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10 lines
245 B
Rust
10 lines
245 B
Rust
struct S;
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impl Iterator for S {
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type Item = i32;
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fn next(&mut self) -> Result<i32, i32> { Ok(7) }
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//~^ ERROR method `next` has an incompatible type for trait
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//~| expected `Option<i32>`, found `Result<i32, i32>`
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}
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fn main() {}
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