Re: sed: Case-insensitive matching does not work

[Stepan Kasal]

Good day!

Re: /href=raw/I s//href=pot/

On Fri, Oct 11, 2002 at 03:41:33PM +0200, Francesco Potorti` wrote:
> Look for lines matching /href=raw/ insensitively to case, then
> substitute whatever matched with /href=pot/.

This sounds good.  So the command should be spelled as shown above and
whenever has the ``s'' command empty first part (use last regex)
it may not contain the ``I'' modifier.  (An error would be issued
in such case.)  The case sensitivity flag would be inherited from
the previous regex.

> Notice that the I modifier is the *only* modifier allowed after a
> selection regexp, and it's a GNU extension.  Since I did not know about
> it, I did not ever suspect that a modifier could follow a selection
> regexp, while it is natural for me to think that an addition modifier
> exists for case-insenstive matches in the usual place for modifiers,
> that is, at the end.

OTOH, the ``I'' modifier to ``s'' command is the only one which actually
doesn't modify the act of substitution but only modifies the regex.

> Okay, anyway this is only one of the many issues with the sed manual,
> which is way under usual GNU manual standards :-(

If this is true, it would be nice if a volunteer was found for the task.
In case a patch for the documentation is written, I'd bet it won't be
lost.

Just mail any manual enhancements to address@hidden .

Regards,
        Stepan Kasal