[GCC-XML] 2 newbie questions about "pseudo"

[Brad King]

John Morrison wrote:
>>3.) Use the -fxml-start option to avoid getting the extra types.  You
>>just specify a starting declaration and the dump will only include
>>things referenced by it.  Nothing references these "pseudo" declarations
>>so they will not be dumped.
> 
> How do I ask for just the top-level namespace named "::" and avoid the
> other ones "std" and "__gnu_cxx" ???  "-fxml-start=::" didn't work.

By default the global namespace is the starting point.  Anything it 
references is reported.  This includes the extra internal symbols and 
namespaces.  The -fxml-start option could be used to specify the class 
or function name you want to wrap.  The approach I used in the wrapper 
configuration files was something like:

#include <code_to_be_wrapped.h>

namespace wrapper_definitions
{
   typedef ::class_to_be_wrapped class_to_be_wrapped;
   typedef ::class_template_a<int>::class_template_a cta_int;
}

Then the gccxml run would specify -fxml-start=wrapper_definitions.  Then 
the wrapper configuration would be dumped along with the entire 
interface of anything to be wrapped.

>>GCC-XML was originally written to support another tool that generates
>>bindings.  I used option #3 because it also provides a nice way to let
>>the user specify what parts of the interface to wrap and instantiate
>>templates to be wrapped.
> 
> I am trying to take the hint!

The project is called CableSwig:

http://www.itk.org/HTML/CableSwig.html

it adds GCC-XML parsing power to the popular "SWIG" wrapping tool.  It 
was created for wrapping ITK and is not really supported outside of that 
purpose.

Another project that uses GCC-XML to help generate wrappers is:

http://www.boost.org/libs/python/pyste/

but it is only for python.

-Brad