cpp2nim

Used to make easier the creation of bindings to C++ projects (Warning - far from complete but might be useful)

How to use it

It works in two stages:

Parsing

This is the slowest step. This is done as follows:

• Process a whole folder: the following example will look for all the files within /usr/include/opencascade.

python parse_headers.py "/usr/include/opencascade/*.hxx" occt

• Process some of the files: the following will do the same for the files meeting the glob: gp_*.hxx. This is useful for very big libraries like OpenCascade (>8000 header files).

python parse_headers.py "/usr/include/opencascade/gp_*.hxx" occt

• One file: the following will also work

python parse_headers.py "/usr/include/opencascade/gp_Pnt.hxx" occt

And for OpenSceneGraph:

$ python parse_headers.py "/usr/include/osg/*" osg
$ python parse_headers.py "/usr/include/osgViewer/**/*" osg

Provided that those libraries are installed on your system. (only tested on linux)

The execution will create the folder writen in the second parameter (occt or osg in the prior examples). Within them the file deleteme/files.pickle will be created with the result from the parsing. It should be easy to export it to yaml or json and process it directly with nim.

Bindings generation

To create the bindings, you just need to do something like:

$ python analyse.py osg

This will:

1. Read the file osg/deleteme/files.pickle
2. Create a <header>.nim file per header.
3. Create a osg_types.nim file with shared types across different headers.
4. Create a osg.nim which imports all the other headers.

Conclusion

The result most likel won't work, but hopefully will get you closer to the result.

I recommend to adapt it to your own needs.

I hope somebody make something better than this. ;oP

ToDo

• There is a lot of missing stuff.
• Spaguetty code
• PassL, PassC
• I don't know C++ (just the very basic)