Re: When should eval-when eval?

[Marius Vollmer]

Rob Browning <address@hidden> writes:
 
> OK, so eval-when only works on the top level in Guile.  OK.  I kinda
> expected that, and it simplifies things.  That's not the case in CL.

Err, no.  I meant to portray it as working exactly like the CL
`eval-when', but I failed.  I only just learned about the table
describing `eval-when'.

> I wondered why you'd ever put an eval-when in a non-top-level form,
> but it just dawned on me that it might be relevant for
> macroexpansions.  i.e.

I also only just learned that the term "top-level" in CL means
something different from what I thought it does.  It does not
correspond to a empty lexical environment, but is used rather
specifically only for forms processed by `compile-file'.  THe
expression handed to `eval' is not treated as a top-level form, for
example.

> I'll also try to look at the compilation chapter for other
> interesting bits.

Yes, me too.  `eval-when' is much more complicated than I first
thought...