Expr is a statically typed expression engine and domain-specific language for parsing and evaluating dynamic logic strings within Go applications. It functions as a bytecode expression evaluator that executes compiled logic with guaranteed termination and memory safety.
The engine utilizes a specialized compiler and virtual machine to achieve high-performance execution. It employs static type validation during the compilation phase to ensure operand compatibility and prevent runtime crashes.
The project provides a data transformation engine capable of mapping, filtering, and aggregating collections through functional operators. It ensures security by using a pure-function execution model that calculates results without modifying external state or introducing side effects.