diff options
Diffstat (limited to 'src/test/ui/nll/type-alias-free-regions.rs')
-rw-r--r-- | src/test/ui/nll/type-alias-free-regions.rs | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/test/ui/nll/type-alias-free-regions.rs b/src/test/ui/nll/type-alias-free-regions.rs new file mode 100644 index 000000000..fd5566f35 --- /dev/null +++ b/src/test/ui/nll/type-alias-free-regions.rs @@ -0,0 +1,31 @@ +// Test that we don't assume that type aliases have the same type parameters +// as the type they alias and then panic when we see this. + +type A<'a> = &'a isize; +type B<'a> = Box<A<'a>>; + +struct C<'a> { + f: Box<B<'a>> +} + +trait FromBox<'a> { + fn from_box(b: Box<B>) -> Self; +} + +impl<'a> FromBox<'a> for C<'a> { + fn from_box(b: Box<B>) -> Self { + C { f: b } //~ ERROR + } +} + +trait FromTuple<'a> { + fn from_tuple( b: (B,)) -> Self; +} + +impl<'a> FromTuple<'a> for C<'a> { + fn from_tuple(b: (B,)) -> Self { + C { f: Box::new(b.0) } //~ ERROR + } +} + +fn main() {} |