> I think that in addition to changing those to const we'd change Bro to not 
> accept creating "global" functions.

You still effectively have global functions if you have a global record w/ a 
field that is of function type.  Do we do something about that?

> Are there other inconsistencies?

I think more limitations and the current implicit "const" are adding 
inconsistency and complexity (which comes with more opportunities to bypass in 
unintended ways).

So I'm trying to understand how immutable do function values have to be.

The actions I think increase consistency are:

1) change most/all "global" function decls in scripts shipped w/ Bro to 
explicitly use "const"
2) remove the implicit "const" from "global" functions

These should both be easy tasks, but are they actually enough to allow desired 
optimizations in the compiled-context?  What I didn't get from Robin's comment 
was if the problem is in what the language *allows* regarding function 
mutability or in the common *usage* of functions in current scripts?

- Jon
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