18 lines
442 B
Rust
18 lines
442 B
Rust
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enum box_impl<T> = {
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mut f: T
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};
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fn set_box_impl<T>(b: box_impl<@const T>, v: @const T) {
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b.f = v;
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}
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fn main() {
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let b = box_impl::<@int>({mut f: @3});
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set_box_impl(b, @mut 5);
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//!^ ERROR values differ in mutability
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// No error when type of parameter actually IS @const int
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let x: @const int = @3; // only way I could find to upcast
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let b = box_impl::<@const int>({mut f: x});
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set_box_impl(b, @mut 5);
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}
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