mirror of https://github.com/rust-lang/rust
37 lines
818 B
Rust
37 lines
818 B
Rust
// Attempt to change the type as well as unsizing.
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#![feature(unsized_tuple_coercion)]
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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 { fn bar(&self) {} }
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pub fn main() {
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// With a vec of isize.
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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: &Fat<[usize]> = f2;
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//~^ 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: &Fat<dyn Bar> = f2;
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//~^ ERROR `Foo: Bar` is not satisfied
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// Tuple with a vec of isize.
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let f1 = ([1, 2, 3],);
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let f2: &([isize; 3],) = &f1;
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let f3: &([usize],) = f2;
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//~^ 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: &(dyn Bar,) = f2;
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//~^ ERROR `Foo: Bar` is not satisfied
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}
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