20 lines
567 B
Rust
20 lines
567 B
Rust
fn main() {
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let mut p = {a: 1,
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w: {a: 1},
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x: @{a: 1},
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y: @const {a: 1},
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z: @mut{a: 1}};
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// even though `x` is not declared as a mutable field,
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// `p` as a whole is mutable, so it can be modified.
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p.a = 2;
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// this is true for an interior field too
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p.w.a = 2;
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// in these cases we pass through a box, so the mut
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// of the box is dominant
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p.x.a = 2; //! ERROR assigning to immutable field
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p.y.a = 2; //! ERROR assigning to const field
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p.z.a = 2;
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} |