cnp: save point

Now we need to implement predicates, in order to have practical
applications.

1 files changed, 12 insertions, 1 deletions

diff --git a/src/grammar.c b/src/grammar.c
index 3b5a959..afb9353 100644
--- a/src/grammar.c
+++ b/src/grammar.c
@@ -44,6 +44,15 @@ rg_nth(CCR_MOD(Rule_group *) rg, NUM n)
   return (List *) list_nth(rg->rights, n);
 }
 
+struct PT_DATA_s {
+  dfa *dfap;
+  /* NULL-terminated strings */
+  char *user_name;
+  char *raw_name;
+};
+
+typedef struct PT_DATA_s PTD;
+
 /* TODO: Add some statistic counts to assist the hash tables.  For
    example, store the total number of terminals as an integer; then
    the hash table can be hinted at initialization to contain that many
@@ -63,7 +72,8 @@ struct Grammar_s {
 
      To print them, first encode them into normal strings. */
   List *names;
-  /* TODO: Add an array of predicates. */
+  /* an array of predicates. */
+  PTD *predicates;
 };
 
 static void
@@ -179,6 +189,7 @@ BOOL
 build_grammar(Grammar *g, const List *rules, CC_MOD(List *) names)
 {
   g->names = (List *) names;
+  g->predicates = NULL;
 
   NUM len = list_length(names);
   NUM rule_len = list_length(rules);