38 lines
1.1 KiB
Rust
38 lines
1.1 KiB
Rust
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// test for https://github.com/rust-lang/rust/issues/86940
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// run-rustfix
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// edition:2018
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// check-pass
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#![warn(rust_2021_prelude_collisions)]
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#![allow(dead_code)]
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#![allow(unused_imports)]
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struct Generic<T, U>(T, U);
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trait MyFromIter {
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fn from_iter(_: i32) -> Self;
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}
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impl MyFromIter for Generic<i32, i32> {
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fn from_iter(x: i32) -> Self {
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Self(x, x)
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}
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}
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impl std::iter::FromIterator<i32> for Generic<i32, i32> {
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fn from_iter<T: IntoIterator<Item = i32>>(_: T) -> Self {
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todo!()
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}
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}
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fn main() {
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Generic::from_iter(1);
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//~^ WARNING trait-associated function `from_iter` will become ambiguous in Rust 2021
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//~| this is accepted in the current edition (Rust 2018)
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Generic::<i32, i32>::from_iter(1);
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//~^ WARNING trait-associated function `from_iter` will become ambiguous in Rust 2021
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//~| this is accepted in the current edition (Rust 2018)
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Generic::<_, _>::from_iter(1);
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//~^ WARNING trait-associated function `from_iter` will become ambiguous in Rust 2021
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//~| this is accepted in the current edition (Rust 2018)
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}
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