Boost Users :
Subject: Re: [Boost-users] [regex] problem w/ regex::extended
From: Mark R Stallard (stallard_at_[hidden])
Date: 2015-02-16 08:57:50
U. Mutlu <for-gmane_at_[hidden]> wrote:
> Thank you.
> But on the "POSIX Extended Regular Expression Syntax" page
> the escape sequence \w is very well listed:
I should have explained this more thoroughly. I did not say
that POSIX does not support \w at all. What I said was:
> I suspected that Perl would support the escape sequence \w
> inside a  character set, but POSIX extended might not.
> The tests I ran affirmed those suspicions.
POSIX extended supports \w, but NOT inside a  character set.
For POSIX extended, the regex [\w\-\.~/]+ is the same as
[w\-\.~/]+. Inside of , POSIX extended sees \w as a
You can test this yourself if you have an up-to-date version
of the egrep shell command.
|+| M a r k |+|
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