Top 85 pattern-matching open source projects

🧮 A research programming language on top of C macros

An Open Source Implementation of the Actor Model in C++

Julia functional programming infrastructures and metaprogramming facilities

A pattern matching library for Nim

Pattern Matcher Compatible with Optima

Variable assignment with zeal! (or multiple, unpacking, and destructuring assignment in R)

Hexrays Toolbox - Find code patterns within the Hexrays AST

Distributed Graph Analytics with Apache Flink

Expression rewriting and simplification

First-class patterns for Clojure. Made with love, functions, and just the right amount of syntax.

☕️ Symja - computer algebra language & symbolic math library. A collection of popular algorithms implemented in pure Java.

Monad, Functional Programming features for Golang

A Ruby gem for non-linear pattern-matching with backtracking

Reusable, composable patterns across Elixir libraries

Eval is a lightweight interpreter framework written in Swift, evaluating expressions at runtime

Scala-like pattern matching for Java 8

Rosie Pattern Language (RPL) and the Rosie Pattern Engine have MOVED!

STUMPY is a powerful and scalable Python library for modern time series analysis

Pattern Matching for Javascript

🍇 Syntax-aware grep-like for Clojure

bem-xjst (eXtensible JavaScript Templates): declarative template engine for the browser and server

A library for pattern matching on symbolic expressions in Python.

⚡ Pattern Matching in Typescript

Qutuf (قُطُوْف): An Arabic Morphological analyzer and Part-Of-Speech tagger as an Expert System.

Fast, minimal glob matcher for node.js. Similar to micromatch, minimatch and multimatch, but without support for extended globs (extglobs), posix brackets or braces, and with complete Bash 4.3 wildcard support: ("*", "**", and "?").

Elixir-style pattern matching for ruby methods

Glob for C++17

Pattern matching for JavaScript inspired by one of the great features of the Haskell language. Suitable for browsers or node.js.

Functional programming style pattern-matching library for C++

(WIP) Dependently-typed programming language with Agda style dependent pattern matching

Ruby port of some Scala's monads

A DSL for method overloading in Ruby based on pattern matching

Expression transformation package

Incremental view maintenance for openCypher graph queries.

🎨 A complete Pattern Matching library for TypeScript, with smart type inference.

OCaml bindings to PCRE (Perl Compatibility Regular Expressions)

The Egison Programming Language

Super tiny and ~350% faster alternative to node-glob

Tools for transparent data transformation

Pampy.js: Pattern Matching for JavaScript

This is an experimental library that has evolved to P1371, proposed for C++23.

A macro to define clojure functions with parameter pattern matching just like erlang or elixir.

In this article I try to explain why Haskell keeps being such an important language by presenting some of its most important and distinguishing features and detailing them with working code examples. The presentation aims to be self-contained and does not require any previous knowledge of the language.

Qo - Query Object - Pattern matching and fluent querying in Ruby

Pampy: The Pattern Matching for Python you always dreamed of.

The implementation of the Rascal meta-programming language (including interpreter, type checker, parser generator, compiler and JVM based run-time system)

Simple pattern-matching library for Clojure(Script)

Simple pattern matching in Typescript

Library created for testing JSON against patterns.

Pattern matching for the monads in the cats Clojure library

TypeScript does not have any pattern matching functionality built in. This article shows several ways how you can replicate the core of a simple pattern matcher using a few simple structures and functions within TypeScript. Resulting code will have improved maintainability and better runtime type safety when done right.

tasty feature extensions for python3(NO MAINTENANCE!).

String helper methods and an inflector

Minimalist dependency injection library for Python that embraces type annotations syntax

(De)multiplex asynchronous streams

JavaScript functional conditional expression

A fragmentary bidirectional type system as a Python library

the minimal grammar, high performance JavaScript pattern matching implementation

Learning with Peter Norvig's lis.py interpreter

Programming language for symbolic computation with unusual combination of pattern matching features: Tree patterns, associative patterns and expressions embedded in patterns.