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introduce a region unification table and use it in dropck
Fixes #29844
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// http://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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use std::sync::Arc; | ||
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pub struct DescriptorSet<'a> { | ||
pub slots: Vec<AttachInfo<'a, Resources>> | ||
} | ||
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pub trait ResourcesTrait<'r>: Sized { | ||
type DescriptorSet: 'r; | ||
} | ||
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pub struct Resources; | ||
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impl<'a> ResourcesTrait<'a> for Resources { | ||
type DescriptorSet = DescriptorSet<'a>; | ||
} | ||
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pub enum AttachInfo<'a, R: ResourcesTrait<'a>> { | ||
NextDescriptorSet(Arc<R::DescriptorSet>) | ||
} | ||
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fn main() { | ||
let _x = DescriptorSet {slots: Vec::new()}; | ||
} |