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Diffstat (limited to 'src/test/ui/packed/packed-tuple-struct-layout.rs')
-rw-r--r--src/test/ui/packed/packed-tuple-struct-layout.rs23
1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/packed/packed-tuple-struct-layout.rs b/src/test/ui/packed/packed-tuple-struct-layout.rs
new file mode 100644
index 000000000..931be5b94
--- /dev/null
+++ b/src/test/ui/packed/packed-tuple-struct-layout.rs
@@ -0,0 +1,23 @@
+// run-pass
+use std::mem;
+
+#[repr(packed)]
+#[allow(unused_tuple_struct_fields)]
+struct S4(u8,[u8; 3]);
+
+#[repr(packed)]
+#[allow(unused_tuple_struct_fields)]
+struct S5(u8,u32);
+
+pub fn main() {
+ unsafe {
+ let s4 = S4(1, [2,3,4]);
+ let transd : [u8; 4] = mem::transmute(s4);
+ assert_eq!(transd, [1, 2, 3, 4]);
+
+ let s5 = S5(1, 0xff_00_00_ff);
+ let transd : [u8; 5] = mem::transmute(s5);
+ // Don't worry about endianness, the u32 is palindromic.
+ assert_eq!(transd, [1, 0xff, 0, 0, 0xff]);
+ }
+}