X-Git-Url: https://git.distorted.org.uk/~mdw/sod/blobdiff_plain/8ff3d48ed1e9a98e8e051f290463d7d53e676371..refs/heads/mdw/progfmt:/src/method-proto.lisp

diff --git a/src/method-proto.lisp b/src/method-proto.lisp
index 0488374..0a20f39 100644
--- a/src/method-proto.lisp
+++ b/src/method-proto.lisp
@@ -49,6 +49,13 @@
    will be a list of applicable methods sorted in most-to-least specific
    order."))
 
+(export 'sod-message-receiver-type)
+(defgeneric sod-message-receiver-type (message class)
+  (:documentation
+   "Return the type of the `me' argument in a MESSAGE received by CLASS.
+
+   Typically this will just be `CLASS *' or `const CLASS *'."))
+
 (export 'sod-message-applicable-methods)
 (defgeneric sod-message-applicable-methods (message class)
   (:documentation
@@ -340,6 +347,15 @@
 
 (definst convert-to-ilayout (stream :export t)
     (%class chain-head %expr)
+  "Expression to convert EXPR to point to its enclosing `ilayout'.
+
+   Given a pointer EXPR which points into a direct instance of CLASS,
+   specifically to the `ichain' whose head class is CHAIN-HEAD, evaluate the
+   base address of the enclosing `ilayout' structure.
+
+   The output looks like:
+
+	SOD_ILAYOUT(CLASS, NICK, EXPR)"
   (format stream "SOD_ILAYOUT(~@<~A, ~_~A, ~_~A~:>)"
 	  class (sod-class-nickname chain-head) expr))