Re: WARNING: sed 3.01 is no longer POSIX.2 compliant
Wichert Akkerman <wakkerma@wiggy.ml.org> wrote:
> As people seem to have noticed, the regular expression code in sed 3.01 has
> changed a lot since 2.05. I qute from /usr/doc/sed/NEWS:
>
> Due to excess performance penalties, I have reverted
> (relative to 3.00) to using regex.c instead of the rx package for
> regular expression handling, at the expense of losing true POSIX.2
> BRE compatability.
>
> This means that POSIX.2 character classes such as [[:space:]] are no longer
> supported.
It should be posible to support these character classes while using
regex.c by passing the string specifying the regular expression through
a preprocessor.
--
Raul
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