functionClauseList_add (/*@returned@*/ functionClauseList p_s, /*@keep@*/ functionClause p_el)
/*@modifies p_s@*/ ;
-extern functionClauseList
- functionClauseList_prepend (/*@returned@*/ functionClauseList p_s, /*@keep@*/ functionClause p_el)
+extern /*@only@*/ functionClauseList
+ functionClauseList_prepend (/*@only@*/ functionClauseList p_s, /*@keep@*/ functionClause p_el)
/*@modifies p_s@*/ ;
extern /*@unused@*/ /*@only@*/ cstring functionClauseList_unparse (functionClauseList p_s) ;