--- a/absyntax/absyntax.hh	Sat Sep 08 10:44:04 2012 +0100
+++ b/absyntax/absyntax.hh	Thu Sep 13 17:12:40 2012 +0100
@@ -166,7 +166,7 @@
  /* a list of symbols... */
 class list_c: public symbol_c {
   public:
-    int c,n;
+    int c,n; /* c: current capacity of list (malloc'd memory);  n: current number of elements in list */
     symbol_c **elements;
 
   public: