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32 lines
761 B
Rust
32 lines
761 B
Rust
// Attempt to change the mutability as well as unsizing.
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struct Fat<T: ?Sized> {
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ptr: T
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}
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struct Foo;
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trait Bar {}
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impl Bar for Foo {}
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pub fn main() {
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// With a vec of ints.
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let f1 = Fat { ptr: [1, 2, 3] };
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let f2: &Fat<[isize; 3]> = &f1;
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let f3: &mut Fat<[isize]> = f2; //~ ERROR mismatched types
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// With a trait.
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let f1 = Fat { ptr: Foo };
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let f2: &Fat<Foo> = &f1;
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let f3: &mut Fat<dyn Bar> = f2; //~ ERROR mismatched types
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// Tuple with a vec of ints.
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let f1 = ([1, 2, 3],);
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let f2: &([isize; 3],) = &f1;
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let f3: &mut ([isize],) = f2; //~ ERROR mismatched types
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// Tuple with a trait.
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let f1 = (Foo,);
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let f2: &(Foo,) = &f1;
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let f3: &mut (dyn Bar,) = f2; //~ ERROR mismatched types
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}
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