trivial-ed-functions

A compatibility layer for the ED hook extensions of various Common Lisp implementations.

Usage

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.

Supported Implementations

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*.