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RE: comments break \ at end of line
- X-seq: zsh-workers 12699
- From: "Andrej Borsenkow" <Andrej.Borsenkow@xxxxxxxxxxxxxx>
- To: "Adam Spiers" <adam@xxxxxxxxxx>, "Zsh hackers list" <zsh-workers@xxxxxxxxxxxxxx>
- Subject: RE: comments break \ at end of line
- Date: Fri, 25 Aug 2000 19:58:09 +0400
- Importance: Normal
- In-reply-to: <20000825153830.C22595@xxxxxxxxxxxxxxxxxxxxxxx>
- Mailing-list: contact zsh-workers-help@xxxxxxxxxxxxxx; run by ezmlm
> I'm suggesting that, in the case of the function, it turns it into
> `echo hello, world', and in second case, it expects another line of
> input, just as if you hadn't entered the comment line. After all,
> comment lines are supposed to be ignored, aren't they?
That is exactly what happens currently - everything from `#' up to the next
EOL is ignored.
This seems far
> more sensible behaviour to me: a) it's useful to be able to
> intersperse comments with continuation lines,
No, I am against it. It will turn into a nightmare.
echo foo \
#
# ... 57 lines of comments
#
echo bar
How do you like it?
and b)
if you didn't
> want the continuation happening, you wouldn't have included the
> backslashes in the first place.
>
It is not a continuation. It is simply removing of EOL no more no less (and so
it is documented). Yes, for all practical purposes it is the same as
continuation ...
> > I don't see how you can turn it
> > off without writing a completely new (= bugridden) way of lexing.
>
> As is probably already obvious, I'm fairly ignorant of zsh's lexing
> and parsing. At what stage do comments get dropped? I would have
> thought that if they were dropped earlier on that this would achieve
> what I want, but I'm just guessing.
>
But I just realised. In case of
echo foo \
# comment
bar
how do you want to indicate, that `bar' is not a comment? I mean
echo foo \
#comment \
bar
is the same as
echo foo #comment bar
that makes bar be happily ignored. The above change is trivial, but gains you
nothing. Anything else, I agree, is too error prone.
-andrej
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