value-category-cheatsheet
RE2
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value-category-cheatsheet | RE2 | |
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1 | 49 | |
403 | 8,572 | |
- | 1.5% | |
2.1 | 8.8 | |
10 months ago | 11 days ago | |
Clojure | C++ | |
GNU General Public License v3.0 or later | BSD 3-clause "New" or "Revised" License |
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value-category-cheatsheet
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Tracking mentions began in Dec 2020.
RE2
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C Is the Greenest Programming Language
Looking at the benchmark where C++ is worst compared to other languages, it's depending on the library used. I would guess if they used Google's re2 Regex library instead of Boost's, the result would be different.
https://github.com/greensoftwarelab/Energy-Languages/blob/ma...
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RE2 VS hyperscan - a user suggested alternative
2 projects | 17 Mar 2023
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hyperscan VS RE2 - a user suggested alternative
2 projects | 17 Mar 2023
RE2 is a Google regular expression library
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Projects ideas to learn C++/OOP
google's regex library: https://github.com/google/re2
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First release of SPVM::File::Spec - complex regular expressions, file tests, SPVM::Cwd, inheritance
I ported Google RE2, a regular expression library, to SPVM as Resource::Re2, and created SPVM::Regex, a wrapper for it.
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SPVM::File::Basename is released. This is the first module of SPVM using regular expressions.
I searched for I found that there is a Perl compatible regular expression called Google RE2. It is written in C++, and with Google RE2, I can use Perl-compatible regular expressions as a library.
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Ruby 3.2.0 Is from Another Dimension
Yes, but there is an interesting clarification here. RE2 has used the "caching" approach documented in the Ruby bug ticket linked for quite some time (since its birth?): https://github.com/google/re2/blob/954656f47fe8fb505d4818da1...
It is mentioned only briefly in Cox's article on regex matching in the wild. Look for the word "bitstate": https://swtch.com/~rsc/regexp/regexp3.html
I didn't know Perl had implemented this trick too.
The paper[1] cited in the Ruby bug ticket was published very recently. When I first read the Ruby bug ticket, I immediately wondered how they sidestepped the memory use problem. The paper's abstract seems to suggest there is some technique for doing so, as it rebuffs the idea of doing "full" memoization. Alas, I do not have access the paper. (Which is fucking ridiculous.)
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Regex is comically slow. High performance alternatives? (Pattern matching for validation)
Take a look at Google's RE2: https://github.com/google/re2
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Rob Pike's simple C regex matcher in Go
See also: https://github.com/google/re2/blob/main/re2/bitstate.cc
Although its space complexity is P*T, which limits its use to small regexes/haystacks. It sounds like your claim is that your technique achieves a smaller space bound?
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Nginx-Ingress is driving me nuts
Did you check if your regex meets RE2 standard https://github.com/google/re2/wiki/Syntax , also try setting only the `use-regex` annotation and see (without the rewrite-target)
What are some alternatives?
compile-time-regular-expressions - Compile Time Regular Expression in C++
semver.c - Semantic version in ANSI C
Boost.Signals - Boost.org signals2 module
libevil - The Evil License Manager
constexpr-8cc - Compile-time C Compiler implemented as C++14 constant expressions
Cppcheck - static analysis of C/C++ code
stb - stb single-file public domain libraries for C/C++
ZXing - ZXing ("Zebra Crossing") barcode scanning library for Java, Android
American Fuzzy Lop - american fuzzy lop - a security-oriented fuzzer
casacore - Suite of C++ libraries for radio astronomy data processing
ZBar - Clone of the mercurial repository http://zbar.hg.sourceforge.net:8000/hgroot/zbar/zbar