Re: varaiable expansion and here documents

Re: varaiable expansion and here documents

[Byron Rakitzis]

I don't know if it's obvious in the documentation, but
variable expansion inside here documents is of a very
restricted form. e.g., look at the discusson of how the
'^' character is treated, or how to enter a literal '$'.

If you need list concatenation, backquote expansion, etc.,
then you should use the regular rc parser.

Re: varaiable expansion and here documents

[John Mackin]

    these rules are simple.  let's not confuse matters by allowing
    arbitrary expression syntax to heredocs.

I agree 100% with Paul.  It's not necessary and would just be
a feeping creature.

OK,
John.

Re: varaiable expansion and here documents

[Paul Haahr]

the behavior of Byron's rc agrees with Tom Duff's paper, which refers
to variable names but not expressions.  these rules are simple.  let's
not confuse matters by allowing arbitrary expression syntax to heredocs.

my $.02.

varaiable expansion and here documents

[Scott Merrilees]

I ran into an inconsistancy recently that may be of interest:

; a=(aa bb cc)
; b=2
; echo $a($b)
bb
; cat << EOF
$a($b)
EOF
aa bb cc(2)
;

I expected the output from echo & cat to be identical.

Comments ?  Byron ?

Sm
--
Scott Merrilees, BHP Information Technology, Newcastle, Australia
Internet: Sm@bhpese.oz.au   Phone: +61 49 40 2132   Fax: ... 2165