This is a feature request for something above and beyond what Matlab provides in +pkg directories.

It is desirable to be able to create a +pkg namespace with programmable name resolution. This would involve either a specially named m-file function in the +pkg directory that Octave calls in special circumstances, or a C++ call into the interpreter to register some kind of name resolution fallback function for when a symbol is not found via the normal means.

If this is done with an m-file function (or oct-file function), the name should be chosen to be sufficiently private to Octave to avoid conflict with existing user code or Matlab code. Something with double underscores would probably be best.

As a motivating example, I want to be able to provide a +py namespace with no hard-coded m-file functions in it. Instead, any name that starts with "py." will be passed to user code that will perform the name lookup and call a function or return a reference to a data value.