compiler/rustc_middle/src/mir/type_foldable.rs

   1 //! `TypeFoldable` implementations for MIR types
   2
   3 use rustc_ast::InlineAsmTemplatePiece;
   4
   5 use super::*;
   6 use crate::ty;
   7
   8 TrivialTypeTraversalAndLiftImpls! {
   9     BlockTailInfo,
  10     MirPhase,
  11     SourceInfo,
  12     FakeReadCause,
  13     RetagKind,
  14     SourceScope,
  15     SourceScopeLocalData,
  16     UserTypeAnnotationIndex,
  17     BorrowKind,
  18     CastKind,
  19     BinOp,
  20     NullOp,
  21     UnOp,
  22     hir::Movability,
  23     BasicBlock,
  24     SwitchTargets,
  25     GeneratorKind,
  26     GeneratorSavedLocal,
  27 }
  28
  29 TrivialTypeTraversalImpls! {
  30     for <'tcx> {
  31         ConstValue<'tcx>,
  32     }
  33 }
  34
  35 impl<'tcx> TypeFoldable<'tcx> for &'tcx [InlineAsmTemplatePiece] {
  36     fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, _folder: &mut F) -> Result<Self, F::Error> {
  37         Ok(self)
  38     }
  39 }
  40
  41 impl<'tcx> TypeFoldable<'tcx> for &'tcx [Span] {
  42     fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, _folder: &mut F) -> Result<Self, F::Error> {
  43         Ok(self)
  44     }
  45 }
  46
  47 impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<PlaceElem<'tcx>> {
  48     fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> {
  49         ty::util::fold_list(self, folder, |tcx, v| tcx.intern_place_elems(v))
  50     }
  51 }
  52
  53 impl<'tcx, R: Idx, C: Idx> TypeFoldable<'tcx> for BitMatrix<R, C> {
  54     fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, _: &mut F) -> Result<Self, F::Error> {
  55         Ok(self)
  56     }
  57 }