ReFRACtor uses SWIG to build its Python bindings from interface (.i) files.

By default in SWIG, type information is global across all SWIG modules loaded, and this can cause type conflicts between modules that were not designed to work together. To solve this in ReFRACtor , we define SWIG_TYPE_TABLE and set it to "refractor".

There is a caveat that only other modules compiled with SWIG_TYPE_TABLE set to "refractor" will share ReFRACtor type information.

Therefore, if you build a child/derived project that intends to use or extend the ReFRACtor Python modules, you MUST set SWIG_TYPE_TABLE to "refractor" and ensure your project is with compiled with -DSWIG_TYPE_TABLE=refractor.

For additional information see Section 16.4 The SWIG runtime code from the SWIG documentation