Expression

Expression is a Swift framework for evaluating expressions at runtime on Apple and Linux platforms

The Expression library is split into two parts:

1. The Expression class, which is similar to Foundation’s built-in NSExpression class, but with better support for custom operators, a more Swift-friendly API, and superior performance.
2. AnyExpression, an extension of Expression that handles arbitrary types and provides additional built-in support for common types such as String, Dictionary, Array and Optional.