diff options
Diffstat (limited to 'tests/run-make/extern-fn-with-union/test.rs')
-rw-r--r-- | tests/run-make/extern-fn-with-union/test.rs | 19 |
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); +} |