851c77088d
This PR kicks off the implementation of the [default binding modes RFC][1] by introducing the `pat_binding_modes` typeck table mentioned in the [mentoring instructions][2]. `pat_binding_modes` is populated in `librustc_typeck/check/_match.rs` and used wherever the HIR would be scraped prior to this PR. Unfortunately, one blemish, namely a two callers to `contains_explicit_ref_binding`, remains. This will likely have to be removed when the second part of [1], the `pat_adjustments` table, is tackled. Appropriate comments have been added. See #42640. [1]: https://github.com/rust-lang/rfcs/pull/2005 [2]: https://github.com/rust-lang/rust/issues/42640#issuecomment-313535089
35 lines
1.2 KiB
Rust
35 lines
1.2 KiB
Rust
// Copyright 2017 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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use hir::BindingAnnotation::*;
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use hir::BindingAnnotation;
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use hir::Mutability;
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#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug, Copy)]
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pub enum BindingMode {
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BindByReference(Mutability),
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BindByValue(Mutability),
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}
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impl BindingMode {
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pub fn convert(ba: BindingAnnotation) -> BindingMode {
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match ba {
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Unannotated => BindingMode::BindByValue(Mutability::MutImmutable),
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Mutable => BindingMode::BindByValue(Mutability::MutMutable),
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Ref => BindingMode::BindByReference(Mutability::MutImmutable),
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RefMut => BindingMode::BindByReference(Mutability::MutMutable),
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}
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}
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}
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impl_stable_hash_for!(enum self::BindingMode {
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BindByReference(mutability),
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BindByValue(mutability)
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});
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