On Fri, 5 Sep 2008 12:27:12 -0400, "Mark B." <[EMAIL PROTECTED]> wrote: > On Fri, Sep 5, 2008 at 10:58 AM, Giorgos Keramidas > <[EMAIL PROTECTED]> wrote: > >> $ echo '^Fhello^F' | sed -e 's/[^[:print:]]*//' | hd >> 00000000 68 65 6c 6c 6f 06 0a |hello..| >> 00000007 >> $ > > In case you are interested, I've patched the re_format man page with > this example. I had read it, and it says :print: is the "name of the > character class." I think the concrete example helps clarify things.
Excellent, thank you! Using your text as a starting point, I've committed two examples to the manpage now: one for matching the characters of a class, and one for matching all the characters *not* in a class. %%% Index: re_format.7 =================================================================== --- re_format.7 (revision 182794) +++ re_format.7 (working copy) @@ -288,6 +288,14 @@ A locale may provide others. A character class may not be used as an endpoint of a range. .Pp +A bracketed expression like +.Ql [[:class:]] +can be used to match a single character that belongs to a character +class. +The reverse, matching any character that does not belong to a specific +class, the negation operator of bracket expressions may be used: +.Ql [^[:class:]] . +.Pp There are two special cases\(dd of bracket expressions: the bracket expressions .Ql [[:<:]] %%% Does this look ok? If not, we can commit a followup change and refine it in the next 2-3 days. Then I'll file an MFC request with our release engineering team, and merge it to stable branches too. > A follow question--is it possible to use that statement in a Makefile > (BSD)? A straight cut 'n paste didn't work, and I couldn't figure out > the escaping to make it work. It should be possible. Quoting may be a bit trickier in Makefiles, but can you show me the Makefile you tried?
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