Re: Question about how to check a symbol is bound

[Alaric Snell-Pym]

On 28/06/2023 14:09, felix.winkelmann@bevuta.com wrote:
> > (define-object-type bar
> >     (field-1 name-of-library#foo)
> >     (field-2 name-of-other-library#some-other-type))
> >
> > ...even though calling symbol-value on those symbols at run time works
> > just fine. It seems that the symbols imported into the environment at
> > macro expansion time are handled differently in some way.
>
> I guess during expansion identifiers are renamed to some internal gensym
> and thus not accessible by name (which is the whole point of a hygienic
> macro system). Could you not register the "foo" type in a expansion time
> hash table?

Alas, the requirement is that things like "foo" are part of the lexical 
environment - so can be imported from modules, renamed, be hidden inside 
local scopes, all that stuff!

> felix

Thanks,

--
Alaric Snell-Pym   (M0KTN neé M7KIT)
http://www.snell-pym.org.uk/alaric/

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