| 4afa7dd6 | 05-Dec-2020 |
Kyle Evans <kevans@FreeBSD.org> |
libc: regex: retire internal EMPTBR ("Empty branch present")
It was realized just a little too late that this was a hack that belonged in
individual regex(3)-using applications. It was surrounded in
libc: regex: retire internal EMPTBR ("Empty branch present")
It was realized just a little too late that this was a hack that belonged in
individual regex(3)-using applications. It was surrounded in NOTYET and not
implemented in the engine, so remove it.
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| 6b986646 | 05-Dec-2020 |
Kyle Evans <kevans@FreeBSD.org> |
libregex: implement \b and \B (word boundary, not word boundary)
This is the last of the needed GNU expressions before we can unleash bsdgrep
by default. \b is effectively an agnostic equivalent of
libregex: implement \b and \B (word boundary, not word boundary)
This is the last of the needed GNU expressions before we can unleash bsdgrep
by default. \b is effectively an agnostic equivalent of \< and \>, while
\B will match every space that isn't making a transition from
nonchar -> char or char -> nonchar.
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| ca53e5ae | 05-Dec-2020 |
Kyle Evans <kevans@FreeBSD.org> |
libregex: implement \` and \' (begin-of-subj, end-of-subj)
These are GNU extensions, generally equivalent to ^ and $ except that the
new syntax will not match beginning of line after the first in a
libregex: implement \` and \' (begin-of-subj, end-of-subj)
These are GNU extensions, generally equivalent to ^ and $ except that the
new syntax will not match beginning of line after the first in a multi-line
expression or the end of line before absolute last in a multi-line
expression.
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| 18a1e2e9 | 04-Aug-2020 |
Kyle Evans <kevans@FreeBSD.org> |
libregex: Implement a subset of the GNU extensions
The entire patch-set is not yet mature enough for commit, but this usable
subset is generally enough for googletest to be happy with and mostly map
libregex: Implement a subset of the GNU extensions
The entire patch-set is not yet mature enough for commit, but this usable
subset is generally enough for googletest to be happy with and mostly map to
some existing concepts, so they're not as invasive.
The specific changes included here are:
- Branching in BREs with \|
- \w and \W for [[:alnum:]] and [^[:alnum:]] respectively
- \s and \S for [[:space:]] and [^[:space:]] respectively
- Additional quantifiers in BREs, \? and \+ (self-explanatory)
There's some #ifdef'd out work for allowing empty branches as a match-all.
This is a feature that's under assessment... future work will determine
how standard this behavior is and act accordingly.
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