Common Lisp the Language, 2nd Edition
For commonly used restarts, it is conventional to define a program interface
that hides the use of invoke-restart. Such program interfaces to restarts
are called restart functions.
The normal convention is for the function to share the name of the restart. The pre-defined functions abort, continue, muffle-warning, store-value, and use-value are restart functions. With use-value the above example of handler-bind could have been written more concisely as
(handler-bind ((unbound-variable
#'(lambda (c) ;Argument c is a condition
(use-value (cell-error-name c)))))
body)
