[9fans] rc and whitespaces

[9fans] rc and whitespaces

[Steve Simon]

rc using backquote to parse strings, e.g:

	hugo% s=`{echo a b c}
	hugo% echo $#s $s(1)
	3 a
This is fine

	hugo% s=`{echo 'a b' c}
	hugo% echo $#s $s(1)
	3 a
This is also fine, a b and c are just two fields when they
enter echo but they leave the appear to be 3 seperate words.

	hugo% s=`{echo '''a b''' c}
	hugo% echo $#s $s(1)
	3 'a
This is disappointing, I was hoping that I would get
2 args and the first would be 'a b' (quotes here for
clarity, I was hoping there would be none in the assinged
variable $s

Is this what one would expect or is the text parsing
by `{ .. } different to rc's normal one - dare I say broken.

Is there a way round this?

Thanks,

-Steve

Re: [9fans] rc and whitespaces

[Friedrich Psiorz]

That behaviour is what I would expect. rc splits text in `{} according
to $ifs, which is usually space, tab, and newline. It doesn't treat any
characters special, including quotes.

Am 26.11.2014 um 14:02 schrieb Steve Simon:
> rc using backquote to parse strings, e.g:
>
> 	hugo% s=`{echo a b c}
> 	hugo% echo $#s $s(1)
> 	3 a
> This is fine
>
> 	hugo% s=`{echo 'a b' c}
> 	hugo% echo $#s $s(1)
> 	3 a
> This is also fine, a b and c are just two fields when they
> enter echo but they leave the appear to be 3 seperate words.
>
> 	hugo% s=`{echo '''a b''' c}
> 	hugo% echo $#s $s(1)
> 	3 'a
> This is disappointing, I was hoping that I would get
> 2 args and the first would be 'a b' (quotes here for
> clarity, I was hoping there would be none in the assinged
> variable $s
>
> Is this what one would expect or is the text parsing
> by `{ .. } different to rc's normal one - dare I say broken.
>
> Is there a way round this?
>
> Thanks,
>
> -Steve
>

Re: [9fans] rc and whitespaces

[erik quanstrom]

> This is also fine, a b and c are just two fields when they
> enter echo but they leave the appear to be 3 seperate words.
>
> 	hugo% s=`{echo '''a b''' c}
> 	hugo% echo $#s $s(1)
> 	3 'a
> This is disappointing, I was hoping that I would get
> 2 args and the first would be 'a b' (quotes here for
> clarity, I was hoping there would be none in the assinged
> variable $s
>
> Is this what one would expect or is the text parsing
> by `{ .. } different to rc's normal one - dare I say broken.

f.psiorz@gmx.de is correct.  expected behavior.  you could wrap
tokenize in a little program outputting a token per line and then do

	ifs=$nl s=`{echo $list | tokenize}

9atom's rc has additional syntax that prevents ifs from being
global shared state (and the source of many script interation bugs)

	s=`$nl {echo $list | tokenize}

- erik