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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:20:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:20:29 +0000
commit631cd5845e8de329d0e227aaa707d7ea228b8f8f (patch)
treea1b87c8f8cad01cf18f7c5f57a08f102771ed303 /tests/run-make/extern-fn-with-union/test.rs
parentAdding debian version 1.69.0+dfsg1-1. (diff)
downloadrustc-631cd5845e8de329d0e227aaa707d7ea228b8f8f.tar.xz
rustc-631cd5845e8de329d0e227aaa707d7ea228b8f8f.zip
Merging upstream version 1.70.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/run-make/extern-fn-with-union/test.rs')
-rw-r--r--tests/run-make/extern-fn-with-union/test.rs19
1 files changed, 19 insertions, 0 deletions
diff --git a/tests/run-make/extern-fn-with-union/test.rs b/tests/run-make/extern-fn-with-union/test.rs
new file mode 100644
index 000000000..438fbddf3
--- /dev/null
+++ b/tests/run-make/extern-fn-with-union/test.rs
@@ -0,0 +1,19 @@
+extern crate testcrate;
+
+use std::mem;
+
+extern "C" {
+ fn give_back(tu: testcrate::TestUnion) -> u64;
+}
+
+fn main() {
+ let magic: u64 = 0xDEADBEEF;
+
+ // Let's test calling it cross crate
+ let back = unsafe { testcrate::give_back(mem::transmute(magic)) };
+ assert_eq!(magic, back);
+
+ // And just within this crate
+ let back = unsafe { give_back(mem::transmute(magic)) };
+ assert_eq!(magic, back);
+}