1 files changed, 33 insertions, 0 deletions
diff --git a/src/lib/util.rs b/src/lib/util.rs
new file mode 100644
index 00000000..b8d8ed65
--- /dev/null
+++ b/src/lib/util.rs
@@ -0,0 +1,33 @@
+fn id[T](&T x) -> T {
+    ret x;
+}
+
+/* FIXME (issue #141):  See test/run-pass/constrained-type.rs.  Uncomment
+ * the constraint once fixed. */
+type rational = rec(int num, int den); // : _int::positive(*.den);
+
+fn rational_leq(&rational x, &rational y) -> bool {
+    // NB: Uses the fact that rationals have positive denominators WLOG:
+    ret x.num * y.den <= y.num * x.den;
+}
+
+fn fst[T, U](&tup(T, U) x) -> T {
+    ret x._0;
+}
+
+fn snd[T, U](&tup(T, U) x) -> U {
+    ret x._1;
+}
+
+fn orb(&bool a, &bool b) -> bool {
+    ret a || b;
+}
+
+// Local Variables:
+// mode: rust;
+// fill-column: 78;
+// indent-tabs-mode: nil
+// c-basic-offset: 4
+// buffer-file-coding-system: utf-8-unix
+// compile-command: "make -k -C .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
+// End: