15 lines
232 B
Rust
15 lines
232 B
Rust
// Test that `&mut T` implements `DerefMut<T>`
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use std::ops::{Deref, DerefMut};
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fn inc<T: Deref<Target=isize> + DerefMut>(mut t: T) {
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*t += 1;
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}
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fn main() {
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let mut x: isize = 5;
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inc(&mut x);
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assert_eq!(x, 6);
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}
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