in reply to Re^2: Call sub in variable module
in thread Call sub in variable module
You still haven't given us a big picture. I can imagine various scenarios where you are providing an engine (web site, build system, data server, ...) where you want to provide a plug in system for users. There are well established techniques for doing those jobs and none of them require the engine to know implementation details of the plug ins.
Maybe you have a task that is quite different, but it's a pretty good bet that the techniques used for plug in architectures can be applied here.
Something to think about is either requiring your users to use a common interface or even to derive their code from a common base class you provide. On the face of it your problem would be solved if your users bend a little, or even if you write shims around their code, so that your engine doesn't become a maintenance nightmare.
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