Question

Is there a way to run multiple filters in a single %rename call in SWIG?

I know from the manual that I can use a line like this:

%rename("%(strip:[H3D])s") "";

which will turn all methods such as “H3DFoo” in to “Foo”. There are other in-built filters for doing case transformation, but there is no documentation on how to do multiple steps.

Using another %rename replaces the filter, and I haven’t found a separator to run multiple filters on the string. So, it appears possible to convert type casing or remove a prefix and not both.

In this particular case it might be possible to use the regex filter, but it would be nice to be able to both remove a prefix and convert type casing. The other option is to put a %rename on every single declaration, but this defeats the purpose of %rename being able to apply to a module in general.

Answer 1

I think I’d be inclined to go for the variant of %rename that can call a command if your rules are more complicated than a single variant or a regex.

I would use perl personally and it has a plethora of CPAN modules for things like renaming, e.g.:

%rename("command:perl build/rename.pl <<<")

The manual warns against this because it’s slow spawning processes to perform it. Given that typically you don’t run SWIG very often I don’t see that as a huge draw back.