mirror of https://github.com/rust-lang/rust
29 lines
764 B
Rust
29 lines
764 B
Rust
//@ run-pass
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#![allow(dead_code)]
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// Test a corner case of LUB coercion. In this case, one arm of the
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// match requires a deref coercion and the other doesn't, and there
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// is an extra `&` on the `rc`. We want to be sure that the lifetime
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// assigned to this `&rc` value is not `'a` but something smaller. In
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// other words, the type from `rc` is `&'a Rc<String>` and the type
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// from `&rc` should be `&'x &'a Rc<String>`, where `'x` is something
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// small.
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use std::rc::Rc;
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#[derive(Clone)]
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enum Cached<'mir> {
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Ref(&'mir String),
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Owned(Rc<String>),
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}
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impl<'mir> Cached<'mir> {
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fn get_ref<'a>(&'a self) -> &'a String {
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match *self {
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Cached::Ref(r) => r,
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Cached::Owned(ref rc) => &rc,
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}
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}
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}
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fn main() { }
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