prepl is a REPL implementation, also known as a Lisp listener.

It is written in fully portable Common Lisp (aside from minor workarounds for implementation-specific issues...), with major unportable bits being handled by external portability libraries.


git clone


prepl is a fork of SBCL's sb-aclrepl module.

Since then, it has been ported to Clozure CL and other Lisps.

Debugging capabilities have been added.

Overall, PREPL does not have Allegro compatibility as a goal, although it still largely keeps its interface.


Manual startup:

  (asdf:operate 'asdf:load-op 'prepl)

See also

The Qt version of Hemlock uses PREPL in its Slave buffers.


David Lichteblau