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Diffstat (limited to 'src/test/ui/nullable-pointer-size.rs')
-rw-r--r-- | src/test/ui/nullable-pointer-size.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/ui/nullable-pointer-size.rs b/src/test/ui/nullable-pointer-size.rs new file mode 100644 index 000000000..0384553b6 --- /dev/null +++ b/src/test/ui/nullable-pointer-size.rs @@ -0,0 +1,35 @@ +// run-pass + +#![allow(dead_code)] + +use std::mem; + +enum E<T> { Thing(isize, T), Nothing((), ((), ()), [i8; 0]) } +struct S<T>(isize, T); + +// These are macros so we get useful assert messages. + +macro_rules! check_option { + ($T:ty) => { + assert_eq!(mem::size_of::<Option<$T>>(), mem::size_of::<$T>()); + } +} + +macro_rules! check_fancy { + ($T:ty) => { + assert_eq!(mem::size_of::<E<$T>>(), mem::size_of::<S<$T>>()); + } +} + +macro_rules! check_type { + ($T:ty) => {{ + check_option!($T); + check_fancy!($T); + }} +} + +pub fn main() { + check_type!(&'static isize); + check_type!(Box<isize>); + check_type!(extern "C" fn()); +} |