XFormula

Highly customizable language front-end, aimed to be a base for custom DSL evaluators.

Developer note: I've created this library to use in many of my projects and decided to publish the source code, because it may help somebody to write a DSL compiler or evaluator can get benefit from Python ecosystem, within a reasonable time.

I couldn't write documentation because of my tight schedule in these days. But I see the code as self-explanatory, feel free to read it if you're interested.

In the meantime, please note that this project is still in development.

Features:

• Built on top of Lark Parser Toolkit
• • LALR(1), Earley and CYK parsing algorithms are supported by Lark; XFormula uses LALR(1) by default
• Automatic EBNF grammar generator via declarative Python functions (The final grammar generated using the default features can be found in out/Grammar.lark file)
• Modular featurization system to manipulate grammar and parser context dynamically.
• A ready-to-use compact dialect that supports some general purpose data types and basic symbols (See xformula.syntax.ast package)

See xformula.syntax.core.features package and xformula.syntax.core.operations.default_operator_precedences module for more information about the default behaviours.

License

MIT