mirror of https://github.com/rust-lang/rust
52 lines
1.0 KiB
Rust
52 lines
1.0 KiB
Rust
// Test that we can derive lifetime bounds on `Self` from trait
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// inheritance.
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trait Static : 'static { }
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trait Is<'a> : 'a { }
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struct Inv<'a> {
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x: Option<&'a mut &'a isize>
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}
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fn check_bound<'a,A:'a>(x: Inv<'a>, a: A) { }
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// In these case, `Self` inherits `'static`.
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trait InheritsFromStatic : Sized + 'static {
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fn foo1<'a>(self, x: Inv<'a>) {
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check_bound(x, self)
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}
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}
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trait InheritsFromStaticIndirectly : Sized + Static {
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fn foo1<'a>(self, x: Inv<'a>) {
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check_bound(x, self)
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}
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}
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// In these case, `Self` inherits `'a`.
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trait InheritsFromIs<'a> : Sized + 'a {
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fn foo(self, x: Inv<'a>) {
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check_bound(x, self)
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}
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}
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trait InheritsFromIsIndirectly<'a> : Sized + Is<'a> {
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fn foo(self, x: Inv<'a>) {
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check_bound(x, self)
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}
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}
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// In this case, `Self` inherits nothing.
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trait InheritsFromNothing<'a> : Sized {
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fn foo(self, x: Inv<'a>) {
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check_bound(x, self)
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//~^ ERROR parameter type `Self` may not live long enough
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}
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}
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fn main() { }
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