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RE2 (software): Related libraries, Comparison to PCRE & Overview

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.

Language: English [EN]
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RE2 (software) topic overview

The analysis highlights Related libraries, Comparison to PCRE and Overview as prominent areas in the source structure around RE2 (software).

Related topics
38
Source areas
4
Connected nodes
42
Extracted relationships
13
Concept neighborhoods
21
Bridge connections
42

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Related libraries · 17 topics
Overview · 12 topics
Comparison to PCRE · 7 topics
Adoption · 2 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

License
BSD
Operating system
Cross-platform
Original author
Google
Release
March 11, 2010; 16 years ago (2010-03-11)
Repository
github.com/google/re2
Stable release
2021-04-01 / August 12, 2025; 12 months ago (2025-08-12)

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Comparison to PCRE

Adoption

Related libraries

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How RE2 (software) connects Entity context

The extracted context around RE2 (software) shows recurring relationship patterns in the source. For example, RE2 (software) → BSD Another extracted example is RE2 (software) → Cross-platform. Use these groups to spot repeated connection types before inspecting the individual relationships.

RE2 (software)

Top relations

License · 1
RE2 (software) → BSD
Operating system · 1
RE2 (software) → Cross-platform
Original author · 1
RE2 (software) → Google
Release · 1
RE2 (software) → March 11, 2010; 16 years ago (2010-03-11)
Repository · 1
RE2 (software) → github.com/google/re2
Stable release · 1
RE2 (software) → 2021-04-01 / August 12, 2025; 12 months ago (2025-08-12)
Type · 1
RE2 (software) → Regular expression library
Website · 1
RE2 (software) → github.com/google/re2
Written in · 1
RE2 (software) → C++

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

re2 uses regular expression google pcre library algorithm redos finite-state also libraries use memory software contrast based plan denial service

RE2 (software) relationships Subject–Predicate–Object triples

TTTA extracted 13 structured relationships around RE2 (software). Examples in this analysis include RE2 (software) → License → BSD and RE2 (software) → Operating system → Cross-platform. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
RE2 (software)LicenseBSD1.00infobox
RE2 (software)Operating systemCross-platform1.00infobox
RE2 (software)Original authorGoogle1.00infobox
RE2 (software)ReleaseMarch 11, 2010; 16 years ago (2010-03-11)1.00infobox
RE2 (software)Repositorygithub.com/google/re21.00infobox
RE2 (software)Stable release2021-04-01 / August 12, 2025; 12 months ago (2025-08-12)1.00infobox
RE2 (software)TypeRegular expression library1.00infobox
RE2 (software)Websitegithub.com/google/re21.00infobox
RE2 (software)Written inC++1.00infobox
lookaroundsinstance ofwhich supports features0.80text
backreferencesinstance ofwhich supports features0.80text
recursioninstance ofwhich supports features0.80text

Related concept clusters Concept neighborhoods

The concept neighborhoods around RE2 (software) bring nearby vocabulary together. In this analysis, examples include Uses, Google and Algorithm. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • RE2 (software)
    • Uses
    • Google
    • Algorithm
    • Regular
    • Library
    • Expression
    • Available
    • Comparison
    • Languages
    • Package
    • Perl
    • Re2
  • re2 (software)
    • Implements
    • Uses
    • Comparison
    • Languages
    • Perl
    • Re2j
    • Google
    • Expression
    • Algorithm
    • Library
    • Regular
    • Available
  • regular expression
    • Regular
    • Pcre
    • Comparison
    • Example
    • Libraries
    • Perl
    • Software
    • Also
    • Languages
    • Library
    • Re2
    • Implements
  • regular expression libraries
    • Regular
    • Com
    • Comparison
    • Example
    • Perl
    • Written
    • Pcre
    • Libraries
    • Software
    • Also
    • Languages
    • Library
  • perl compatible regular expressions
    • Languages
    • Re2j
    • Software
    • Written
    • Pcre
    • Comparison
    • Example
    • Libraries
    • Perl
    • Regular
    • Also
    • Re2
  • regular languages
    • Perl
    • Re2j
    • Software
    • Supports
    • Pcre
    • Comparison
    • Example
    • Languages
    • Libraries
    • Regular
    • Also
    • Re2
  • comparison to pcre
    • Perl
    • Certain
    • Com
    • Example
    • Languages
    • Libraries
    • Re2j
    • Software
    • Written
    • Regular
    • Expression
    • Also
  • google
    • Com
    • Sheets
    • Re2
    • Library
    • Uses
    • Available
    • Called
    • Comparison
    • Example
    • Libraries
    • Perl
    • Re2j

Connections between topic areas Semantic bridges

For RE2 (software), one of the stronger structural bridges in this analysis connects RE2 (software) with Related libraries. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
RE2 (software) — Related libraries · splits 25 ⟂ 18
RE2 (software) — Overview · splits 30 ⟂ 13
RE2 (software) — Comparison to PCRE · splits 35 ⟂ 8
RE2 (software) — Adoption · splits 40 ⟂ 3

Map overview Semantic statistics

RE2 (software)

Nodes43
Edges42
Triples13
Avg. degree1.95
Density0.046512
Components1

Source & methodology

TTTA analyzes the structure around RE2 (software) to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Related libraries, Comparison to PCRE & Overview, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — RE2 (software) · EN edition · Analysis: TopicsToTalkAbout

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