On Thu, Jul 08, 2010 at 10:31:54PM +0200, Jakub Wilk wrote:
> According to regex(7) manpage, a backslash followed by any other character
> than ^.[$()|*+?{\ matches that character taken as an ordinary character, as
> if the backslash had not been present. However:
>
> * According to POSIX[0], the interpretation of an ordinary character
> preceded by a backslash is undefined.The current manpage (5.10-1 or 5.13 upstream) at least now annotates the corresponding parts, including the one referenced to, with | POSIX.2 leaves some aspects of RE syntax and semantics open; "(!)" | marks decisions on these aspects that may not be fully portable to other | POSIX.2 implementations. So this improves the situation somewhat. > * Worse still, the described behavior differs from what is actually > implemented in the GNU libc: > > $ gcc -Wall testre.c -o testre && ./testre > \S matches foobar This part still seems to hold true. Cheers, Flo
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