Expression language and expression evaluation for Go

The simple, stupid rules engine for Java

Melody is a language that compiles to regular expressions and aims to be more readable and maintainable

🦜 Super Expressive is a zero-dependency JavaScript library for building regular expressions in (almost) natural language

Common Expression Language -- specification and binary representation

Fast, portable, non-Turing complete expression evaluation with gradual typing (Go)

Provides an engine that can compile and evaluate expressions

Expressive fixtures generator

:notebook: Books, reference guides and resources on Regular Expressions, CLI one-liners, Scripting Languages and Vim.

Class libraries for XHP. XHP is a Hack feature that augments the syntax of the language such that XML document fragments become valid Hack expressions.

A new, portable, regular expression language

MVEL (MVFLEX Expression Language)

A small extensible programming language designed for concise expression with little code.

NixOS Guide. Learn all about the immutable Nix Operating System and the declarative Nix Expression Language.

A powerful Swift framework for evaluating natural language math expressions

Risor is a fast, embeddable scripting language for Go applications. Add dynamic expressions, filters, and user-defined logic to your Go programs without embedding a heavy runtime like V8 or Python. Expressions compile to bytecode and run on a lightweight VM. Pure Go, minimal dependencies.

A Haskell re-implementation of the Nix expression language

Expression evaluation in golang

Cron expression parser in Go language (golang)

Node-rules is a light weight forward chaining rule engine that can be used in JavaScript and TypeScript based projects.

Javascript Expression Language: Powerful context-based expression parser and evaluator

Common Expression Language interpreter written in Rust

A lightweight, optionally typed expression language with a custom grammar for matching arbitrary Python objects.

A Parsing Expression Grammar (PEG) module, using the D programming language.

A tiny math expression evaluator for the Java programming language

Building regular expressions with natural language

Code for the paper Neural Generation of Regular Expressions from Natural Language with Minimal Domain Knowledge (EMNLP 2016). http://arxiv.org/abs/1608.03000

SeExpr is an embeddable, arithmetic expression language that enables flexible artistic control and customization in creating computer graphics images. Example uses include procedural geometry synthesis, image synthesis, simulation control, crowd animation, and geometry deformation. https://wdas.github.io/SeExpr

A query / expression language for performing computations on JSON-like structures. Built for easy embedding in applications.

A C++ configurable Expression Parser. Useful as a Calculator or for helping you write your own Programming Language