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Re: Lexically using modules

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Robert Rothenberg
August 1, 2023 20:03
Re: Lexically using modules
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Apologies for being late to reply.

On 16/07/2023 13:58, Ovid wrote:
> It would be nice to have some kind of pragma like:
>     use feature 'use'; # rubbish name!
> And with that, none of your code could use a module that is not 
> explicitly used or required.

A bit late to this, but maybe call the feature "strict_namespaces"?

I am assuming that code should not refer to another namespace that has 
been explicitly used?

> However, given string eval and other tricks, that might be hard to do. 
> So maybe:
What about accessing things in another namespace with something like 

What about packages like Getopt::Long::Descriptive or Data::Enum that 
create objects in ad hoc namespaces? Will this pragma prevent code from 
using those objects?

What is I pass a reference to something in another namespace to code 
that uses this feature? I would still expect it to work.

What about modules that use a a singleton, e.g. a state variable that is 
shared by everything that uses it? If modules are imported into isolated 
namespaces, will those singletons work?

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