mirror of https://github.com/rust-lang/rust
32 lines
619 B
Rust
32 lines
619 B
Rust
// Test that an impl with only one bound region `'a` cannot be used to
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// satisfy a constraint where there are two bound regions.
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trait Foo<X> {
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fn foo(&self, x: X) { }
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}
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fn want_foo2<T>()
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where T : for<'a,'b> Foo<(&'a isize, &'b isize)>
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{
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}
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fn want_foo1<T>()
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where T : for<'z> Foo<(&'z isize, &'z isize)>
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{
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}
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// Expressed as a where clause
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struct SomeStruct;
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impl<'a> Foo<(&'a isize, &'a isize)> for SomeStruct
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{
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}
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fn a() { want_foo1::<SomeStruct>(); } // OK -- foo wants just one region
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fn b() { want_foo2::<SomeStruct>(); }
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//~^ ERROR implementation of
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//~| ERROR implementation of
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fn main() { }
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