cnp: save point

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

1 files changed, 2 insertions, 1 deletions

diff --git a/src/cnp.h b/src/cnp.h
index 2b0c104..904e383 100644
--- a/src/cnp.h
+++ b/src/cnp.h
@@ -58,6 +58,7 @@ void rtn(Environment *env, NUM X, NUM k, NUM j);
 
 void cnp_call(Environment *env, pair3 label, NUM i, NUM j);
 
-/* TODO: Main algorithm */
+/* On error return NULL */
+H_ATTR Environment *cnp_parse(Grammar *g, str *string);
 
 #endif