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20 lines
511 B
Rust
20 lines
511 B
Rust
//@ build-pass
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//@ compile-flags: -Copt-level=1 --crate-type=lib
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#![feature(specialization)]
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//~^ WARN the feature `specialization` is incomplete
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pub unsafe trait Storage {
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type Handle;
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}
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pub unsafe trait MultipleStorage: Storage {}
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default unsafe impl<S> Storage for S where S: MultipleStorage {}
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// Make sure that we call is_freeze on `(S::Handle,)` in the param-env of `ice`,
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// instead of in an empty, reveal-all param-env.
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pub fn ice<S: Storage>(boxed: (S::Handle,)) -> (S::Handle,) {
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boxed
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}
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