Re: sed: Case-insensitive matching does not work

[Stepan Kasal]

Hello,

On Wed, Oct 09, 2002 at 01:59:17PM +0200, Francesco Potorti` wrote:
> Package: sed
> Version: 3.02-8
> Severity: normal

I'd say it's NOT A BUG, just a dark corner of sed:

> bash-2.05b$ sed -e '/href=raw/s//href=pot/I'
> href=raw --> href=pot
> HREF=RAW --> HREF=RAW

A few examples:
/foo/Id        deletes lines containning the regex, case insensitive;
s/foo/bar/I    replacement---``foo'' is interpreted case insensitive;

/xxx/Is/foo/bar/   replacement which is performed on each line matching
                   the /xxx/ interpreted case insesitively; the /foo/
                   is interpreted case sensitively.

/xxx/s/foo/bar/I   replacement is performed on lines matching /xxx/ (case
                   sensitive), the replacement itself is case insensitive.

So there are two places where ``I'' may (or may not) be.
These two bits of information are independent, even when you use the
shortcut
        /foo/s//bar/

So, the thing you mean may be written in any of the following ways:
        /href=raw/Is/href=raw/href=pot/I
        /href=raw/Is//href=pot/I
or even:
        s/href=raw/href=pot/I

I consider the last form as the most readable one.
Is there any special reason why it cannot be used?

HTH,
        Stepan Kasal