Add another discriminant-size-related test, this time with fields.

Author: jld

src/test/run-pass/small-enums-with-fields.rs

@@ -0,0 +1,41 @@
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[feature(macro_rules)];
+
+use std::mem::size_of;
+
+macro_rules! check {
+    ($t:ty, $sz:expr, $($e:expr, $s:expr),*) => {{
+        assert_eq!(size_of::<$t>(), $sz);
+        $({
+            static S: $t = $e;
+            let v: $t = $e;
+            assert_eq!(S, v);
+            assert_eq!(format!("{:?}", v), ~$s);
+            assert_eq!(format!("{:?}", S), ~$s);
+        });*
+    }}
+}
+
+pub fn main() {
+    check!(Option<u8>, 2,
+           None, "None",
+           Some(129u8), "Some(129u8)");
+    check!(Option<i16>, 4,
+           None, "None",
+           Some(-20000i16), "Some(-20000i16)");
+    check!(Either<u8, i8>, 2,
+           Left(132u8), "Left(132u8)",
+           Right(-32i8), "Right(-32i8)");
+    check!(Either<u8, i16>, 4,
+           Left(132u8), "Left(132u8)",
+           Right(-20000i16), "Right(-20000i16)");
+}