diff lab0/tree.mli @ 0:bfdcc3820b32

Basis
author Mike Spivey <mike@cs.ox.ac.uk>
date Thu, 05 Oct 2017 08:04:15 +0100
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lab0/tree.mli	Thu Oct 05 08:04:15 2017 +0100
@@ -0,0 +1,11 @@
+(* lab1/tree.mli *)
+(* Copyright (c) 2017 J. M. Spivey *)
+
+(* Abstract syntax *)
+
+type expr =
+    Number of float             (* Constant (value) *)
+  | Variable of string          (* Variable (name) *)
+  | Binop of op * expr * expr   (* Binary operator *)
+
+and op = Plus | Minus | Times | Divide