mirror of https://github.com/rust-lang/rust
35 lines
786 B
Rust
35 lines
786 B
Rust
// Test that attempts to implicitly coerce a value into an
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// object respect the lifetime bound on the object type.
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trait Foo {}
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impl<'a> Foo for &'a [u8] {}
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fn a(v: &[u8]) -> Box<dyn Foo + 'static> {
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let x: Box<dyn Foo + 'static> = Box::new(v);
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//~^ ERROR lifetime may not live long enough
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x
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}
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fn b(v: &[u8]) -> Box<dyn Foo + 'static> {
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Box::new(v)
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//~^ ERROR lifetime may not live long enough
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}
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fn c(v: &[u8]) -> Box<dyn Foo> {
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// same as previous case due to RFC 599
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Box::new(v)
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//~^ ERROR lifetime may not live long enough
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}
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fn d<'a,'b>(v: &'a [u8]) -> Box<dyn Foo+'b> {
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Box::new(v)
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//~^ ERROR lifetime may not live long enough
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}
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fn e<'a:'b,'b>(v: &'a [u8]) -> Box<dyn Foo+'b> {
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Box::new(v) // OK, thanks to 'a:'b
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}
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fn main() { }
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