Re: broken parsing with $((`:`))

[Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>]

On Apr 15, 10:03am, Peter Stephenson wrote:
} 
} Yes, indeed --- there's a funny internal special case for empty strings
} that I never quite get my head around.
} 
} -    if (!*s) {
} +    if (!*s || *s == Nularg) {

I wonder if (a) there are other overlooked cases like this and (b) if it
would be useful to have a #define macro for (c == '\0' || c == Nularg).
A quick grep doesn't find existing cases of that test other than this
new one, but of course if the Nularg part were forgotten, it wouldn't.

I suspect it just isn't that common because Nularg goes away after the
parsing pass.

} (Please, God, make the problems with command and math substitution
} parsing stop now.)

Indeed ... at what point should we consider 5.0.8 to get all these little
edge-case fixes out into the field?