Move /src/test to /tests

tests/ui/nullable-pointer-size.rs

@@ -0,0 +1,35 @@
+// run-pass
+
+#![allow(dead_code)]
+
+use std::mem;
+
+enum E<T> { Thing(isize, T), Nothing((), ((), ()), [i8; 0]) }
+struct S<T>(isize, T);
+
+// These are macros so we get useful assert messages.
+
+macro_rules! check_option {
+    ($T:ty) => {
+        assert_eq!(mem::size_of::<Option<$T>>(), mem::size_of::<$T>());
+    }
+}
+
+macro_rules! check_fancy {
+    ($T:ty) => {
+        assert_eq!(mem::size_of::<E<$T>>(), mem::size_of::<S<$T>>());
+    }
+}
+
+macro_rules! check_type {
+    ($T:ty) => {{
+        check_option!($T);
+        check_fancy!($T);
+    }}
+}
+
+pub fn main() {
+    check_type!(&'static isize);
+    check_type!(Box<isize>);
+    check_type!(extern "C" fn());
+}