Re: [Boost-users] [regex] problem w/ regex::extended

Mark R Stallard wrote, On 02/16/2015 02:57 PM:

U. Mutlu 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 literal "w".

Ok, I see, then one better should (generally) use the equivalent, [[:word:]], inside []. Thx for clarification. cu Uenal

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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