Re: escape() and '
On 10/25/06, Hari Krishna Dara [EMAIL PROTECTED] wrote: '\V'.escape(substitute(regex, ', '', 'g'), '\') Uh, when did Vim's strings become objects? (Would be really nice if they were, mind you.) nikolai
Re: escape() and '
On 10/25/06, Nikolai Weibull [EMAIL PROTECTED] wrote: On 10/25/06, Hari Krishna Dara [EMAIL PROTECTED] wrote: '\V'.escape(substitute(regex, ', '', 'g'), '\') Uh, when did Vim's strings become objects? (Would be really nice if they were, mind you.) Ahahaha, OK. Sorry. Goddam I hate the concatenation operator. It's virtually impossible to spot. '\V' . escape(...), now that I can sort of semi-read. nikolai
Re: escape() and '
Dnia poniedziałek, 23 października 2006 16:25, Nikolai Weibull napisał:
On 10/23/06, Mikolaj Machowski [EMAIL PROTECTED] wrote:
Hello,
I understand that escape() was primarily designed to escape strings
when passing to system functions, but personally I never used that and
in didn't noticed such use in various scripts but very often it is
used to escape various charaters in Vim's own regexp matching or
passing one string to some other Vim command.
Hence is the problem: when escaping ' with escape(), character is
prepended with \ which doesn't make sense when passing it to other Vim
command because proper way to escape it in Vim is doubling it with
another '. Example::
:echo escape('as''df', )
There should really be a third, optional, parameter to escape() where
you can specify what character to use for escaping.
That wouldn't be real solution because to escape ' you still (in most
situations) would need two escape() calls. One for escape ' with ' and
second for rest of characters with \. The best solution is providing
info about context.
Yakov: why so much contexts? for single and double quotes there is only
difference in number of backslashes. Escaping in command line is rather
problem of which character should be escaped (most notably space), not
system of escaping.
I'd like to see only one flag additional and one default:
s - [default - for backward compatibility] system escaping with \
v - Vim escaping, ' for ' and possibly some other (future?) differences
m.
Re: escape() and '
On 10/23/06, Mikolaj Machowski [EMAIL PROTECTED] wrote: Dnia poniedziałek, 23 października 2006 16:25, Nikolai Weibull napisał: I'll take your word for it that that means that I wrote something at some time or other. There should really be a third, optional, parameter to escape() where you can specify what character to use for escaping. That wouldn't be real solution because to escape ' you still (in most situations) would need two escape() calls. One for escape ' with ' and second for rest of characters with \. The best solution is providing info about context. I don't follow. When would you need to escape both ' with '' and other characters with \? The only active character in a single-quoted string is the single-quote itself. Oh, I see. You're thinking of creating a string for passing to substitute() inside an :execute, or something like that. Ah, true, then you'd need to escape the single-quotes for the string, and, e.g., . with \.. Escaping is a lot more difficult than one often thinks, I suppose. nikolai
Re: escape() and '
Dnia wtorek, 24 października 2006 11:10, Nikolai Weibull napisał: Oh, I see. You're thinking of creating a string for passing to substitute() inside an :execute, or something like that. Ah, true, then you'd need to escape the single-quotes for the string, and, e.g., . with \.. Escaping is a lot more difficult than one often thinks, I suppose. Plus eg. matching string with string()'ed list. m.
Re: escape() and '
On Mon, 23 Oct 2006 at 12:51pm, Mikolaj Machowski wrote:
Hello,
I understand that escape() was primarily designed to escape strings when
passing to system functions, but personally I never used that and in
didn't noticed such use in various scripts but very often it is used to
escape various charaters in Vim's own regexp matching or passing one
string to some other Vim command.
Hence is the problem: when escaping ' with escape(), character is
prepended with \ which doesn't make sense when passing it to other Vim
command because proper way to escape it in Vim is doubling it with
another '. Example::
:echo escape('as''df', )
I didn't even know that you can escape a single-quote inside
single-quotes like this, where is this information burried in Vim help?
It seems to work though, so just checking if it is documented.
--
Thanks,
Hari
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Re: escape() and '
On 10/25/06, Hari Krishna Dara [EMAIL PROTECTED] wrote:
:echo escape('as''df', )
I didn't even know that you can escape a single-quote inside
single-quotes like this, where is this information burried in Vim help?
It seems to work though, so just checking if it is documented.
It's new for Vim 7 I believe.
:help literal-string
nikolai
Re: escape() and '
On Tue, 24 Oct 2006 at 11:10am, Nikolai Weibull wrote: There should really be a third, optional, parameter to escape() where you can specify what character to use for escaping. That wouldn't be real solution because to escape ' you still (in most situations) would need two escape() calls. One for escape ' with ' and second for rest of characters with \. The best solution is providing info about context. I don't follow. When would you need to escape both ' with '' and other characters with \? The only active character in a single-quoted string is the single-quote itself. Oh, I see. You're thinking of creating a string for passing to substitute() inside an :execute, or something like that. Ah, true, then you'd need to escape the single-quotes for the string, and, e.g., . with \.. Escaping is a lot more difficult than one often thinks, I suppose. I don't this this is a valid case either. The problem is only when you need to use such strings with the :exec command (as that involves concatenating strings), but if you are just passing on the string to Vim functions, you don't have to worry about escaping single quotes. Even when you need to concatenate and use a regex, you still need to only escape the single-quotes and backslashes and use it in the \V mode, something like: '\V'.escape(substitute(regex, ', '', 'g'), '\') -- Hari __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
Re: escape() and '
Mikolaj Machowski wrote:
Hello,
I understand that escape() was primarily designed to escape strings when
passing to system functions, but personally I never used that and in
didn't noticed such use in various scripts but very often it is used to
escape various charaters in Vim's own regexp matching or passing one
string to some other Vim command.
Hence is the problem: when escaping ' with escape(), character is
prepended with \ which doesn't make sense when passing it to other Vim
command because proper way to escape it in Vim is doubling it with
another '. Example::
:echo escape('as''df', )
m.
escape() is for a double-quoted string, or for the unquoted strings accepted
by some commands. For a single-quoted string you need something else, such as
substitute(substitute(string,','',g),'^.*$','''\0''')
Best regards,
Tony.
Re: escape() and '
On 10/23/06, A.J.Mechelynck [EMAIL PROTECTED] wrote:
Mikolaj Machowski wrote:
Hello,
I understand that escape() was primarily designed to escape strings when
passing to system functions, but personally I never used that and in
didn't noticed such use in various scripts but very often it is used to
escape various charaters in Vim's own regexp matching or passing one
string to some other Vim command.
Hence is the problem: when escaping ' with escape(), character is
prepended with \ which doesn't make sense when passing it to other Vim
command because proper way to escape it in Vim is doubling it with
another '. Example::
:echo escape('as''df', )
escape() is for a double-quoted string, or for the unquoted strings accepted
by some commands. For a single-quoted string you need something else, such as
substitute(substitute(string,','',g),'^.*$','''\0''')
I realize that you want to provide a solution to a problem and that's
fine, but you don't seem to have understood Mikolaj's
statement/question. He begins with I understand that escape() was
primarily designed to escape strings when passing to system
functions, so I think he can figure out the solution well enough, and
he's instead asking why escape() hasn't been adopted to other areas of
use, such as escaping for regexes, which is a very common operation,
or passing a string to another Vim command.
Also, why would you ever write substitute(x, '^.*$', '''\0''') instead
of ' . x . '?
nikolai
Re: escape() and '
On 10/23/06, Nikolai Weibull [EMAIL PROTECTED] wrote:
On 10/23/06, Mikolaj Machowski [EMAIL PROTECTED] wrote:
Hello,
I understand that escape() was primarily designed to escape strings when
passing to system functions, but personally I never used that and in
didn't noticed such use in various scripts but very often it is used to
escape various charaters in Vim's own regexp matching or passing one
string to some other Vim command.
Hence is the problem: when escaping ' with escape(), character is
prepended with \ which doesn't make sense when passing it to other Vim
command because proper way to escape it in Vim is doubling it with
another '. Example::
:echo escape('as''df', )
There should really be a third, optional, parameter to escape() where
you can specify what character to use for escaping.
I'd suggest that 3rd arg for escape(), if it's neeed (well you
always can brute-force escape things using substitute()), it would
be code of the context (1-5) for which escaping is destined. Because
Vim has at least 4-5 different escaping rules in different contexts:
1) escaping rules for double-quoted strings
2) escaping rules for single-quoted strings
3) escaping rules for :-command-line
4) escaping rules for regexes
5) escaping rules rules for rhs of the mapping.
Escaping would be different for each of those contexts.
Yakov
