Re: PATCH: bash-style substrings & subarrays

[Bart Schaefer <schaefer@brasslantern.com>]

On Nov 20,  9:15pm, Peter Stephenson wrote:
} Subject: Re: PATCH: bash-style substrings & subarrays
}
} On Fri, 19 Nov 2010 10:01:45 -0800
} Bart Schaefer <schaefer@brasslantern.com> wrote:
} > On Nov 17,  4:54pm, Peter Stephenson wrote:
} > }
} > } This implements the ${NAME:OFFSET} and ${NAME:OFFSET:LENGTH} syntax.
} > 
} > I'm wondering whether :OFFSET:LENGTH shouldn't always use KSH_ARRAYS
} > semantics, or be a valid syntax only when KSH_ARRAYS is set?
} 
} I can see that if you interpret the word "OFFSET" literally it's
} different from a subscript and you might interpret it as starting
} from 0 in any case. I still think on balance consistency with normal
} subscripting is preferable.

I agree that consistency wth normal subscripting is preferable, but
subscripting behaves like a pair of offsets only when KSH_ARRAYS is
set (hence the second alternative I suggested).

However, I'm mostly indifferent.

} I don't think half-measures compatibility with other shells is
} particularly useful, in the end is probably more confusing when you
} find some things work the way you expect and some things don't.

I'm confused about how that relates to the foregoing, sorry ...?

Thanks for the additional patch.