mirror of
https://github.com/BurntSushi/ripgrep.git
synced 2025-08-04 21:52:54 +02:00
afc820c9e9
Previously, when `file` is empty (literally empty, as in, zero byte), `rg -f file` and `rg -vf file` would behave identically. This is odd and also doesn't match how GNU grep behaves. It's also not logically correct. An empty file means _zero_ patterns which is an empty set. An empty set matches nothing. Inverting the empty set should result in matching everything. This was because of an errant optimization that lets ripgrep quit early if it can statically detect that no matches are possible. Moreover, there was *also* a bug in how we constructed the PCRE2 pattern when there are zero patterns. PCRE2 doesn't have a concept of sets of patterns (unlike the `regex` crate), so we need to fake it with an empty character class. Fixes #1332, Fixes #3001, Closes #3041
grep-pcre2
The grep-pcre2 crate provides an implementation of the Matcher trait from
the grep-matcher crate. This implementation permits PCRE2 to be used in the
grep crate for fast line oriented searching.
Dual-licensed under MIT or the UNLICENSE.
Documentation
NOTE: You probably don't want to use this crate directly. Instead, you
should prefer the facade defined in the
grep
crate.
If you're looking to just use PCRE2 from Rust, then you probably want the
pcre2
crate, which provide high level safe bindings to PCRE2.
Usage
Add this to your Cargo.toml:
[dependencies]
grep-pcre2 = "0.1"