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

[Thierry Volpiatto]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

> Thierry Volpiatto [2022-09-29 06:57:07] wrote:
>> After thinking at it, it would be great to allow using interactive calls
>> in specs without wrapping them inside a function:
>>
>> Using this should ask for line number and file:
>> (format-spec "Go to line %n in file %f %g" '((?n . (read-number "Number: "))
>>                                              (?g . "now")
>>                                              (?f . (read-file-name "File: 
>> "))))
>
> ELisp forms under a quote make me cringe.
>
> 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.

-- 
Thierry

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