This project is maintained by yitzchak
A compatibility layer for the ED hook extensions of various Common Lisp
implementations.
The main export is trivial-ed-functions:*ed-functions* which is a list of
hook functions. If supported by the current lisp implementation then functions
from the list trivial-ed-functions:*ed-functions* are called in order by
cl:ed with X as an argument until one of them returns non-nil; these
functions are responsible for signalling a file-error to indicate failure to
perform an operation on the file system.
If the current implementation supports *ed-functions* then :ed-functions
will be present in *features*. If the current implementation does not support
*ed-functions* then it is still safe to add a function to the list, but this
function will never be invoked.
Recent versions of ABCL, ACL, CCL, CLASP, ECL, Mezzano, and SBCL all support
*ed-functions* in some way. ABCL, CLASP, ECL, and SBCL include native support.
ACL, CCL, and Mezzano support a single hook function, not a list
of functions. In this case, a hook function is automatically installed that
emulates the behavior of *ed-functions*.