Please add cl-bnf.

[diasbruno]

Hi,

It is a simple library to write BNF grammars for parsing and building AST.

https://github.com/diasbruno/cl-bnf

[quicklisp]

Does this relate in any way to cl-abnf?

[diasbruno]

Maybe similar. I think the main difference is the callback function to transform each matched rule into a structure (something like haskell's happy does - I guess).

[diasbruno]

Also, I can change the name to avoid confusion or to a name that make more sense. :)