Support for bidirectional parsing? (AST<->string)

[breandan]

I need to parse a string, transform the AST programmatically and unparse back to a string. Can better-parse do this?

edit: Found a similar project that supports the AST->String direction.

edit #2: This is based on a paper by Rendel & Ostermann (2010).

edit #3: Another project for Python. Implementation appears to be fairly lightweight.

edit #4: Two programming languages (TXL, Refal5) that support this kind of rewriting functionality.