On: Learn Regex the Easy Way

[jwilk]

\(\) are part of BRE syntax. They are not GNU extensions.

Source: http://pubs.opengroup.org/onlinepubs/7908799/xbd/re.html#tag...

[Hello71 → jwilk]

er, I meant \{\}.

[jwilk → Hello71]

\{n\}, \{n,\} and \{n,m\} are all in POSIX.

\{,m\} is a (pretty obscure) GNU extensions.

[Hello71 → jwilk]

hm, I could've sworn it wasn't. http://www.regular-expressions.info/gnu.html says that \?, \+, and \| are GNU extensions though.