6dfeda7d4b
table, introduce a `FreeRegionMap` data structure. regionck computes the `FreeRegionMap` for each fn and stores the result into the tcx so that borrowck can use it (this could perhaps be refactored to have borrowck recompute the map, but it's a bid tedious to recompute due to the interaction of closures and free fns). The main reason to do this is because of #22779 -- using a global table was incorrect because when validating impl method signatures, we want to use the free region relationships from the *trait*, not the impl. Fixes #22779.
26 lines
844 B
Rust
26 lines
844 B
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Regression test for issue #22779. An extra where clause was
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// permitted on the impl that is not present on the trait.
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trait Tr<'a, T> {
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fn renew<'b: 'a>(self) -> &'b mut [T];
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}
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impl<'a, T> Tr<'a, T> for &'a mut [T] {
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fn renew<'b: 'a>(self) -> &'b mut [T] where 'a: 'b {
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//~^ ERROR lifetime bound not satisfied
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&mut self[..]
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}
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}
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fn main() { }
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