mirror of https://github.com/rust-lang/rust
29 lines
637 B
Rust
29 lines
637 B
Rust
//@ run-pass
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// Test that a `&mut` inside of an `&` is freezable.
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struct MutSlice<'a, T:'a> {
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data: &'a mut [T]
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}
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fn get<'a, T>(ms: &'a MutSlice<'a, T>, index: usize) -> &'a T {
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&ms.data[index]
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}
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pub fn main() {
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let mut data = [1, 2, 3];
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{
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let slice = MutSlice { data: &mut data };
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slice.data[0] += 4;
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let index0 = get(&slice, 0);
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let index1 = get(&slice, 1);
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let index2 = get(&slice, 2);
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assert_eq!(*index0, 5);
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assert_eq!(*index1, 2);
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assert_eq!(*index2, 3);
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}
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assert_eq!(data[0], 5);
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assert_eq!(data[1], 2);
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assert_eq!(data[2], 3);
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}
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