[ale] perl regex.... again

[Michael H. Warfield]

On Mon, 2011-02-28 at 16:41 -0500, Michael H. Warfield wrote: 
> On Mon, 2011-02-28 at 16:28 -0500, Geoffrey Myers wrote: 
> > Pat Regan wrote:
> > > On Mon, 28 Feb 2011 15:38:37 -0500
> > > Geoffrey Myers <lists at serioustechnology.com> wrote:
> > > 
> > >>> Geoffrey,
> > >>>
> > >>> if ($line =~ /[^\040-\176]/) {
> > >>>
> > >>>    print ("Line contains out of range characters\n");
> > >>>
> > >>> }
> > >>>
> > >>> keith
> > >> Does not pick up an string that contains an embedded character
> > >> outside the range.  Say:
> > >>
> > >> This is a bad ^G line.
> > > 
> > > His code should print the message for a control-g.  Can you post your
> > > actual code and some test input that fails?
> > 
> > I cut/pasted his code inside my:
> > 
> > while(<>) {
> > }
> > 
> > the above example is from my test data;

> > This is a bad ^G line.

> Silly question but that is a true cntrl-G and not a ^G like what was in
> your message?

> Due to a bug in his suggested code, why don't you try a tab.  He forgot
> to include the HT (Horizontal Tab) character (\011).  Unless there's a
> problem using octal escapes in bracketed exclusions with perl.  I've
> seen some things what work outside of a bracket range and won't inside.
> Try this instead [^ -~] which will do the same thing (and still has the
> same bug).

Yeah, strong suspicion you can not do \OOO inside a regex.  From the man
page:

man 7 regex

==
...  all other special characters, including '\', lose their special
significance within a bracket expression.
== 

> > > Pat
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> 
> Regards,
> Mike

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Michael H. Warfield (AI4NB) | (770) 985-6132 |  mhw at WittsEnd.com
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