> Well exactly that was however the initial problem: while testing the
> manual of the MUA i maintain i got three occurrences of similar
> errors for \A'' on the result of a ".substring 0 1".
Ouch :-) Not having an `interned' representation can be advantageous,
but here it's definitely a problem...
> Note how you cannot even say \A'\*[a]\*[b]', since the result seems
> to get expanded on the fly and breaks \A'' if that ends up as "\[".
> So this is anything but robust and as such defeats the sole purpose
> of \A''.
Yes, it can't handle backslashes because they are always handled
before the request sees them. Note that you want expansion of \*[...]
and \n[...], but at the same time you want that a solitary `\['
doesn't cause an error. How shall this work?
I can imagine to add another escape sequence (or request) that accepts
a string register as an argument, checking its contents. Cf. the
`dei' request.
Werner
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