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by Hello71 3232 days ago
a more accurate term would be "BRE with GNU extensions", e.g. \(\)
1 comments
jwilk 3232 days ago
\(\) are part of BRE syntax. They are not GNU extensions.

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

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Hello71 3232 days ago
er, I meant \{\}.
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jwilk 3232 days ago
\{n\}, \{n,\} and \{n,m\} are all in POSIX.

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

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Hello71 3232 days ago
hm, I could've sworn it wasn't. http://www.regular-expressions.info/gnu.html says that \?, \+, and \| are GNU extensions though.
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