A typed expression engine using postfix notation, normalized results, complex numbers, and calculation steps.

A fully streaming regular expression engine

Core logic engine for copilot bot card SDK — no UI, pure logic (Expression Engine, Action Runner, Schema Parser, Lifecycle Manager)

Ultra-high-performance mathematical expression engine with JIT compilation (~2.5M+ ops/s), CSP-safe VM mode, Pratt parser, and zero dependencies. Evaluate dynamic formulas safely without eval().

Scientific Expression Engine - Vue 3 components (FormulaEditor, Toolbar, SymbolPanel)

A JavaScript expression engine for JSON-based dynamic computations and function composition

Simple expression engine without external dependencies:

Makeen Expression Engine

EasyLegal field taxonomy, expression engine, resolver, and validator — pure and deterministic

Expression engine for dynamic variable evaluation with date arithmetic support

Safe JSON expression engine — JSONata wrapper with compile-once evaluation and DoS guards

Bindings for RE2: fast, safe alternative to backtracking regular expression engines.

Spotto's Excel-like expression engine (TypeScript port, kept in lock-step with the Go excelexp reference)

A lexical analysis / regular expression engine written in TypeScript

A standalone speech rule engine for XML structures, based on the original engine from ChromeVox.

Helper function to optimise call expression

Core logic engine for Zentto Studio — runtime UI builder. Schema validation, expression engine, data binding, and rule evaluation.

Scientific Expression Engine - AI Provider SPI interfaces & built-in fallbacks

Helper function to replace certain member expressions with function calls

Helper which skips types and parentheses