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-rw-r--r--tests/ui/structs-enums/enum-discrim-autosizing.rs53
1 files changed, 53 insertions, 0 deletions
diff --git a/tests/ui/structs-enums/enum-discrim-autosizing.rs b/tests/ui/structs-enums/enum-discrim-autosizing.rs
new file mode 100644
index 000000000..f68fdda60
--- /dev/null
+++ b/tests/ui/structs-enums/enum-discrim-autosizing.rs
@@ -0,0 +1,53 @@
+// run-pass
+#![allow(dead_code)]
+#![allow(overflowing_literals)]
+
+use std::mem::size_of;
+
+enum Ei8 {
+ Ai8 = -1,
+ Bi8 = 0
+}
+
+enum Eu8 {
+ Au8 = 0,
+ Bu8 = 0x80
+}
+
+enum Ei16 {
+ Ai16 = -1,
+ Bi16 = 0x80
+}
+
+enum Eu16 {
+ Au16 = 0,
+ Bu16 = 0x8000
+}
+
+enum Ei32 {
+ Ai32 = -1,
+ Bi32 = 0x8000
+}
+
+enum Eu32 {
+ Au32 = 0,
+ Bu32 = 0x8000_0000
+}
+
+enum Ei64 {
+ Ai64 = -1,
+ Bi64 = 0x8000_0000
+}
+
+pub fn main() {
+ assert_eq!(size_of::<Ei8>(), 1);
+ assert_eq!(size_of::<Eu8>(), 1);
+ assert_eq!(size_of::<Ei16>(), 2);
+ assert_eq!(size_of::<Eu16>(), 2);
+ assert_eq!(size_of::<Ei32>(), 4);
+ assert_eq!(size_of::<Eu32>(), 4);
+ #[cfg(target_pointer_width = "64")]
+ assert_eq!(size_of::<Ei64>(), 8);
+ #[cfg(target_pointer_width = "32")]
+ assert_eq!(size_of::<Ei64>(), 4);
+}