[xsd-users] Invalid use of incomplete type error for C++ data bindings for OpenDrive 1.6.1 generated with xsdcxx cxx-tree

[Marcel Bruckner]

Dear CodeSynthesis Team,

I have downloaded and extracted the OpenDrive V1.6.1 standard (
https://www.asam.net/standards/detail/opendrive/) that provides multiple
xsd files (The xsd schema is attached to recreate the situation).

I have generated data bindings using:







*xsdcxx cxx-tree --std c++11 \  --reserved-name access=parkingSpace_access
\  --reserved-name link=lane_link \  --reserved-name signal=signals_signal
\  --reserved-name container=road_container \  --generate-serialization
--generate-polymorphic \  --root-element-all \  *.xsd*

When I compile the resulting .hxx and .cxx files using:
*c++ -I.../libxsd -c *.cxx*

I get the following error:

*opendrive_16_junction.hxx:644:74: error: invalid use of incomplete type
‘class simulation::standard::opendrive_schema::_OpenDriveElement’  644 |
    class t_junction: public
::simulation::standard::opendrive_schema::_OpenDriveElement*

And the following warning:

*opendrive_16_core.hxx:274:13: note: forward declaration of ‘class
simulation::standard::opendrive_schema::_OpenDriveElement’  274 |
class _OpenDriveElement;*

The error and warning is repeated for every occurence of *_OpenDriveElement*
in all files.

It happens on:

   - Ubuntu 20.04.2 LTS
   - CodeSynthesis XSD XML Schema to C++ compiler 4.0.0
   - c++ (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0
   - zsh 5.8 (x86_64-ubuntu-linux-gnu) / GNU bash, version
   5.0.17(1)-release (x86_64-pc-linux-gnu)


This prevents me from compiling the generated .hxx and .cxx files and I
cannot use them to parse some maps I need for research.


Best regards,

Marcel Bruckner
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