26 lines
379 B
Rust
26 lines
379 B
Rust
use std::ops::{Index, IndexMut};
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struct S;
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struct H;
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impl S {
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fn f(&mut self) {}
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}
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impl Index<u32> for H {
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type Output = S;
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fn index(&self, index: u32) -> &S {
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unimplemented!()
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}
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}
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impl IndexMut<u32> for H {
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fn index_mut(&mut self, index: u32) -> &mut S {
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unimplemented!()
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}
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}
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fn main() {
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H["?"].f(); //~ ERROR mismatched types
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}
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