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GitHub - antlr/antlr4: ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.
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6.94l3.22-3.22a.749.749 0 0 1 1.275.326.749.749 0 0 1-.215.734L9.06 8l3.22 3.22a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L8 9.06l-3.22 3.22a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L6.94 8 3.72 4.78a.75.75 0 0 1 0-1.06Z"></path> </svg></button> </div> </div> </div> <scrollable-region data-labelled-by="custom-scopes-dialog-title"> <div data-view-component="true" class="Overlay-body"> <div data-target="custom-scopes.customScopesModalDialogFlash"></div> <div hidden class="create-custom-scope-form" data-target="custom-scopes.createCustomScopeForm"> <!-- '"` --><!-- </textarea></xmp> --></option></form><form id="custom-scopes-dialog-form" data-turbo="false" action="/search/custom_scopes" accept-charset="UTF-8" method="post"><input type="hidden" data-csrf="true" name="authenticity_token" value="lSdX86AkG/k3H/wbsuOvs71F+hdx/r4+G9KASqr8lHUky31HPAigFL1hvX38ELUZfaYbL9Ca83Q1HjrYWb+PPQ==" /> <div data-target="custom-scopes.customScopesModalDialogFlash"></div> <input type="hidden" 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id=\"user-content-antlr-v4\" class=\"anchor\" aria-label=\"Permalink: ANTLR v4\" href=\"#antlr-v4\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ca href=\"http://java.oracle.com\" rel=\"nofollow\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/54e9a5749665f2848d5bf92aaaeb07787956bcd576db5af53e78f468bb9f4eec/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6a6176612d31312b2d3463376539662e737667\" alt=\"Java 11+\" data-canonical-src=\"https://img.shields.io/badge/java-11+-4c7e9f.svg\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\n\u003ca href=\"https://raw.githubusercontent.com/antlr/antlr4/master/LICENSE.txt\" rel=\"nofollow\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/3f9f35c866835373f2429f9db357a9b10435ebff479df3e62b494edb3a2fe933/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6c6963656e73652d4253442d626c75652e737667\" alt=\"License\" data-canonical-src=\"https://img.shields.io/badge/license-BSD-blue.svg\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eANTLR\u003c/strong\u003e (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. It's widely used to build languages, tools, and frameworks. From a grammar, ANTLR generates a parser that can build parse trees and also generates a listener interface (or visitor) that makes it easy to respond to the recognition of phrases of interest.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eDev branch build status\u003c/strong\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003ca href=\"https://github.com/antlr/antlr4/actions/workflows/hosted.yml\"\u003e\u003cimg src=\"https://github.com/antlr/antlr4/actions/workflows/hosted.yml/badge.svg\" alt=\"MacOSX, Windows, Linux\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e (github actions)\u003c/p\u003e\n\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eVersioning\u003c/h2\u003e\u003ca id=\"user-content-versioning\" class=\"anchor\" aria-label=\"Permalink: Versioning\" href=\"#versioning\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eANTLR 4 supports 10 target languages\n(Cpp, CSharp, Dart, Java, JavaScript, PHP, Python3, Swift, TypeScript, Go),\nand ensuring consistency across these targets is a unique and highly valuable feature.\nTo ensure proper support of this feature, each release of ANTLR is a complete release of the tool and the 10 runtimes, all with the same version.\nAs such, ANTLR versioning does not strictly follow semver semantics:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003ea component may be released with the latest version number even though nothing has changed within that component since the previous release\u003c/li\u003e\n\u003cli\u003emajor version is bumped only when ANTLR is rewritten for a totally new \"generation\", such as ANTLR3 -\u0026gt; ANTLR4 (LL(*) -\u0026gt; ALL(*) parsing)\u003c/li\u003e\n\u003cli\u003eminor version updates may include minor breaking changes, the policy is to regenerate parsers with every release (4.11 -\u0026gt; 4.12)\u003c/li\u003e\n\u003cli\u003ebackwards compatibility is only guaranteed for patch version bumps (4.11.1 -\u0026gt; 4.11.2)\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eIf you use a semver verifier in your CI, you probably want to apply special rules for ANTLR, such as treating minor change as a major change.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eRepo branch structure\u003c/h2\u003e\u003ca id=\"user-content-repo-branch-structure\" class=\"anchor\" aria-label=\"Permalink: Repo branch structure\" href=\"#repo-branch-structure\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThe default branch for this repo is \u003ca href=\"https://github.com/antlr/antlr4/tree/master\"\u003e\u003ccode\u003emaster\u003c/code\u003e\u003c/a\u003e, which is the latest stable release and has tags for the various releases; e.g., see release tag \u003ca href=\"https://github.com/antlr/antlr4/tree/4.9.3\"\u003e4.9.3\u003c/a\u003e. Branch \u003ca href=\"https://github.com/antlr/antlr4/tree/dev\"\u003e\u003ccode\u003edev\u003c/code\u003e\u003c/a\u003e is where development occurs between releases and all pull requests should be derived from that branch. The \u003ccode\u003edev\u003c/code\u003e branch is merged back into \u003ccode\u003emaster\u003c/code\u003e to cut a release and the release state is tagged (e.g., with \u003ccode\u003e4.10-rc1\u003c/code\u003e or \u003ccode\u003e4.10\u003c/code\u003e.) Visually our process looks roughly like this:\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"/antlr/antlr4/blob/dev/doc/images/new-antlr-branches.png\"\u003e\u003cimg src=\"/antlr/antlr4/raw/dev/doc/images/new-antlr-branches.png\" width=\"500\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe Go target now has its own dedicated repo:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-shell notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"$ go get github.com/antlr4-go/antlr\"\u003e\u003cpre\u003e$ go get github.com/antlr4-go/antlr\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eNote\u003c/strong\u003e\nThe dedicated Go repo is for \u003ccode\u003ego get\u003c/code\u003e and \u003ccode\u003eimport\u003c/code\u003e only. Go runtime development is still performed in the main \u003ccode\u003eantlr/antlr4\u003c/code\u003e repo.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eAuthors and major contributors\u003c/h2\u003e\u003ca id=\"user-content-authors-and-major-contributors\" class=\"anchor\" aria-label=\"Permalink: Authors and major contributors\" href=\"#authors-and-major-contributors\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"http://www.cs.usfca.edu/~parrt/\" rel=\"nofollow\"\u003eTerence Parr\u003c/a\u003e, \u003ca href=\"mailto:parrt@cs.usfca.edu\"\u003eparrt@cs.usfca.edu\u003c/a\u003e\nANTLR project lead and supreme dictator for life\n\u003ca href=\"http://www.usfca.edu/\" rel=\"nofollow\"\u003eUniversity of San Francisco\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"http://tunnelvisionlabs.com/\" rel=\"nofollow\"\u003eSam Harwell\u003c/a\u003e (Tool co-author, Java and original C# target)\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/ericvergnaud\"\u003eEric Vergnaud\u003c/a\u003e (Javascript, TypeScript, Python2, Python3 targets and maintenance of C# target)\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/pboyer\"\u003ePeter Boyer\u003c/a\u003e (Go target)\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"http://www.soft-gems.net/\" rel=\"nofollow\"\u003eMike Lischke\u003c/a\u003e (C++ completed target)\u003c/li\u003e\n\u003cli\u003eDan McLaughlin (C++ initial target)\u003c/li\u003e\n\u003cli\u003eDavid Sisson (C++ initial target and test)\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/janyou\"\u003eJanyou\u003c/a\u003e (Swift target)\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/ewanmellor\"\u003eEwan Mellor\u003c/a\u003e, \u003ca href=\"https://github.com/hanjoes\"\u003eHanzhou Shi\u003c/a\u003e (Swift target merging)\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/bhamiltoncx\"\u003eBen Hamilton\u003c/a\u003e (Full Unicode support in serialized ATN and all languages' runtimes for code points \u0026gt; U+FFFF)\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/marcospassos\"\u003eMarcos Passos\u003c/a\u003e (PHP target)\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/lingyv-li\"\u003eLingyu Li\u003c/a\u003e (Dart target)\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/KvanTTT\"\u003eIvan Kochurkin\u003c/a\u003e has made major contributions to overall quality, error handling, and Target performance.\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/jcking\"\u003eJustin King\u003c/a\u003e has done a huge amount of work across multiple targets, but especially for C++.\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/kaby76\"\u003eKen Domino\u003c/a\u003e has a knack for finding bugs/issues and analysis; also a major contributor on the \u003ca href=\"https://github.com/antlr/grammars-v4\"\u003egrammars-v4 repo\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/jimidle\"\u003eJim Idle\u003c/a\u003e has contributed to previous versions of ANTLR and recently jumped back in to solve a major problem with the Go target.\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eUseful information\u003c/h2\u003e\u003ca id=\"user-content-useful-information\" class=\"anchor\" aria-label=\"Permalink: Useful information\" href=\"#useful-information\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/antlr/antlr4/releases\"\u003eRelease notes\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/antlr/antlr4/blob/master/doc/getting-started.md\"\u003eGetting started with v4\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"http://www.antlr.org/\" rel=\"nofollow\"\u003eOfficial site\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/antlr/antlr4/blob/master/doc/index.md\"\u003eDocumentation\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/antlr/antlr4/blob/master/doc/faq/index.md\"\u003eFAQ\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/antlr/antlr4/blob/master/doc/targets.md\"\u003eANTLR code generation targets\u003c/a\u003e\u003cbr\u003e(Currently: Java, C#, Python3, JavaScript, TypeScript, Go, C++, Swift, Dart, PHP)\u003c/li\u003e\n\u003cli\u003e\u003cem\u003eNote: As of version 4.14, we are dropping support for Python 2. We love the Python\ncommunity, but Python 2 support was officially halted in Jan 2020. More recently,\nGiHub also dropped support for Python 2, which has made it impossible for us to\nmaintain a consistent level of quality across targets (we use GitHub for our CI).\nLong live Python 3!\u003c/em\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"http://www.antlr.org/api/Java/index.html\" rel=\"nofollow\"\u003eJava API\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"http://www.antlr3.org/\" rel=\"nofollow\"\u003eANTLR v3\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/antlr/antlr4/blob/master/doc/faq/general.md\"\u003ev3 to v4 Migration, differences\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eYou might also find the following pages useful, particularly if you want to mess around with the various target languages.\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/antlr/antlr4/blob/master/doc/building-antlr.md\"\u003eHow to build ANTLR itself\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://github.com/antlr/antlr4/blob/master/doc/releasing-antlr.md\"\u003eHow we create and deploy an ANTLR release\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eThe Definitive ANTLR 4 Reference\u003c/h2\u003e\u003ca id=\"user-content-the-definitive-antlr-4-reference\" class=\"anchor\" aria-label=\"Permalink: The Definitive ANTLR 4 Reference\" href=\"#the-definitive-antlr-4-reference\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eProgrammers run into parsing problems all the time. Whether it’s a data format like JSON, a network protocol like SMTP, a server configuration file for Apache, a PostScript/PDF file, or a simple spreadsheet macro language—ANTLR v4 and this book will demystify the process. ANTLR v4 has been rewritten from scratch to make it easier than ever to build parsers and the language applications built on top. This completely rewritten new edition of the bestselling Definitive ANTLR Reference shows you how to take advantage of these new features.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eYou can buy the book \u003ca href=\"http://amzn.com/dp/1934356999\" rel=\"nofollow\"\u003eThe Definitive ANTLR 4 Reference\u003c/a\u003e at amazon or an \u003ca href=\"https://pragprog.com/book/tpantlr2/the-definitive-antlr-4-reference\" rel=\"nofollow\"\u003eelectronic version at the publisher's site\u003c/a\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eYou will find the \u003ca href=\"http://pragprog.com/titles/tpantlr2/source_code\" rel=\"nofollow\"\u003eBook source code\u003c/a\u003e useful.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eAdditional grammars\u003c/h2\u003e\u003ca id=\"user-content-additional-grammars\" class=\"anchor\" aria-label=\"Permalink: Additional grammars\" href=\"#additional-grammars\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ca href=\"https://github.com/antlr/grammars-v4\"\u003eThis repository\u003c/a\u003e is a collection of grammars without actions where the\nroot directory name is the all-lowercase name of the language parsed\nby the grammar. For example, java, cpp, csharp, c, etc...\u003c/p\u003e\n\u003c/article\u003e","loaded":true,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"ANTLR v4","anchor":"antlr-v4","htmlText":"ANTLR v4"},{"level":2,"text":"Versioning","anchor":"versioning","htmlText":"Versioning"},{"level":2,"text":"Repo branch structure","anchor":"repo-branch-structure","htmlText":"Repo branch structure"},{"level":2,"text":"Authors and major contributors","anchor":"authors-and-major-contributors","htmlText":"Authors and major contributors"},{"level":2,"text":"Useful information","anchor":"useful-information","htmlText":"Useful information"},{"level":2,"text":"The Definitive ANTLR 4 Reference","anchor":"the-definitive-antlr-4-reference","htmlText":"The Definitive ANTLR 4 Reference"},{"level":2,"text":"Additional grammars","anchor":"additional-grammars","htmlText":"Additional 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href="#antlr-v4"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto"><a href="http://java.oracle.com" rel="nofollow"><img src="https://camo.githubusercontent.com/54e9a5749665f2848d5bf92aaaeb07787956bcd576db5af53e78f468bb9f4eec/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6a6176612d31312b2d3463376539662e737667" alt="Java 11+" data-canonical-src="https://img.shields.io/badge/java-11+-4c7e9f.svg" style="max-width: 100%;"></a> <a href="https://raw.githubusercontent.com/antlr/antlr4/master/LICENSE.txt" rel="nofollow"><img src="https://camo.githubusercontent.com/3f9f35c866835373f2429f9db357a9b10435ebff479df3e62b494edb3a2fe933/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6c6963656e73652d4253442d626c75652e737667" alt="License" data-canonical-src="https://img.shields.io/badge/license-BSD-blue.svg" style="max-width: 100%;"></a></p> <p dir="auto"><strong>ANTLR</strong> (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. It's widely used to build languages, tools, and frameworks. From a grammar, ANTLR generates a parser that can build parse trees and also generates a listener interface (or visitor) that makes it easy to respond to the recognition of phrases of interest.</p> <p dir="auto"><strong>Dev branch build status</strong></p> <p dir="auto"><a href="https://github.com/antlr/antlr4/actions/workflows/hosted.yml"><img src="https://github.com/antlr/antlr4/actions/workflows/hosted.yml/badge.svg" alt="MacOSX, Windows, Linux" style="max-width: 100%;"></a> (github actions)</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Versioning</h2><a id="user-content-versioning" class="anchor" aria-label="Permalink: Versioning" href="#versioning"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">ANTLR 4 supports 10 target languages (Cpp, CSharp, Dart, Java, JavaScript, PHP, Python3, Swift, TypeScript, Go), and ensuring consistency across these targets is a unique and highly valuable feature. To ensure proper support of this feature, each release of ANTLR is a complete release of the tool and the 10 runtimes, all with the same version. As such, ANTLR versioning does not strictly follow semver semantics:</p> <ul dir="auto"> <li>a component may be released with the latest version number even though nothing has changed within that component since the previous release</li> <li>major version is bumped only when ANTLR is rewritten for a totally new "generation", such as ANTLR3 -> ANTLR4 (LL(*) -> ALL(*) parsing)</li> <li>minor version updates may include minor breaking changes, the policy is to regenerate parsers with every release (4.11 -> 4.12)</li> <li>backwards compatibility is only guaranteed for patch version bumps (4.11.1 -> 4.11.2)</li> </ul> <p dir="auto">If you use a semver verifier in your CI, you probably want to apply special rules for ANTLR, such as treating minor change as a major change.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Repo branch structure</h2><a id="user-content-repo-branch-structure" class="anchor" aria-label="Permalink: Repo branch structure" href="#repo-branch-structure"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">The default branch for this repo is <a href="https://github.com/antlr/antlr4/tree/master"><code>master</code></a>, which is the latest stable release and has tags for the various releases; e.g., see release tag <a href="https://github.com/antlr/antlr4/tree/4.9.3">4.9.3</a>. Branch <a href="https://github.com/antlr/antlr4/tree/dev"><code>dev</code></a> is where development occurs between releases and all pull requests should be derived from that branch. The <code>dev</code> branch is merged back into <code>master</code> to cut a release and the release state is tagged (e.g., with <code>4.10-rc1</code> or <code>4.10</code>.) Visually our process looks roughly like this:</p> <p dir="auto"><a target="_blank" rel="noopener noreferrer" href="/antlr/antlr4/blob/dev/doc/images/new-antlr-branches.png"><img src="/antlr/antlr4/raw/dev/doc/images/new-antlr-branches.png" width="500" style="max-width: 100%;"></a></p> <p dir="auto">The Go target now has its own dedicated repo:</p> <div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="$ go get github.com/antlr4-go/antlr"><pre>$ go get github.com/antlr4-go/antlr</pre></div> <p dir="auto"><strong>Note</strong> The dedicated Go repo is for <code>go get</code> and <code>import</code> only. Go runtime development is still performed in the main <code>antlr/antlr4</code> repo.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Authors and major contributors</h2><a id="user-content-authors-and-major-contributors" class="anchor" aria-label="Permalink: Authors and major contributors" href="#authors-and-major-contributors"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li><a href="http://www.cs.usfca.edu/~parrt/" rel="nofollow">Terence Parr</a>, <a href="mailto:parrt@cs.usfca.edu">parrt@cs.usfca.edu</a> ANTLR project lead and supreme dictator for life <a href="http://www.usfca.edu/" rel="nofollow">University of San Francisco</a></li> <li><a href="http://tunnelvisionlabs.com/" rel="nofollow">Sam Harwell</a> (Tool co-author, Java and original C# target)</li> <li><a href="https://github.com/ericvergnaud">Eric Vergnaud</a> (Javascript, TypeScript, Python2, Python3 targets and maintenance of C# target)</li> <li><a href="https://github.com/pboyer">Peter Boyer</a> (Go target)</li> <li><a href="http://www.soft-gems.net/" rel="nofollow">Mike Lischke</a> (C++ completed target)</li> <li>Dan McLaughlin (C++ initial target)</li> <li>David Sisson (C++ initial target and test)</li> <li><a href="https://github.com/janyou">Janyou</a> (Swift target)</li> <li><a href="https://github.com/ewanmellor">Ewan Mellor</a>, <a href="https://github.com/hanjoes">Hanzhou Shi</a> (Swift target merging)</li> <li><a href="https://github.com/bhamiltoncx">Ben Hamilton</a> (Full Unicode support in serialized ATN and all languages' runtimes for code points > U+FFFF)</li> <li><a href="https://github.com/marcospassos">Marcos Passos</a> (PHP target)</li> <li><a href="https://github.com/lingyv-li">Lingyu Li</a> (Dart target)</li> <li><a href="https://github.com/KvanTTT">Ivan Kochurkin</a> has made major contributions to overall quality, error handling, and Target performance.</li> <li><a href="https://github.com/jcking">Justin King</a> has done a huge amount of work across multiple targets, but especially for C++.</li> <li><a href="https://github.com/kaby76">Ken Domino</a> has a knack for finding bugs/issues and analysis; also a major contributor on the <a href="https://github.com/antlr/grammars-v4">grammars-v4 repo</a>.</li> <li><a href="https://github.com/jimidle">Jim Idle</a> has contributed to previous versions of ANTLR and recently jumped back in to solve a major problem with the Go target.</li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Useful information</h2><a id="user-content-useful-information" class="anchor" aria-label="Permalink: Useful information" href="#useful-information"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li><a href="https://github.com/antlr/antlr4/releases">Release notes</a></li> <li><a href="https://github.com/antlr/antlr4/blob/master/doc/getting-started.md">Getting started with v4</a></li> <li><a href="http://www.antlr.org/" rel="nofollow">Official site</a></li> <li><a href="https://github.com/antlr/antlr4/blob/master/doc/index.md">Documentation</a></li> <li><a href="https://github.com/antlr/antlr4/blob/master/doc/faq/index.md">FAQ</a></li> <li><a href="https://github.com/antlr/antlr4/blob/master/doc/targets.md">ANTLR code generation targets</a><br>(Currently: Java, C#, Python3, JavaScript, TypeScript, Go, C++, Swift, Dart, PHP)</li> <li><em>Note: As of version 4.14, we are dropping support for Python 2. We love the Python community, but Python 2 support was officially halted in Jan 2020. More recently, GiHub also dropped support for Python 2, which has made it impossible for us to maintain a consistent level of quality across targets (we use GitHub for our CI). Long live Python 3!</em></li> <li><a href="http://www.antlr.org/api/Java/index.html" rel="nofollow">Java API</a></li> <li><a href="http://www.antlr3.org/" rel="nofollow">ANTLR v3</a></li> <li><a href="https://github.com/antlr/antlr4/blob/master/doc/faq/general.md">v3 to v4 Migration, differences</a></li> </ul> <p dir="auto">You might also find the following pages useful, particularly if you want to mess around with the various target languages.</p> <ul dir="auto"> <li><a href="https://github.com/antlr/antlr4/blob/master/doc/building-antlr.md">How to build ANTLR itself</a></li> <li><a href="https://github.com/antlr/antlr4/blob/master/doc/releasing-antlr.md">How we create and deploy an ANTLR release</a></li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">The Definitive ANTLR 4 Reference</h2><a id="user-content-the-definitive-antlr-4-reference" class="anchor" aria-label="Permalink: The Definitive ANTLR 4 Reference" href="#the-definitive-antlr-4-reference"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Programmers run into parsing problems all the time. Whether it’s a data format like JSON, a network protocol like SMTP, a server configuration file for Apache, a PostScript/PDF file, or a simple spreadsheet macro language—ANTLR v4 and this book will demystify the process. ANTLR v4 has been rewritten from scratch to make it easier than ever to build parsers and the language applications built on top. This completely rewritten new edition of the bestselling Definitive ANTLR Reference shows you how to take advantage of these new features.</p> <p dir="auto">You can buy the book <a href="http://amzn.com/dp/1934356999" rel="nofollow">The Definitive ANTLR 4 Reference</a> at amazon or an <a href="https://pragprog.com/book/tpantlr2/the-definitive-antlr-4-reference" rel="nofollow">electronic version at the publisher's site</a>.</p> <p dir="auto">You will find the <a href="http://pragprog.com/titles/tpantlr2/source_code" rel="nofollow">Book source code</a> useful.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Additional grammars</h2><a id="user-content-additional-grammars" class="anchor" aria-label="Permalink: Additional grammars" href="#additional-grammars"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto"><a href="https://github.com/antlr/grammars-v4">This repository</a> is a collection of grammars without actions where the root directory name is the all-lowercase name of the language parsed by the grammar. For example, java, cpp, csharp, c, etc...</p> </article></div></div></div></div></div> <!-- --> <!-- --> <script type="application/json" id="__PRIMER_DATA_:R0:__">{"resolvedServerColorMode":"day"}</script></div> </react-partial> <input type="hidden" data-csrf="true" value="JfkxfuhHAnsPxoPZPs2Dexd7/+XExTgPdtRTNNtjyjzxpGqyL80ru4cniqC2xqMT3IYjm6B/IP8HcdzhksFDug==" /> </div> <div data-view-component="true" class="Layout-sidebar"> <div class="BorderGrid about-margin" data-pjax> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <div class="hide-sm hide-md"> <h2 class="mb-3 h4">About</h2> <p class="f4 my-3"> ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. </p> <div class="my-3 d-flex flex-items-center"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link flex-shrink-0 mr-2"> <path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path> </svg> <span class="flex-auto min-width-0 css-truncate css-truncate-target width-fit"> <a title="http://antlr.org" role="link" target="_blank" rel="noopener noreferrer nofollow" class="text-bold" href="http://antlr.org">antlr.org</a> </span> </div> <h3 class="sr-only">Topics</h3> <div class="my-3"> <div class="f6"> <a href="/topics/javascript" title="Topic: javascript" data-view-component="true" class="topic-tag topic-tag-link"> javascript </a> <a href="/topics/python" title="Topic: python" data-view-component="true" class="topic-tag topic-tag-link"> python </a> <a href="/topics/java" title="Topic: java" data-view-component="true" class="topic-tag topic-tag-link"> java </a> <a href="/topics/dart" title="Topic: dart" data-view-component="true" class="topic-tag topic-tag-link"> dart </a> <a href="/topics/swift" title="Topic: swift" data-view-component="true" class="topic-tag topic-tag-link"> swift </a> <a href="/topics/golang" title="Topic: golang" data-view-component="true" class="topic-tag topic-tag-link"> golang </a> <a href="/topics/php" title="Topic: php" data-view-component="true" class="topic-tag topic-tag-link"> php </a> <a href="/topics/parse" title="Topic: parse" data-view-component="true" class="topic-tag topic-tag-link"> parse </a> <a href="/topics/csharp" title="Topic: csharp" data-view-component="true" class="topic-tag topic-tag-link"> csharp </a> <a href="/topics/parsing" title="Topic: parsing" data-view-component="true" class="topic-tag topic-tag-link"> parsing </a> <a href="/topics/cpp" title="Topic: cpp" data-view-component="true" class="topic-tag topic-tag-link"> cpp </a> <a href="/topics/parser-generator" title="Topic: parser-generator" data-view-component="true" class="topic-tag topic-tag-link"> parser-generator </a> <a href="/topics/grammar" title="Topic: grammar" data-view-component="true" class="topic-tag topic-tag-link"> grammar </a> <a href="/topics/antlr" title="Topic: antlr" data-view-component="true" class="topic-tag topic-tag-link"> antlr </a> <a href="/topics/antlr4" title="Topic: antlr4" data-view-component="true" class="topic-tag topic-tag-link"> antlr4 </a> <a href="/topics/language-recognition" title="Topic: language-recognition" data-view-component="true" class="topic-tag topic-tag-link"> language-recognition </a> </div> </div> <h3 class="sr-only">Resources</h3> <div class="mt-2"> <a class="Link--muted" data-analytics-event="{"category":"Repository 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class="mt-2"> <a href="/antlr/antlr4/custom-properties" data-view-component="true" class="Link Link--muted"><svg text="gray" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-note mr-2"> <path d="M0 3.75C0 2.784.784 2 1.75 2h12.5c.966 0 1.75.784 1.75 1.75v8.5A1.75 1.75 0 0 1 14.25 14H1.75A1.75 1.75 0 0 1 0 12.25Zm1.75-.25a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25v-8.5a.25.25 0 0 0-.25-.25ZM3.5 6.25a.75.75 0 0 1 .75-.75h7a.75.75 0 0 1 0 1.5h-7a.75.75 0 0 1-.75-.75Zm.75 2.25h4a.75.75 0 0 1 0 1.5h-4a.75.75 0 0 1 0-1.5Z"></path> </svg> <span class="color-fg-muted">Custom properties</span></a> </div> <h3 class="sr-only">Stars</h3> <div class="mt-2"> <a href="/antlr/antlr4/stargazers" data-view-component="true" class="Link Link--muted"><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-star mr-2"> <path d="M8 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0V8.5h-1.5A2.25 2.25 0 0 1 3.5 6.25v-.878a2.25 2.25 0 1 1 1.5 0ZM5 3.25a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Zm6.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Zm-3 8.75a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Z"></path> </svg> <strong>3.3k</strong> forks</a> </div> <div class="mt-2"> <a class="Link--muted" href="/contact/report-content?content_url=https%3A%2F%2Fgithub.com%2Fantlr%2Fantlr4&report=antlr+%28user%29"> Report repository </a> </div> </div> </div> </div> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <h2 class="h4 mb-3" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame"> <a href="/antlr/antlr4/releases" data-view-component="true" class="Link--primary no-underline Link">Releases <span title="31" data-view-component="true" class="Counter">31</span></a></h2> <a class="Link--primary d-flex no-underline" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/antlr/antlr4/releases/tag/4.13.2"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-tag flex-shrink-0 mt-1 color-fg-success"> <path d="M1 7.775V2.75C1 1.784 1.784 1 2.75 1h5.025c.464 0 .91.184 1.238.513l6.25 6.25a1.75 1.75 0 0 1 0 2.474l-5.026 5.026a1.75 1.75 0 0 1-2.474 0l-6.25-6.25A1.752 1.752 0 0 1 1 7.775Zm1.5 0c0 .066.026.13.073.177l6.25 6.25a.25.25 0 0 0 .354 0l5.025-5.025a.25.25 0 0 0 0-.354l-6.25-6.25a.25.25 0 0 0-.177-.073H2.75a.25.25 0 0 0-.25.25ZM6 5a1 1 0 1 1 0 2 1 1 0 0 1 0-2Z"></path> </svg> <div class="ml-2 min-width-0"> <div class="d-flex"> <span class="css-truncate css-truncate-target text-bold mr-2" style="max-width: none;">4.13.2</span> <span title="Label: Latest" data-view-component="true" class="Label Label--success flex-shrink-0"> Latest </span> </div> <div class="text-small color-fg-muted"><relative-time datetime="2024-08-03T19:28:03Z" class="no-wrap">Aug 3, 2024</relative-time></div> </div> </a> <div 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