(Fexpand_abbrev): If expanding an abbrev which has only

a hook, and the hook has a non-nil `no-self-insert' property, let
the return value of the hook specify whether an expansion took
place.  If it returns nil, no expansion has been performed.

1 files changed, 14 insertions, 1 deletions

diff --git a/src/abbrev.c b/src/abbrev.c
index e3ee9e039b2..f5586f5c4d7 100644
--- a/src/abbrev.c
+++ b/src/abbrev.c
@@ -364,7 +364,20 @@ Returns the abbrev symbol, if expansion took place.")
 
   hook = XSYMBOL (sym)->function;
   if (!NILP (hook))
-    call0 (hook);
+    {
+      Lisp_Object expanded, prop;
+
+      /* If expanding an abbrev which has only a hook, and the hook
+         has a non-nil `no-self-insert' property, let the return value
+         of the hook specify whether an expansion took place.  If it
+         returns nil, no expansion has been done.  */
+      expanded = call0 (hook);
+      if (SYMBOLP (hook)
+          && NILP (expanded)
+          && (prop = Fget (hook, intern ("no-self-insert")),
+              !NILP (prop)))
+        value = Qnil;
+    }
 
   return value;
 }