[ctypes-users] member function descriptor

[Roman Y. <rom...@gm...>]

Hello Thomas.

I am working on new "XYZDll" class and found next definition of member
function type:

        class CppMethodType(_CFuncPtr):
            _argtypes_ = argtypes
            _restype_ = restype
            _flags_ = _FUNCFLAG_THISCALL

The definition is not complete and should be extended.

The following things are used to define C++ member function type:

* class type
* return type
* argument types
* "constness"

For example:

  struct X{
      int do_smth( bool ) const;
      int do_smth_else( bool );
  };

The type of do_smth is the following:

  int (X::*)( bool ) const;
  int (X::*)( bool );

or using typedef

  typedef int (X::*do_smth_type)( bool ) const;
  typedef int (X::*do_smth_else_type)( bool );

If function is static, than its type is "same" as free function type:

For:

  int do_smth( bool );

the type is:

  typedef int (*do_smth_free_fun_type)( bool );

A real (none static) member function, allowed to have "virtual"
keyword. Other attribute, which may be [not] important is exception
specification.


"Covariant returns"(
http://msdn.microsoft.com/en-us/magazine/cc301742.aspx ) - is another
issue, related to virtual table construction. I know, we don't discuss
inheritance right now, but I guess you need to see the C++ complexity
and future development directions.

-- 
Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/