class
U
>
inline
typename
Generator::result_type
unwind_type_cv
(U
volatile
* p, volatile_, Generator* =
0
)
{
return
unwind_type
(
const_cast
<U*>(p), (Generator*)
0
);
}
template
<
class
Generator
,
class
U
>
inline
typename
Generator::result_type
unwind_type_cv
(U
const
volatile
* p, const_volatile_, Generator* =
0
)
{
return
unwind_type
(
const_cast
<U*>(p), (Generator*)
0
);
}
template
<
class
Generator
,
class
U
>
inline
typename
Generator::result_type
unwind_ptr_type
(U* p, Generator* =
0
)
{
typedef
typename
cv_category<U>::type tag;
return
unwind_type_cv<Generator>(p,
tag
());
}
template
<
bool
is_ptr>
struct
unwind_helper
{
template
<
class
Generator
,
class
U
>
static
typename
Generator::result_type
execute
(U p, Generator* =
0
)
{
return
unwind_ptr_type
(p, (Generator*)
0
);
}
};
template
<>
struct
unwind_helper
<
false
>
{
template
<
class
Generator
,
class
U
>
static
typename
Generator::result_type
execute
(U& p, Generator* =
0
)
{
return
unwind_ptr_type
(&p, (Generator*)
0
);
}
};
template
<
class
Generator
,
class
U
>
inline
typename
Generator::result_type
#
if
(!defined(_MSC_VER) || _MSC_VER >= 1915)
unwind_type
(U
const
& p, Generator*)
#
else
unwind_type
(U
const
& p, Generator* =
0
)
#
endif
{
return
unwind_helper<is_pointer<U>::value>::
execute
(p, (Generator*)
0
);
}
enum
{ direct_ =
0
, pointer_ =
1
, reference_ =
2
, reference_to_pointer_ =
3
};
template
<
int
indirection>
struct
unwind_helper2
;
template
<>
struct
unwind_helper2
<direct_>
{
template
<
class
Generator
,
class
U
>
static
typename
Generator::result_type
execute
(U(*)(), Generator* =
0
)
{
return
unwind_ptr_type
((U*)
0
, (Generator*)
0
);
}
};
template
<>
struct
unwind_helper2
<pointer_>
{
template
<
class
Generator
,
class
U
>
static
typename
Generator::result_type
execute
(U*(*)(), Generator* =
0
)
{
return
unwind_ptr_type
((U*)
0
, (Generator*)
0
);
}
};
template
<>
struct
unwind_helper2
<reference_>
{
template
<
class
Generator
,
class
U
>
static
typename
Generator::result_type
execute
(U&(*)(), Generator* =
0
)
{
return
unwind_ptr_type
((U*)
0
, (Generator*)
0
);
}
};
template
<>
struct
unwind_helper2
<reference_to_pointer_>
{
template
<
class
Generator
,
class
U
>
static
typename
Generator::result_type
execute
(U&(*)(), Generator* =
0
)
{
return
unwind_ptr_type
(
U
(
0
), (Generator*)
0
);
}
};
//
Call this one with both template parameters explicitly specified
//
and no function arguments:
//
//
return unwind_type<my_generator,T>();
//
//
Doesn't work if T is an array type; we could handle that case, but
//
why bother?
template
<
class
Generator
,
class
U
>
inline
typename
Generator::result_type
#
if
(!defined(_MSC_VER) || _MSC_VER >= 1915)
unwind_type
(boost::type<U>*, Generator*)
#
else
unwind_type
(boost::type<U>*p =
0
, Generator* =
0
)
#
endif
{
BOOST_STATIC_CONSTANT
(
int
, indirection
= (is_pointer<U>::value ? pointer_ :
0
)
+ (indirect_traits::is_reference_to_pointer<U>::value
? reference_to_pointer_
: is_lvalue_reference<U>::value
? reference_
:
0
));
return
unwind_helper2<indirection>::
execute
((
U
(*)())
0
,(Generator*)
0
);
}
}}}
//
namespace boost::python::detail
#
endif
//
UNWIND_TYPE_DWA200222_HPP
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