Language
Sol3 (sol2 v3.0) - a C++ <-> Lua API wrapper with advanced features and top notch performance - is here, and it's great! Documentation:
Learn Rust dark magics by implementing an expression framework in database systems
PRQL is a modern language for transforming data — a simple, powerful, pipelined SQL replacement
A library for pattern matching on symbolic expressions in Python.
Minimal, efficient, statically-typed and meta-programmable systems programming language heavily inspired by Lua, which compiles to C and native code.
General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
A lightweight python code protector, makes your python project harder to reverse engineer
The Boehm-Demers-Weiser conservative C/C++ Garbage Collector (bdwgc, also known as bdw-gc, boehm-gc, libgc)
A statically-typed functional language with generics, typeclasses, sum types, pattern-matching, first-class functions, currying, algebraic effects, associated types, good diagnostics, etc.
Write expressive, high-performance parsers with ease.
Embedded Scripting Language Designed for C++
A fast, small, safe, gradually typed embeddable scripting language derived from Lua
A single file C++ header-only PEG (Parsing Expression Grammars) library
Mathematical Expression Parser and JIT Compiler
Shader-Like Mathematical Expression JIT Engine for C++ Language
Carbon Language's main repository: documents, design, implementation, and related tools. (NOTE: Carbon Language is experimental; see README)
Python library which enables complex compositions of language models such as scratchpads, chain of thought, tool use, selection-inference, and more.
Common Expression Language -- specification and binary representation
Fast, portable, non-Turing complete expression evaluation (C++)