Initial revision

1 files changed, 27 insertions, 0 deletions

diff --git a/zwgc/eval.h b/zwgc/eval.h
new file mode 100644
index 0000000..9ce6307
--- /dev/null
+++ b/zwgc/eval.h
@@ -0,0 +1,27 @@
+#ifndef eval_MODULE
+#define eval_MODULE
+
+#include "new_string.h"
+
+/*
+ *    string eval_expr(Node *expr)
+ *        Modifies: dict
+ *        Requires: expr is a proper expression (NOT NULL).  (see node.c)
+ *        Effects: Evaluates expr to its string value which is returned.
+ *                 The returned string is on the heap and must be freed
+ *                 eventually.
+ */
+
+extern string eval_expr();
+
+/*
+ *    int eval_bool_expr(Node *expr)
+ *        Modifies: dict
+ *        Requires: expr is a proper expression or NULL.  (see node.c)
+ *        Effects: Evaluates expr to its boolean value which is returned.
+ *                 NULL is defined to have the boolean value true.
+ */
+
+extern int eval_bool_expr();
+
+#endif