X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/sod/blobdiff_plain/97d10f8b1f631cd32ea5ac9118b253cb4142d391..01778b39c53316dda3f757c49276d034039ee9cb:/src/method-proto.lisp

diff --git a/src/method-proto.lisp b/src/method-proto.lisp
index e85f62a..a986584 100644
--- a/src/method-proto.lisp
+++ b/src/method-proto.lisp
@@ -69,8 +69,8 @@ (defgeneric method-keyword-argument-lists (method direct-methods)
    "Returns a list of keyword argument lists to be merged.
 
    This should return a list suitable for passing to `merge-keyword-lists',
-   i.e., each element should be a pair consisting of a list of `argument'
-   objects and a string describing the source of the argument list."))
+   i.e., each element should be a pair consisting of a string describing the
+   source of the argument list, and a list of `argument' objects."))
 
 (export 'compute-sod-effective-method)
 (defgeneric compute-sod-effective-method (message class)
@@ -147,6 +147,16 @@ (defgeneric sod-message-argument-tail (message)
 
    No `me' argument is prepended; any `:ellipsis' is left as it is."))
 
+(export 'sod-method-description)
+(defgeneric sod-method-description (method)
+  (:documentation
+   "Return an adjectival phrase describing METHOD.
+
+    The result will be placed into an error message reading something like
+    ``Conflicting definition of DESCRIPTION direct method `bogus'''.  Two
+    direct methods which can coexist in the same class, defined on the same
+    message, should have differing descriptions."))
+
 (export 'sod-method-function-type)
 (defgeneric sod-method-function-type (method)
   (:documentation