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Re2c: Features, Overview & Philosophy

re2c is a free and open-source lexer generator for C, C++, D, Go, Haskell, Java, JavaScript, OCaml, Python, Rust, V and Zig. It compiles declarative regular expression specifications to deterministic finite automata. Originally written by Peter Bumbulis and described in his paper, re2c was put in public domain and has been since maintained by volunteers.…

Language: English [EN]
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Re2c topic overview

The analysis highlights Features, Overview and Philosophy as prominent areas in the source structure around Re2c. 1 topic appears in more than one source area, which can help identify connections that are less obvious in a linear reading.

Related topics
33
Source areas
4
Connected nodes
38
Extracted relationships
70
Concept neighborhoods
10
Bridge connections
38

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.

Overview · 19 topics
Features · 11 topics
Philosophy · 3 topics
Syntax · 1 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
Public domain
Original author
Peter Bumbulis
Release
around 1994; 32 years ago (1994)
Repository
github.com/skvadrik/re2c
Stable release
4.3 / 30 June 2025
Type
Lexical analyzer generator

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

Philosophy

Features

Syntax

  • Flex Flex (lexical analyser generator)

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 Re2c connects Entity context

The extracted context around Re2c shows recurring relationship patterns in the source. For example, Re2c → Additionally, ASCII, Besides, Data, Debugging, DFA, DOT, EBCDIC, Encoding, Flexible, Input, NFA, POSIX-compliant, Self-validation, Start, Storable, Submatch, TDFA, The, UCS-2 Another extracted example is Re2c → CODE, CONFIG, Configurations, Definitions, Each, Flex, For, REGEXP, Rules, There, VALUE, WhenREGEXPmatches. Use these groups to spot repeated connection types before inspecting the individual relationships.

Re2c

Top relations

related to Features · 24
Re2c → Additionally, ASCII, Besides, Data, Debugging, DFA, DOT, EBCDIC, Encoding, Flexible, Input, NFA, POSIX-compliant, Self-validation, Start, Storable, Submatch, TDFA, The, UCS-2
related to Syntax · 12
Re2c → CODE, CONFIG, Configurations, Definitions, Each, Flex, For, REGEXP, Rules, There, VALUE, WhenREGEXPmatches
related to Regular expressions · 8
Re2c → Flex, POSIX-style, Rfollowed, RorSR, Salternative, Sconcatenation, Sdifference, Slookahead
related to Example · 7
Re2c → Given, Here, It, See, The, There, Which
related to Philosophy · 5
Re2c → Another, DFA, Instead, Moreover, The
License · 1
Re2c → Public domain
Original author · 1
Re2c → Peter Bumbulis
Release · 1
Re2c → around 1994; 32 years ago (1994)
Repository · 1
Re2c → github.com/skvadrik/re2c
Stable release · 1
Re2c → 4.3 / 30 June 2025

Important terminology

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

Important terminology

program code lexer generator input regular used dfa lexers generated example number interface rules expression implementation see also website peter

Re2c relationships Subject–Predicate–Object triples

TTTA extracted 70 structured relationships around Re2c. Examples in this analysis include Re2c → License → Public domain and Re2c → Original author → Peter Bumbulis. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Re2cLicensePublic domain1.00infobox
Re2cOriginal authorPeter Bumbulis1.00infobox
Re2cReleasearound 1994; 32 years ago (1994)1.00infobox
Re2cRepositorygithub.com/skvadrik/re2c1.00infobox
Re2cStable release4.3 / 30 June 20251.00infobox
Re2cTypeLexical analyzer generator1.00infobox
Re2cWebsitere2c.org1.00infobox
Re2cis afree and open-source lexer generator for C0.90text
PHPinstance ofIt is the lexer generator adopted by projects0.80text
SpamAssassininstance ofIt is the lexer generator adopted by projects0.80text
Ninja build systeminstance ofIt is the lexer generator adopted by projects0.80text
othersinstance ofIt is the lexer generator adopted by projects0.80text

Related concept clusters Concept neighborhoods

The concept neighborhoods around Re2c bring nearby vocabulary together. In this analysis, examples include Program, Code and Lexers. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Re2c
    • Program
    • Code
    • Lexers
    • Example
    • Instead
    • Multiple
    • One
    • See
    • Supports
    • Interface
    • Used
    • Generated
  • re2c
    • Program
    • Code
    • Lexers
    • Example
    • Instead
    • Multiple
    • One
    • See
    • Supports
    • Interface
    • Used
    • Generated
  • lexer generator
    • Lexers
    • Multiple
    • Re2c
    • Program
    • Also
    • Bumbulis
    • Dfa
    • Domain
    • Expressions
    • Generator
    • Lexer
    • Parser
  • public domain
    • Peter
    • Public
    • Also
    • Expressions
    • Put
    • Syntax
    • See
    • Website
    • Example
    • Generator
    • Lexers
    • Regular
  • flex
    • Mode
    • Syntax
    • Official
    • One
    • See
    • String
    • Used
    • Regular
    • Input
    • Re2c
  • dfa minimization
    • Number
    • Generated
    • Lexers
    • Lexer
    • Multiple
    • Input
    • Code
    • Program
    • Re2c
  • dfa
    • Number
    • Generated
    • Lexers
    • Lexer
    • Multiple
    • Input
    • Code
    • Program
    • Re2c
  • syntax
    • Flex
    • Mode
    • Official
    • One
    • String
    • Website
    • Used
    • Lexers
    • Input

Connections between topic areas Semantic bridges

For Re2c, one of the stronger structural bridges in this analysis connects Re2c with Overview. 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
Re2c — Overview · splits 19 ⟂ 20
Re2c — Features · splits 27 ⟂ 12
Re2c — Philosophy · splits 35 ⟂ 4

Map overview Semantic statistics

Re2c

Nodes39
Edges38
Triples70
Avg. degree1.95
Density0.051282
Components1

Source & methodology

TTTA analyzes the structure around Re2c to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Features, Overview & Philosophy, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Re2c · EN edition · Analysis: TopicsToTalkAbout

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