1 files changed, 4 insertions, 0 deletions
diff --git a/tree.h b/tree.h
index c18ccae..70d2ec0 100644
--- a/tree.h
+++ b/tree.h
@@ -25,4 +25,8 @@ void fprintTree(FILE *stream, node *root, int level);
 void printTree(node *root, int level);
 void free_node(node *n);
 
+/// Takes an expression and a bitfield of the
+/// letters' truthiness values
+char eval_tree(node *root, unsigned int alph_bools);
+
 #endif