Re: [pygccxml-development] Default values for pointers?

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

On 3/22/06, Matthias Baas <ba...@ir...> wrote:
> Hi,
>
> this is probably a general Boost.Python question but anyway...
>
> I have a couple of classes that have methods like the following:
>
>    bool isDone(MStatus* ReturnStatus=3DNULL) const;
>
> The MStatus object is just used for error reporting. When the user
> passes a MStatus object it will be filled with data specifying whether
> an error has occurred or not, but the user can also decide not to pass
> anything if he isn't interested in the error code.
> pyplusplus generates the following code:
>
>          MItDag_exposer.def( "isDone"
>                  , &MItDag::isDone
>                  , ( bp::arg("ReturnStatus")=3D0 )
>                  , bp::default_call_policies() );
>
> The module compiles fine, I can use it, but why isn't the argument not
> optional anymore? When I try to invoke the method without arguments I
> get an error by Boost.Python:
>
> Boost.Python.ArgumentError: Python argument types in
>      MItDag.isDone(MItDag)
> did not match C++ signature:
>      isDone(class MItDag {lvalue}, class MStatus * ReturnStatus=3D0)
>
>
> Shouldn't the argument be optional as there is the "=3D0" in
> bp::arg("ReturnStatus")=3D0? Or should pyplusplus generate some other cod=
e?

1. I don't know
2. I will take a look what Pyste does
3. Can you try Google
4. boost.python - we always can ask for help there

> - Matthias -

Roman

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