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RE2 is a C++ software library which implements a regular expression engine. It uses finite-state machines, in contrast to most other regular expression libraries. RE2 requires a minimum C++ version of C++17, and uses the Abseil library by Google.
Related libraries, Comparison to PCRE & Overview
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| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| RE2 (software) | License | BSD | 1.00 | infobox |
| RE2 (software) | Operating system | Cross-platform | 1.00 | infobox |
| RE2 (software) | Original author | 1.00 | infobox | |
| RE2 (software) | Release | March 11, 2010; 16 years ago (2010-03-11) | 1.00 | infobox |
| RE2 (software) | Repository | github.com/google/re2 | 1.00 | infobox |
| RE2 (software) | Stable release | 2021-04-01 / August 12, 2025; 12 months ago (2025-08-12) | 1.00 | infobox |
| RE2 (software) | Type | Regular expression library | 1.00 | infobox |
| RE2 (software) | Website | github.com/google/re2 | 1.00 | infobox |
| RE2 (software) | Written in | C++ | 1.00 | infobox |
| lookarounds | instance of | which supports features | 0.80 | text |
| backreferences | instance of | which supports features | 0.80 | text |
| recursion | instance of | which supports features | 0.80 | text |
These clusters group vocabulary that occurs around closely connected concepts in the source material.
Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.