diff options
Diffstat (limited to 'tests/ui/variance/variance-use-contravariant-struct-2.rs')
-rw-r--r-- | tests/ui/variance/variance-use-contravariant-struct-2.rs | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/tests/ui/variance/variance-use-contravariant-struct-2.rs b/tests/ui/variance/variance-use-contravariant-struct-2.rs new file mode 100644 index 000000000..d4b2d0834 --- /dev/null +++ b/tests/ui/variance/variance-use-contravariant-struct-2.rs @@ -0,0 +1,17 @@ +// Test various uses of structs with distinct variances to make sure +// they permit lifetimes to be approximated as expected. + +#![allow(dead_code)] +// build-pass (FIXME(62277): could be check-pass?) + +struct SomeStruct<T>(fn(T)); + +fn bar<'min,'max>(v: SomeStruct<&'min ()>) + -> SomeStruct<&'max ()> + where 'max : 'min +{ + v +} + + +fn main() { } |