Re: Make format-spec accept a function as the substitution

[Stefan Kangas]

Thierry Volpiatto <thievol@posteo.net> writes:

>> Code should be quoted with `lambda` (which you run with `funcall` or
>> `apply`), not with `quote` (for which you need to use `eval`).
>
> Ok, that's what was proposed initially and is indeed probably the best,
> however I was wondering if an implementation of format-spec not
> evaluating the whole alist at once but only the needed specs would be
> better.

We could do it with a new macro like `read-format-spec-lazy' of course,
but I'm not sure it's worth it.  Using a lambda seems easy enough.