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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/rust-2021/generic-type-collision.rs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/test/ui/rust-2021/generic-type-collision.rs b/src/test/ui/rust-2021/generic-type-collision.rs new file mode 100644 index 000000000..335e7e520 --- /dev/null +++ b/src/test/ui/rust-2021/generic-type-collision.rs @@ -0,0 +1,18 @@ +// check-pass +// run-rustfix +// edition 2018 +#![warn(rust_2021_prelude_collisions)] + +trait MyTrait<A> { + fn from_iter(x: Option<A>); +} + +impl<T> MyTrait<()> for Vec<T> { + fn from_iter(_: Option<()>) {} +} + +fn main() { + <Vec<i32>>::from_iter(None); + //~^ WARNING trait-associated function `from_iter` will become ambiguous in Rust 2021 + //~^^ WARNING this is accepted in the current edition +} |