X-Git-Url: https://git.distorted.org.uk/~mdw/sod/blobdiff_plain/d5fdd49e70b734b791eb907706f92da5775e2a8b..e895be217c3be6769708da17c9ae87cb22db040e:/doc/syntax.tex

diff --git a/doc/syntax.tex b/doc/syntax.tex
index dd6a5f5..72329a4 100644
--- a/doc/syntax.tex
+++ b/doc/syntax.tex
@@ -903,6 +903,9 @@ Properties:
 \begin{description}
 \item[@|message_class|] A symbol naming the Lisp class to use to represent
   the message.
+\item[@|readonly|] A boolean indicating whether the message guarantees not to
+  modify its receiver.  If this is true, the receiver will be declared
+  @"const".
 \item[@|combination|] A keyword naming the aggregating method combination to
   use.
 \item[@|most_specific|] A keyword, either @`first' or @`last', according to
