mirror of https://github.com/rust-lang/rust
42 lines
1.0 KiB
Rust
42 lines
1.0 KiB
Rust
// check that associated consts can assume the impl header is well-formed.
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trait Foo<'a, 'b, T>: Sized {
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const EVIL: fn(u: &'b u32) -> &'a u32;
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}
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struct Evil<'a, 'b: 'a>(Option<&'a &'b ()>);
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impl<'a, 'b> Foo<'a, 'b, Evil<'a, 'b>> for () {
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const EVIL: fn(&'b u32) -> &'a u32 = { |u| u };
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}
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struct IndirectEvil<'a, 'b: 'a>(Option<&'a &'b ()>);
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impl<'a, 'b> Foo<'a, 'b, ()> for IndirectEvil<'a, 'b> {
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const EVIL: fn(&'b u32) -> &'a u32 = { |u| u };
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}
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impl<'a, 'b> Evil<'a, 'b> {
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const INHERENT_EVIL: fn(&'b u32) -> &'a u32 = { |u| u };
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}
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// while static methods can *assume* this, we should still
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// *check* that it holds at the use site.
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fn evil<'a, 'b>(b: &'b u32) -> &'a u32 {
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<()>::EVIL(b)
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//~^ ERROR lifetime may not live long enough
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}
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fn indirect_evil<'a, 'b>(b: &'b u32) -> &'a u32 {
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<IndirectEvil>::EVIL(b)
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//~^ ERROR lifetime may not live long enough
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}
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fn inherent_evil<'a, 'b>(b: &'b u32) -> &'a u32 {
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<Evil>::INHERENT_EVIL(b)
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//~^ ERROR lifetime may not live long enough
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}
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fn main() {}
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