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Diffstat (limited to 'tests/ui/traits/static-method-generic-inference.rs')
-rw-r--r-- | tests/ui/traits/static-method-generic-inference.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/ui/traits/static-method-generic-inference.rs b/tests/ui/traits/static-method-generic-inference.rs new file mode 100644 index 000000000..f4e94c4f7 --- /dev/null +++ b/tests/ui/traits/static-method-generic-inference.rs @@ -0,0 +1,28 @@ +// Issue #3902. We are (at least currently) unable to infer `Self` +// based on `T`, even though there is only a single impl, because of +// the possibility of associated types and other things (basically: no +// constraints on `Self` here at all). + +mod base { + pub trait HasNew<T> { + fn new() -> T; + fn dummy(&self) { } + } + + pub struct Foo { + dummy: (), + } + + impl HasNew<Foo> for Foo { + fn new() -> Foo { + Foo { dummy: () } + } + } +} + +pub fn foo() { + let _f: base::Foo = base::HasNew::new(); + //~^ ERROR E0790 +} + +fn main() { } |