+ {
+ Lisp_Object expanded, prop;
+
+ /* If the abbrev has a hook function, run it. */
+ expanded = call0 (hook);
+
+ /* In addition, if the hook function is a symbol with a a
+ non-nil `no-self-insert' property, let the value it returned
+ specify whether we consider that an expansion took place. If
+ it returns nil, no expansion has been done. */
+
+ if (SYMBOLP (hook)
+ && NILP (expanded)
+ && (prop = Fget (hook, intern ("no-self-insert")),
+ !NILP (prop)))
+ value = Qnil;
+ }