Custom Function Generator Pitfalls

[hostilefork]

@bradrn

does this mean that with-return would suddenly stop working if the body of promise-ish were to define a variable passthru?

Yes.

@bradrn

Indeed, there would have to be a notion of the ‘currently active environment’ from which unbound words lookup their names. (...) Surely specifiers require the same kind of concept already?

Discussion moved to new topic:

Functions That Capture the Current "Evaluation Environment"