src/librustc/ty/binding.rs

   1 // Copyright 2017 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 use hir::BindingAnnotation::*;
  12 use hir::BindingAnnotation;
  13 use hir::Mutability;
  14
  15 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug, Copy)]
  16 pub enum BindingMode {
  17     BindByReference(Mutability),
  18     BindByValue(Mutability),
  19 }
  20
  21 impl BindingMode {
  22     pub fn convert(ba: BindingAnnotation) -> BindingMode {
  23         match ba {
  24             Unannotated => BindingMode::BindByValue(Mutability::MutImmutable),
  25             Mutable => BindingMode::BindByValue(Mutability::MutMutable),
  26             Ref => BindingMode::BindByReference(Mutability::MutImmutable),
  27             RefMut => BindingMode::BindByReference(Mutability::MutMutable),
  28         }
  29     }
  30 }
  31
  32 impl_stable_hash_for!(enum self::BindingMode {
  33     BindByReference(mutability),
  34     BindByValue(mutability)
  35 });