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python/test/select_holder.cpp
Dave Abrahams d4e06ac436 Preparation for delivering nicely-formatted error messages in
Boost.Python.  The major change is that, instead of being
boost::function2<PyObject*,PyObject*,PyObject*>, py_function is now a
runtime-polymorphic wrapper for compile-time polymorphic
behavior (just like function) of our own which carries more
information/behaviors.  In particular, you can retrieve an array of
c-strings describing the types in the function signature.
Additionally, the minimum and maximum arity are stored in the
py_function object instead of in the 'function' object which wraps it.

* data_members.hpp -

     Adjustments for the new py_function.  Workarounds for CodeWarrior
     Pro 8.3 bugs in function template argument deduction with
     pointers-to-members.

* has_back_reference.hpp, test/back_reference.cpp,
  test/select_holder.cpp -

     Updated to follow the metafunction protocol

* init.hpp, detail/defaults_gen.hpp -

     Make Keywords a more-specific type in function signatures to
     prevent string literals that show up as char[N] from binding to
     the wrong argument (at least Intel 7.1 for Windows does this).

* make_function.hpp -

     Adjustments for the new py_function.  Arities are now computed
     by caller<>.

* opaque_pointer_converter.hpp, type_id.hpp -

     Use BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS facilities;
     generate specializations that all compilers can handle.

* raw_function.hpp -

     Adjustments for the new py_function.

* caller.hpp -

     Added arity and signature type name reporting.

* detail/config.hpp

     Enable __declspec(dllexport) for Cygwin, thereby fixing the
     recent horrible Cygwin linking problems.


* detail/msvc_typeinfo.hpp -

     Always pass boost::type<T>* explicitly, thereby working around
     incompatible notions of how to specialize function templates with
     default arguments on various compilers.

*   object/function.hpp
  , object/function_handle.hpp
  , object/function_object.hpp
  , object/function_object.cpp

     Adjustments for the new py_function.  Arities are carried by
     py_function.

* object/iterator.hpp, object/iterator.cpp

     Adjustments for the new py_function; we have to compute a
     signature of types to construct it with.

* object/py_function.hpp

     Removed dependency on boost::function; see the comment at the
     top of this entry for more details.

* object/select_holder.hpp

     Clean up to more closely follow MPL idioms.

* test/Jamfile -

     Adjust the embedding test for the new Cygwin use of declspec.
     Update bases and pointee tests with missing properties.

* test/input_iterator.cpp -

     Updates for the new iterator adaptors.

* test/opaque.py -

     Add Python encoding comment to suppress PendinDeprecationWarning
     with recent Python builds.

* test/str.cpp

     Pass a Python long instead of a float to string.expandtabs,
     suppressing a PendinDeprecationWarning with recent Python builds.

* libs/utility/counting_iterator_example.cpp

     Borland workaround

* libs/utility/indirect_iterator_example.cpp

     const-correctness fix.

*


[SVN r19247]
2003-07-22 00:06:41 +00:00

87 lines
2.4 KiB
C++

// Copyright David Abrahams 2002. Permission to copy, use,
// modify, sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#include <boost/python/object/select_holder.hpp>
#include <boost/python/has_back_reference.hpp>
#include <boost/python/detail/not_specified.hpp>
#include <boost/static_assert.hpp>
#include <boost/type_traits/same_traits.hpp>
#include <boost/function/function0.hpp>
#include <boost/mpl/bool.hpp>
#include <memory>
#define BOOST_INCLUDE_MAIN
#include <boost/test/test_tools.hpp>
struct BR {};
struct Base {};
struct Derived : Base {};
namespace boost { namespace python
{
// specialization
template <>
struct has_back_reference<BR>
: mpl::true_
{
};
}} // namespace boost::python
template <class T, class U>
void assert_same(U* = 0, T* = 0)
{
BOOST_TEST((boost::is_same<T,U>::value));
BOOST_STATIC_ASSERT((boost::is_same<T,U>::value));
}
template <class T, class Held, class Holder>
void assert_holder(T* = 0, Held* = 0, Holder* = 0)
{
assert_same<Holder>(
#if BOOST_WORKAROUND(__MWERKS__, <= 0x2407)
boost::python::objects::select_holder<T,Held>::execute((Held*)0).get()
#else
boost::python::objects::select_holder<T,Held>::type::get()
#endif
);
}
int test_main(int, char * [])
{
using namespace boost::python::detail;
using namespace boost::python::objects;
assert_holder<Base,not_specified,value_holder<Base> >();
assert_holder<BR,not_specified,value_holder_back_reference<BR,BR> >();
assert_holder<Base,Base,value_holder<Base> >();
assert_holder<BR,BR,value_holder_back_reference<BR,BR> >();
assert_holder<Base,Derived
,value_holder_back_reference<Base,Derived> >();
assert_holder<Base,std::auto_ptr<Base>
,pointer_holder<std::auto_ptr<Base>,Base> >();
assert_holder<Base,std::auto_ptr<Derived>
,pointer_holder_back_reference<std::auto_ptr<Derived>,Base> >();
assert_holder<BR,std::auto_ptr<BR>
,pointer_holder_back_reference<std::auto_ptr<BR>,BR> > ();
return 0;
}
#if !defined(_WIN32) || defined(__GNUC__)
// This definition is needed for MinGW 2.95.2 and KCC on OSF for some
// reason, but will break other Win32 compilers.
namespace boost { namespace python
{
bool handle_exception_impl(boost::function0<void>) { return false; }
}}
#endif