8 lines
329 B
Text
8 lines
329 B
Text
let mut x = 4;
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let y = &x;
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*y += 2 // Raises compiler error. Even though x is mutable, y is an immutable reference.
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let y = &mut x;
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*y += 2// Works
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// Note that though y is now a mutable reference, y itself is still immutable e.g.
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let mut z = 5;
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let y = &mut z; // Raises compiler error because y is already assigned to '&mut x'
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