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Date: Sun, 11 Nov 2018 10:14:11 -0700
From: Joe M <joe9mail@gmail.com>
To: 9front@9front.org
Subject: Re: [9front] man rc patch
Message-ID: <20181111171411.GA8793@master>
References: <666DC733283F0655D5B3D817FDB6BF28@musolino.id.au>
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X-Bullshit: proven object-oriented deep-learning generator 

> On Sun, Nov 11, 2018, at 6:59 AM, Alex Musolino wrote:
> > Why not just fix it?  This patch [1] seems to do the trick for me.
> >
> > Perhaps also worth mentioning is that $"1 is redundant, since $#1 is
> > always 1; just say $1.

Thanks for the patch.

> why add code to support something which doesn't make sense? :)  i thought it was a bug years ago, but then i realised there is no need for it.  unlike the bourne shell, rc doesn't have an obsession with breaking up strings.  once you've got a string in a variable, it's not going to be split again unless passed to eval.  in fact, supporting $"1 could be said to be deceitful, hiding this great feature from newcomers. ;)

I am trying to avoid the 'rc: null list in evaluation' messages when
using $1 when there is no first argument.

The $"1 outputs a blank string instead of failing with that error
message.

Thanks

#!/bin/rc

fn t{
	echo '$1 is' $1
	echo '$"1 is' $"1
	echo '$#1 is' $#1
	echo '$2 is' $2
	echo '$"2 is' $"2
	echo '$#2 is' $#2
	echo 'testing concatenation of $1 '$2
}

t 100

; rc /tmp/test.rc
$1 is 100
$"1 is
$#1 is 1
$2 is
$"2 is
$#2 is 0
rc: null list in concatenation
;