src/librustc/middle/borrowck.rs

   1 use crate::ich::StableHashingContext;
   2 use crate::hir::HirId;
   3 use crate::util::nodemap::FxHashSet;
   4
   5 use rustc_data_structures::stable_hasher::{HashStable, StableHasher,
   6                                            StableHasherResult};
   7
   8 #[derive(Copy, Clone, Debug, RustcEncodable, RustcDecodable)]
   9 pub enum SignalledError { SawSomeError, NoErrorsSeen }
  10
  11 impl Default for SignalledError {
  12     fn default() -> SignalledError {
  13         SignalledError::NoErrorsSeen
  14     }
  15 }
  16
  17 impl_stable_hash_for!(enum self::SignalledError { SawSomeError, NoErrorsSeen });
  18
  19 #[derive(Debug, Default, RustcEncodable, RustcDecodable)]
  20 pub struct BorrowCheckResult {
  21     pub used_mut_nodes: FxHashSet<HirId>,
  22     pub signalled_any_error: SignalledError,
  23 }
  24
  25 impl<'a> HashStable<StableHashingContext<'a>> for BorrowCheckResult {
  26     fn hash_stable<W: StableHasherResult>(&self,
  27                                           hcx: &mut StableHashingContext<'a>,
  28                                           hasher: &mut StableHasher<W>) {
  29         let BorrowCheckResult {
  30             ref used_mut_nodes,
  31             ref signalled_any_error,
  32         } = *self;
  33         used_mut_nodes.hash_stable(hcx, hasher);
  34         signalled_any_error.hash_stable(hcx, hasher);
  35     }
  36 }