mirror of https://github.com/rust-lang/rust
38 lines
864 B
Rust
38 lines
864 B
Rust
// Test various cases where the defaults should lead to errors being
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// reported.
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#![allow(dead_code)]
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trait SomeTrait {
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fn dummy(&self) { }
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}
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struct SomeStruct<'a> {
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r: Box<dyn SomeTrait+'a>
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}
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fn load(ss: &mut SomeStruct) -> Box<dyn SomeTrait> {
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// `Box<SomeTrait>` defaults to a `'static` bound, so this return
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// is illegal.
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ss.r
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//~^ ERROR lifetime may not live long enough
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//~| ERROR cannot move out of
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}
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fn store(ss: &mut SomeStruct, b: Box<dyn SomeTrait>) {
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// No error: b is bounded by 'static which outlives the
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// (anonymous) lifetime on the struct.
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ss.r = b;
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}
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fn store1<'b>(ss: &mut SomeStruct, b: Box<dyn SomeTrait+'b>) {
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// Here we override the lifetimes explicitly, and so naturally we get an error.
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ss.r = b; //~ ERROR explicit lifetime required in the type of `ss` [E0621]
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}
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fn main() {
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}
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