46 lines
1.1 KiB
Rust
46 lines
1.1 KiB
Rust
// Copyright 2016 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 #37655. The problem was a false edge created by
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// coercion that wound up requiring that `'a` (in `split()`) outlive
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// `'b`, which shouldn't be necessary.
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#![allow(warnings)]
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trait SliceExt<T> {
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type Item;
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fn get_me<I>(&self, index: I) -> &I::Output
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where I: SliceIndex<Self::Item>;
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}
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impl<T> SliceExt<T> for [T] {
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type Item = T;
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fn get_me<I>(&self, index: I) -> &I::Output
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where I: SliceIndex<T>
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{
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panic!()
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}
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}
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pub trait SliceIndex<T> {
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type Output: ?Sized;
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}
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impl<T> SliceIndex<T> for usize {
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type Output = T;
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}
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fn foo<'a, 'b>(split: &'b [&'a [u8]]) -> &'a [u8] {
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split.get_me(0)
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}
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fn main() { }
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