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-rw-r--r--tests/ui/structs-enums/enum-discrim-width-stuff.rs44
1 files changed, 44 insertions, 0 deletions
diff --git a/tests/ui/structs-enums/enum-discrim-width-stuff.rs b/tests/ui/structs-enums/enum-discrim-width-stuff.rs
new file mode 100644
index 000000000..f278ae2d0
--- /dev/null
+++ b/tests/ui/structs-enums/enum-discrim-width-stuff.rs
@@ -0,0 +1,44 @@
+// run-pass
+#![allow(overflowing_literals)]
+#![allow(dead_code)]
+
+macro_rules! check {
+ ($m:ident, $t:ty, $v:expr) => {{
+ mod $m {
+ use std::mem::size_of;
+ #[derive(Copy, Clone, Debug)]
+ enum E {
+ V = $v,
+ A = 0
+ }
+ static C: E = E::V;
+ pub fn check() {
+ assert_eq!(size_of::<E>(), size_of::<$t>());
+ assert_eq!(E::V as $t, $v as $t);
+ assert_eq!(C as $t, $v as $t);
+ assert_eq!(format!("{:?}", E::V), "V".to_string());
+ assert_eq!(format!("{:?}", C), "V".to_string());
+ }
+ }
+ $m::check();
+ }}
+}
+
+pub fn main() {
+ check!(a, u8, 0x17);
+ check!(b, u8, 0xe8);
+ check!(c, u16, 0x1727);
+ check!(d, u16, 0xe8d8);
+ check!(e, u32, 0x17273747);
+ check!(f, u32, 0xe8d8c8b8);
+
+ check!(z, i8, 0x17);
+ check!(y, i8, -0x17);
+ check!(x, i16, 0x1727);
+ check!(w, i16, -0x1727);
+ check!(v, i32, 0x17273747);
+ check!(u, i32, -0x17273747);
+
+ enum Simple { A, B }
+ assert_eq!(::std::mem::size_of::<Simple>(), 1);
+}