| //! This module contains implements of the `Lift` and `TypeFoldable` |
| //! traits for various types in the Rust compiler. Most are written by |
| //! hand, though we've recently added some macros and proc-macros to help with the tedium. |
| |
| use crate::mir::interpret; |
| use crate::mir::ProjectionKind; |
| use crate::ty::fold::{TypeFoldable, TypeFolder, TypeVisitor}; |
| use crate::ty::print::{with_no_trimmed_paths, FmtPrinter, Printer}; |
| use crate::ty::{self, InferConst, Lift, Ty, TyCtxt}; |
| use rustc_data_structures::functor::IdFunctor; |
| use rustc_hir as hir; |
| use rustc_hir::def::Namespace; |
| use rustc_hir::def_id::CRATE_DEF_INDEX; |
| use rustc_index::vec::{Idx, IndexVec}; |
| |
| use std::fmt; |
| use std::ops::ControlFlow; |
| use std::rc::Rc; |
| use std::sync::Arc; |
| |
| impl fmt::Debug for ty::TraitDef { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| ty::tls::with(|tcx| { |
| with_no_trimmed_paths(|| { |
| FmtPrinter::new(tcx, f, Namespace::TypeNS).print_def_path(self.def_id, &[]) |
| })?; |
| Ok(()) |
| }) |
| } |
| } |
| |
| impl fmt::Debug for ty::AdtDef { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| ty::tls::with(|tcx| { |
| with_no_trimmed_paths(|| { |
| FmtPrinter::new(tcx, f, Namespace::TypeNS).print_def_path(self.did, &[]) |
| })?; |
| Ok(()) |
| }) |
| } |
| } |
| |
| impl fmt::Debug for ty::UpvarId { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| let name = ty::tls::with(|tcx| tcx.hir().name(self.var_path.hir_id)); |
| write!(f, "UpvarId({:?};`{}`;{:?})", self.var_path.hir_id, name, self.closure_expr_id) |
| } |
| } |
| |
| impl fmt::Debug for ty::UpvarBorrow<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "UpvarBorrow({:?}, {:?})", self.kind, self.region) |
| } |
| } |
| |
| impl fmt::Debug for ty::ExistentialTraitRef<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| with_no_trimmed_paths(|| fmt::Display::fmt(self, f)) |
| } |
| } |
| |
| impl fmt::Debug for ty::adjustment::Adjustment<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "{:?} -> {}", self.kind, self.target) |
| } |
| } |
| |
| impl fmt::Debug for ty::BoundRegionKind { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| match *self { |
| ty::BrAnon(n) => write!(f, "BrAnon({:?})", n), |
| ty::BrNamed(did, name) => { |
| if did.index == CRATE_DEF_INDEX { |
| write!(f, "BrNamed({})", name) |
| } else { |
| write!(f, "BrNamed({:?}, {})", did, name) |
| } |
| } |
| ty::BrEnv => write!(f, "BrEnv"), |
| } |
| } |
| } |
| |
| impl fmt::Debug for ty::RegionKind { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| match *self { |
| ty::ReEarlyBound(ref data) => write!(f, "ReEarlyBound({}, {})", data.index, data.name), |
| |
| ty::ReLateBound(binder_id, ref bound_region) => { |
| write!(f, "ReLateBound({:?}, {:?})", binder_id, bound_region) |
| } |
| |
| ty::ReFree(ref fr) => fr.fmt(f), |
| |
| ty::ReStatic => write!(f, "ReStatic"), |
| |
| ty::ReVar(ref vid) => vid.fmt(f), |
| |
| ty::RePlaceholder(placeholder) => write!(f, "RePlaceholder({:?})", placeholder), |
| |
| ty::ReEmpty(ui) => write!(f, "ReEmpty({:?})", ui), |
| |
| ty::ReErased => write!(f, "ReErased"), |
| } |
| } |
| } |
| |
| impl fmt::Debug for ty::FreeRegion { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "ReFree({:?}, {:?})", self.scope, self.bound_region) |
| } |
| } |
| |
| impl fmt::Debug for ty::FnSig<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "({:?}; c_variadic: {})->{:?}", self.inputs(), self.c_variadic, self.output()) |
| } |
| } |
| |
| impl<'tcx> fmt::Debug for ty::ConstVid<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "_#{}c", self.index) |
| } |
| } |
| |
| impl fmt::Debug for ty::RegionVid { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "'_#{}r", self.index()) |
| } |
| } |
| |
| impl fmt::Debug for ty::TraitRef<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| with_no_trimmed_paths(|| fmt::Display::fmt(self, f)) |
| } |
| } |
| |
| impl fmt::Debug for Ty<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| with_no_trimmed_paths(|| fmt::Display::fmt(self, f)) |
| } |
| } |
| |
| impl fmt::Debug for ty::ParamTy { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "{}/#{}", self.name, self.index) |
| } |
| } |
| |
| impl fmt::Debug for ty::ParamConst { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "{}/#{}", self.name, self.index) |
| } |
| } |
| |
| impl fmt::Debug for ty::TraitPredicate<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "TraitPredicate({:?})", self.trait_ref) |
| } |
| } |
| |
| impl fmt::Debug for ty::ProjectionPredicate<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "ProjectionPredicate({:?}, {:?})", self.projection_ty, self.ty) |
| } |
| } |
| |
| impl fmt::Debug for ty::Predicate<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "{:?}", self.kind()) |
| } |
| } |
| |
| impl fmt::Debug for ty::PredicateKind<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| match *self { |
| ty::PredicateKind::Trait(ref a, constness) => { |
| if let hir::Constness::Const = constness { |
| write!(f, "const ")?; |
| } |
| a.fmt(f) |
| } |
| ty::PredicateKind::Subtype(ref pair) => pair.fmt(f), |
| ty::PredicateKind::RegionOutlives(ref pair) => pair.fmt(f), |
| ty::PredicateKind::TypeOutlives(ref pair) => pair.fmt(f), |
| ty::PredicateKind::Projection(ref pair) => pair.fmt(f), |
| ty::PredicateKind::WellFormed(data) => write!(f, "WellFormed({:?})", data), |
| ty::PredicateKind::ObjectSafe(trait_def_id) => { |
| write!(f, "ObjectSafe({:?})", trait_def_id) |
| } |
| ty::PredicateKind::ClosureKind(closure_def_id, closure_substs, kind) => { |
| write!(f, "ClosureKind({:?}, {:?}, {:?})", closure_def_id, closure_substs, kind) |
| } |
| ty::PredicateKind::ConstEvaluatable(def_id, substs) => { |
| write!(f, "ConstEvaluatable({:?}, {:?})", def_id, substs) |
| } |
| ty::PredicateKind::ConstEquate(c1, c2) => write!(f, "ConstEquate({:?}, {:?})", c1, c2), |
| ty::PredicateKind::TypeWellFormedFromEnv(ty) => { |
| write!(f, "TypeWellFormedFromEnv({:?})", ty) |
| } |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Atomic structs |
| // |
| // For things that don't carry any arena-allocated data (and are |
| // copy...), just add them to this list. |
| |
| TrivialTypeFoldableAndLiftImpls! { |
| (), |
| bool, |
| usize, |
| ::rustc_target::abi::VariantIdx, |
| u32, |
| u64, |
| String, |
| crate::middle::region::Scope, |
| crate::ty::FloatTy, |
| ::rustc_ast::InlineAsmOptions, |
| ::rustc_ast::InlineAsmTemplatePiece, |
| ::rustc_ast::NodeId, |
| ::rustc_span::symbol::Symbol, |
| ::rustc_hir::def::Res, |
| ::rustc_hir::def_id::DefId, |
| ::rustc_hir::def_id::LocalDefId, |
| ::rustc_hir::HirId, |
| ::rustc_hir::LlvmInlineAsmInner, |
| ::rustc_hir::MatchSource, |
| ::rustc_hir::Mutability, |
| ::rustc_hir::Unsafety, |
| ::rustc_target::asm::InlineAsmRegOrRegClass, |
| ::rustc_target::spec::abi::Abi, |
| crate::mir::coverage::ExpressionOperandId, |
| crate::mir::coverage::CounterValueReference, |
| crate::mir::coverage::InjectedExpressionId, |
| crate::mir::coverage::InjectedExpressionIndex, |
| crate::mir::coverage::MappedExpressionIndex, |
| crate::mir::Local, |
| crate::mir::Promoted, |
| crate::traits::Reveal, |
| crate::ty::adjustment::AutoBorrowMutability, |
| crate::ty::AdtKind, |
| // Including `BoundRegionKind` is a *bit* dubious, but direct |
| // references to bound region appear in `ty::Error`, and aren't |
| // really meant to be folded. In general, we can only fold a fully |
| // general `Region`. |
| crate::ty::BoundRegionKind, |
| crate::ty::AssocItem, |
| crate::ty::Placeholder<crate::ty::BoundRegionKind>, |
| crate::ty::ClosureKind, |
| crate::ty::FreeRegion, |
| crate::ty::InferTy, |
| crate::ty::IntVarValue, |
| crate::ty::ParamConst, |
| crate::ty::ParamTy, |
| crate::ty::adjustment::PointerCast, |
| crate::ty::RegionVid, |
| crate::ty::UniverseIndex, |
| crate::ty::Variance, |
| ::rustc_span::Span, |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Lift implementations |
| |
| // FIXME(eddyb) replace all the uses of `Option::map` with `?`. |
| impl<'tcx, A: Lift<'tcx>, B: Lift<'tcx>> Lift<'tcx> for (A, B) { |
| type Lifted = (A::Lifted, B::Lifted); |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| Some((tcx.lift(self.0)?, tcx.lift(self.1)?)) |
| } |
| } |
| |
| impl<'tcx, A: Lift<'tcx>, B: Lift<'tcx>, C: Lift<'tcx>> Lift<'tcx> for (A, B, C) { |
| type Lifted = (A::Lifted, B::Lifted, C::Lifted); |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| Some((tcx.lift(self.0)?, tcx.lift(self.1)?, tcx.lift(self.2)?)) |
| } |
| } |
| |
| impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for Option<T> { |
| type Lifted = Option<T::Lifted>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| match self { |
| Some(x) => tcx.lift(x).map(Some), |
| None => Some(None), |
| } |
| } |
| } |
| |
| impl<'tcx, T: Lift<'tcx>, E: Lift<'tcx>> Lift<'tcx> for Result<T, E> { |
| type Lifted = Result<T::Lifted, E::Lifted>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| match self { |
| Ok(x) => tcx.lift(x).map(Ok), |
| Err(e) => tcx.lift(e).map(Err), |
| } |
| } |
| } |
| |
| impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for Box<T> { |
| type Lifted = Box<T::Lifted>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift(*self).map(Box::new) |
| } |
| } |
| |
| impl<'tcx, T: Lift<'tcx> + Clone> Lift<'tcx> for Rc<T> { |
| type Lifted = Rc<T::Lifted>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift(self.as_ref().clone()).map(Rc::new) |
| } |
| } |
| |
| impl<'tcx, T: Lift<'tcx> + Clone> Lift<'tcx> for Arc<T> { |
| type Lifted = Arc<T::Lifted>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift(self.as_ref().clone()).map(Arc::new) |
| } |
| } |
| impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for Vec<T> { |
| type Lifted = Vec<T::Lifted>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| self.into_iter().map(|v| tcx.lift(v)).collect() |
| } |
| } |
| |
| impl<'tcx, I: Idx, T: Lift<'tcx>> Lift<'tcx> for IndexVec<I, T> { |
| type Lifted = IndexVec<I, T::Lifted>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| self.into_iter().map(|e| tcx.lift(e)).collect() |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::TraitRef<'a> { |
| type Lifted = ty::TraitRef<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift(self.substs).map(|substs| ty::TraitRef { def_id: self.def_id, substs }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::ExistentialTraitRef<'a> { |
| type Lifted = ty::ExistentialTraitRef<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift(self.substs).map(|substs| ty::ExistentialTraitRef { def_id: self.def_id, substs }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::ExistentialPredicate<'a> { |
| type Lifted = ty::ExistentialPredicate<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| match self { |
| ty::ExistentialPredicate::Trait(x) => tcx.lift(x).map(ty::ExistentialPredicate::Trait), |
| ty::ExistentialPredicate::Projection(x) => { |
| tcx.lift(x).map(ty::ExistentialPredicate::Projection) |
| } |
| ty::ExistentialPredicate::AutoTrait(def_id) => { |
| Some(ty::ExistentialPredicate::AutoTrait(def_id)) |
| } |
| } |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::TraitPredicate<'a> { |
| type Lifted = ty::TraitPredicate<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<ty::TraitPredicate<'tcx>> { |
| tcx.lift(self.trait_ref).map(|trait_ref| ty::TraitPredicate { trait_ref }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::SubtypePredicate<'a> { |
| type Lifted = ty::SubtypePredicate<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<ty::SubtypePredicate<'tcx>> { |
| tcx.lift((self.a, self.b)).map(|(a, b)| ty::SubtypePredicate { |
| a_is_expected: self.a_is_expected, |
| a, |
| b, |
| }) |
| } |
| } |
| |
| impl<'tcx, A: Copy + Lift<'tcx>, B: Copy + Lift<'tcx>> Lift<'tcx> for ty::OutlivesPredicate<A, B> { |
| type Lifted = ty::OutlivesPredicate<A::Lifted, B::Lifted>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift((self.0, self.1)).map(|(a, b)| ty::OutlivesPredicate(a, b)) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::ProjectionTy<'a> { |
| type Lifted = ty::ProjectionTy<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<ty::ProjectionTy<'tcx>> { |
| tcx.lift(self.substs) |
| .map(|substs| ty::ProjectionTy { item_def_id: self.item_def_id, substs }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::ProjectionPredicate<'a> { |
| type Lifted = ty::ProjectionPredicate<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<ty::ProjectionPredicate<'tcx>> { |
| tcx.lift((self.projection_ty, self.ty)) |
| .map(|(projection_ty, ty)| ty::ProjectionPredicate { projection_ty, ty }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::ExistentialProjection<'a> { |
| type Lifted = ty::ExistentialProjection<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift(self.substs).map(|substs| ty::ExistentialProjection { |
| substs, |
| ty: tcx.lift(self.ty).expect("type must lift when substs do"), |
| item_def_id: self.item_def_id, |
| }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::PredicateKind<'a> { |
| type Lifted = ty::PredicateKind<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| match self { |
| ty::PredicateKind::Trait(data, constness) => { |
| tcx.lift(data).map(|data| ty::PredicateKind::Trait(data, constness)) |
| } |
| ty::PredicateKind::Subtype(data) => tcx.lift(data).map(ty::PredicateKind::Subtype), |
| ty::PredicateKind::RegionOutlives(data) => { |
| tcx.lift(data).map(ty::PredicateKind::RegionOutlives) |
| } |
| ty::PredicateKind::TypeOutlives(data) => { |
| tcx.lift(data).map(ty::PredicateKind::TypeOutlives) |
| } |
| ty::PredicateKind::Projection(data) => { |
| tcx.lift(data).map(ty::PredicateKind::Projection) |
| } |
| ty::PredicateKind::WellFormed(ty) => tcx.lift(ty).map(ty::PredicateKind::WellFormed), |
| ty::PredicateKind::ClosureKind(closure_def_id, closure_substs, kind) => { |
| tcx.lift(closure_substs).map(|closure_substs| { |
| ty::PredicateKind::ClosureKind(closure_def_id, closure_substs, kind) |
| }) |
| } |
| ty::PredicateKind::ObjectSafe(trait_def_id) => { |
| Some(ty::PredicateKind::ObjectSafe(trait_def_id)) |
| } |
| ty::PredicateKind::ConstEvaluatable(def_id, substs) => { |
| tcx.lift(substs).map(|substs| ty::PredicateKind::ConstEvaluatable(def_id, substs)) |
| } |
| ty::PredicateKind::ConstEquate(c1, c2) => { |
| tcx.lift((c1, c2)).map(|(c1, c2)| ty::PredicateKind::ConstEquate(c1, c2)) |
| } |
| ty::PredicateKind::TypeWellFormedFromEnv(ty) => { |
| tcx.lift(ty).map(ty::PredicateKind::TypeWellFormedFromEnv) |
| } |
| } |
| } |
| } |
| |
| impl<'a, 'tcx, T: Lift<'tcx>> Lift<'tcx> for ty::Binder<'a, T> |
| where |
| <T as Lift<'tcx>>::Lifted: TypeFoldable<'tcx>, |
| { |
| type Lifted = ty::Binder<'tcx, T::Lifted>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| let bound_vars = tcx.lift(self.bound_vars()); |
| tcx.lift(self.skip_binder()) |
| .zip(bound_vars) |
| .map(|(value, vars)| ty::Binder::bind_with_vars(value, vars)) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::ParamEnv<'a> { |
| type Lifted = ty::ParamEnv<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift(self.caller_bounds()) |
| .map(|caller_bounds| ty::ParamEnv::new(caller_bounds, self.reveal())) |
| } |
| } |
| |
| impl<'a, 'tcx, T: Lift<'tcx>> Lift<'tcx> for ty::ParamEnvAnd<'a, T> { |
| type Lifted = ty::ParamEnvAnd<'tcx, T::Lifted>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift(self.param_env).and_then(|param_env| { |
| tcx.lift(self.value).map(|value| ty::ParamEnvAnd { param_env, value }) |
| }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::ClosureSubsts<'a> { |
| type Lifted = ty::ClosureSubsts<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift(self.substs).map(|substs| ty::ClosureSubsts { substs }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::GeneratorSubsts<'a> { |
| type Lifted = ty::GeneratorSubsts<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift(self.substs).map(|substs| ty::GeneratorSubsts { substs }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::adjustment::Adjustment<'a> { |
| type Lifted = ty::adjustment::Adjustment<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| let ty::adjustment::Adjustment { kind, target } = self; |
| tcx.lift(kind).and_then(|kind| { |
| tcx.lift(target).map(|target| ty::adjustment::Adjustment { kind, target }) |
| }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::adjustment::Adjust<'a> { |
| type Lifted = ty::adjustment::Adjust<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| match self { |
| ty::adjustment::Adjust::NeverToAny => Some(ty::adjustment::Adjust::NeverToAny), |
| ty::adjustment::Adjust::Pointer(ptr) => Some(ty::adjustment::Adjust::Pointer(ptr)), |
| ty::adjustment::Adjust::Deref(overloaded) => { |
| tcx.lift(overloaded).map(ty::adjustment::Adjust::Deref) |
| } |
| ty::adjustment::Adjust::Borrow(autoref) => { |
| tcx.lift(autoref).map(ty::adjustment::Adjust::Borrow) |
| } |
| } |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::adjustment::OverloadedDeref<'a> { |
| type Lifted = ty::adjustment::OverloadedDeref<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift(self.region).map(|region| ty::adjustment::OverloadedDeref { |
| region, |
| mutbl: self.mutbl, |
| span: self.span, |
| }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::adjustment::AutoBorrow<'a> { |
| type Lifted = ty::adjustment::AutoBorrow<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| match self { |
| ty::adjustment::AutoBorrow::Ref(r, m) => { |
| tcx.lift(r).map(|r| ty::adjustment::AutoBorrow::Ref(r, m)) |
| } |
| ty::adjustment::AutoBorrow::RawPtr(m) => Some(ty::adjustment::AutoBorrow::RawPtr(m)), |
| } |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::GenSig<'a> { |
| type Lifted = ty::GenSig<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift((self.resume_ty, self.yield_ty, self.return_ty)) |
| .map(|(resume_ty, yield_ty, return_ty)| ty::GenSig { resume_ty, yield_ty, return_ty }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::FnSig<'a> { |
| type Lifted = ty::FnSig<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| tcx.lift(self.inputs_and_output).map(|x| ty::FnSig { |
| inputs_and_output: x, |
| c_variadic: self.c_variadic, |
| unsafety: self.unsafety, |
| abi: self.abi, |
| }) |
| } |
| } |
| |
| impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for ty::error::ExpectedFound<T> { |
| type Lifted = ty::error::ExpectedFound<T::Lifted>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| let ty::error::ExpectedFound { expected, found } = self; |
| tcx.lift(expected).and_then(|expected| { |
| tcx.lift(found).map(|found| ty::error::ExpectedFound { expected, found }) |
| }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::error::TypeError<'a> { |
| type Lifted = ty::error::TypeError<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| use crate::ty::error::TypeError::*; |
| |
| Some(match self { |
| Mismatch => Mismatch, |
| UnsafetyMismatch(x) => UnsafetyMismatch(x), |
| AbiMismatch(x) => AbiMismatch(x), |
| Mutability => Mutability, |
| ArgumentMutability(i) => ArgumentMutability(i), |
| TupleSize(x) => TupleSize(x), |
| FixedArraySize(x) => FixedArraySize(x), |
| ArgCount => ArgCount, |
| RegionsDoesNotOutlive(a, b) => { |
| return tcx.lift((a, b)).map(|(a, b)| RegionsDoesNotOutlive(a, b)); |
| } |
| RegionsInsufficientlyPolymorphic(a, b) => { |
| return tcx.lift(b).map(|b| RegionsInsufficientlyPolymorphic(a, b)); |
| } |
| RegionsOverlyPolymorphic(a, b) => { |
| return tcx.lift(b).map(|b| RegionsOverlyPolymorphic(a, b)); |
| } |
| RegionsPlaceholderMismatch => RegionsPlaceholderMismatch, |
| IntMismatch(x) => IntMismatch(x), |
| FloatMismatch(x) => FloatMismatch(x), |
| Traits(x) => Traits(x), |
| VariadicMismatch(x) => VariadicMismatch(x), |
| CyclicTy(t) => return tcx.lift(t).map(|t| CyclicTy(t)), |
| CyclicConst(ct) => return tcx.lift(ct).map(|ct| CyclicConst(ct)), |
| ProjectionMismatched(x) => ProjectionMismatched(x), |
| ArgumentSorts(x, i) => return tcx.lift(x).map(|x| ArgumentSorts(x, i)), |
| Sorts(x) => return tcx.lift(x).map(Sorts), |
| ExistentialMismatch(x) => return tcx.lift(x).map(ExistentialMismatch), |
| ConstMismatch(x) => return tcx.lift(x).map(ConstMismatch), |
| IntrinsicCast => IntrinsicCast, |
| TargetFeatureCast(x) => TargetFeatureCast(x), |
| ObjectUnsafeCoercion(x) => return tcx.lift(x).map(ObjectUnsafeCoercion), |
| }) |
| } |
| } |
| |
| impl<'a, 'tcx> Lift<'tcx> for ty::InstanceDef<'a> { |
| type Lifted = ty::InstanceDef<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| match self { |
| ty::InstanceDef::Item(def_id) => Some(ty::InstanceDef::Item(def_id)), |
| ty::InstanceDef::VtableShim(def_id) => Some(ty::InstanceDef::VtableShim(def_id)), |
| ty::InstanceDef::ReifyShim(def_id) => Some(ty::InstanceDef::ReifyShim(def_id)), |
| ty::InstanceDef::Intrinsic(def_id) => Some(ty::InstanceDef::Intrinsic(def_id)), |
| ty::InstanceDef::FnPtrShim(def_id, ty) => { |
| Some(ty::InstanceDef::FnPtrShim(def_id, tcx.lift(ty)?)) |
| } |
| ty::InstanceDef::Virtual(def_id, n) => Some(ty::InstanceDef::Virtual(def_id, n)), |
| ty::InstanceDef::ClosureOnceShim { call_once } => { |
| Some(ty::InstanceDef::ClosureOnceShim { call_once }) |
| } |
| ty::InstanceDef::DropGlue(def_id, ty) => { |
| Some(ty::InstanceDef::DropGlue(def_id, tcx.lift(ty)?)) |
| } |
| ty::InstanceDef::CloneShim(def_id, ty) => { |
| Some(ty::InstanceDef::CloneShim(def_id, tcx.lift(ty)?)) |
| } |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // TypeFoldable implementations. |
| // |
| // Ideally, each type should invoke `folder.fold_foo(self)` and |
| // nothing else. In some cases, though, we haven't gotten around to |
| // adding methods on the `folder` yet, and thus the folding is |
| // hard-coded here. This is less-flexible, because folders cannot |
| // override the behavior, but there are a lot of random types and one |
| // can easily refactor the folding into the TypeFolder trait as |
| // needed. |
| |
| /// AdtDefs are basically the same as a DefId. |
| impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::AdtDef { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, _folder: &mut F) -> Self { |
| self |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, _visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| ControlFlow::CONTINUE |
| } |
| } |
| |
| impl<'tcx, T: TypeFoldable<'tcx>, U: TypeFoldable<'tcx>> TypeFoldable<'tcx> for (T, U) { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> (T, U) { |
| (self.0.fold_with(folder), self.1.fold_with(folder)) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.0.visit_with(visitor)?; |
| self.1.visit_with(visitor) |
| } |
| } |
| |
| impl<'tcx, A: TypeFoldable<'tcx>, B: TypeFoldable<'tcx>, C: TypeFoldable<'tcx>> TypeFoldable<'tcx> |
| for (A, B, C) |
| { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> (A, B, C) { |
| (self.0.fold_with(folder), self.1.fold_with(folder), self.2.fold_with(folder)) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.0.visit_with(visitor)?; |
| self.1.visit_with(visitor)?; |
| self.2.visit_with(visitor) |
| } |
| } |
| |
| EnumTypeFoldableImpl! { |
| impl<'tcx, T> TypeFoldable<'tcx> for Option<T> { |
| (Some)(a), |
| (None), |
| } where T: TypeFoldable<'tcx> |
| } |
| |
| EnumTypeFoldableImpl! { |
| impl<'tcx, T, E> TypeFoldable<'tcx> for Result<T, E> { |
| (Ok)(a), |
| (Err)(a), |
| } where T: TypeFoldable<'tcx>, E: TypeFoldable<'tcx>, |
| } |
| |
| impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Rc<T> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| // FIXME: Reuse the `Rc` here. |
| Rc::new((*self).clone().fold_with(folder)) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| (**self).visit_with(visitor) |
| } |
| } |
| |
| impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Arc<T> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| // FIXME: Reuse the `Arc` here. |
| Arc::new((*self).clone().fold_with(folder)) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| (**self).visit_with(visitor) |
| } |
| } |
| |
| impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Box<T> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| self.map_id(|value| value.fold_with(folder)) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| (**self).visit_with(visitor) |
| } |
| } |
| |
| impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Vec<T> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| self.map_id(|t| t.fold_with(folder)) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.iter().try_for_each(|t| t.visit_with(visitor)) |
| } |
| } |
| |
| impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Box<[T]> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| self.map_id(|t| t.fold_with(folder)) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.iter().try_for_each(|t| t.visit_with(visitor)) |
| } |
| } |
| |
| impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for ty::Binder<'tcx, T> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| self.map_bound(|ty| ty.fold_with(folder)) |
| } |
| |
| fn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| folder.fold_binder(self) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.as_ref().skip_binder().visit_with(visitor) |
| } |
| |
| fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| visitor.visit_binder(self) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<ty::Binder<'tcx, ty::ExistentialPredicate<'tcx>>> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| ty::util::fold_list(self, folder, |tcx, v| tcx.intern_poly_existential_predicates(v)) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.iter().try_for_each(|p| p.visit_with(visitor)) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<Ty<'tcx>> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| ty::util::fold_list(self, folder, |tcx, v| tcx.intern_type_list(v)) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.iter().try_for_each(|t| t.visit_with(visitor)) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<ProjectionKind> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| ty::util::fold_list(self, folder, |tcx, v| tcx.intern_projs(v)) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.iter().try_for_each(|t| t.visit_with(visitor)) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for ty::instance::Instance<'tcx> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| use crate::ty::InstanceDef::*; |
| Self { |
| substs: self.substs.fold_with(folder), |
| def: match self.def { |
| Item(def) => Item(def.fold_with(folder)), |
| VtableShim(did) => VtableShim(did.fold_with(folder)), |
| ReifyShim(did) => ReifyShim(did.fold_with(folder)), |
| Intrinsic(did) => Intrinsic(did.fold_with(folder)), |
| FnPtrShim(did, ty) => FnPtrShim(did.fold_with(folder), ty.fold_with(folder)), |
| Virtual(did, i) => Virtual(did.fold_with(folder), i), |
| ClosureOnceShim { call_once } => { |
| ClosureOnceShim { call_once: call_once.fold_with(folder) } |
| } |
| DropGlue(did, ty) => DropGlue(did.fold_with(folder), ty.fold_with(folder)), |
| CloneShim(did, ty) => CloneShim(did.fold_with(folder), ty.fold_with(folder)), |
| }, |
| } |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| use crate::ty::InstanceDef::*; |
| self.substs.visit_with(visitor)?; |
| match self.def { |
| Item(def) => def.visit_with(visitor), |
| VtableShim(did) | ReifyShim(did) | Intrinsic(did) | Virtual(did, _) => { |
| did.visit_with(visitor) |
| } |
| FnPtrShim(did, ty) | CloneShim(did, ty) => { |
| did.visit_with(visitor)?; |
| ty.visit_with(visitor) |
| } |
| DropGlue(did, ty) => { |
| did.visit_with(visitor)?; |
| ty.visit_with(visitor) |
| } |
| ClosureOnceShim { call_once } => call_once.visit_with(visitor), |
| } |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for interpret::GlobalId<'tcx> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| Self { instance: self.instance.fold_with(folder), promoted: self.promoted } |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.instance.visit_with(visitor) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for Ty<'tcx> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| let kind = match *self.kind() { |
| ty::RawPtr(tm) => ty::RawPtr(tm.fold_with(folder)), |
| ty::Array(typ, sz) => ty::Array(typ.fold_with(folder), sz.fold_with(folder)), |
| ty::Slice(typ) => ty::Slice(typ.fold_with(folder)), |
| ty::Adt(tid, substs) => ty::Adt(tid, substs.fold_with(folder)), |
| ty::Dynamic(trait_ty, region) => { |
| ty::Dynamic(trait_ty.fold_with(folder), region.fold_with(folder)) |
| } |
| ty::Tuple(ts) => ty::Tuple(ts.fold_with(folder)), |
| ty::FnDef(def_id, substs) => ty::FnDef(def_id, substs.fold_with(folder)), |
| ty::FnPtr(f) => ty::FnPtr(f.fold_with(folder)), |
| ty::Ref(r, ty, mutbl) => ty::Ref(r.fold_with(folder), ty.fold_with(folder), mutbl), |
| ty::Generator(did, substs, movability) => { |
| ty::Generator(did, substs.fold_with(folder), movability) |
| } |
| ty::GeneratorWitness(types) => ty::GeneratorWitness(types.fold_with(folder)), |
| ty::Closure(did, substs) => ty::Closure(did, substs.fold_with(folder)), |
| ty::Projection(data) => ty::Projection(data.fold_with(folder)), |
| ty::Opaque(did, substs) => ty::Opaque(did, substs.fold_with(folder)), |
| |
| ty::Bool |
| | ty::Char |
| | ty::Str |
| | ty::Int(_) |
| | ty::Uint(_) |
| | ty::Float(_) |
| | ty::Error(_) |
| | ty::Infer(_) |
| | ty::Param(..) |
| | ty::Bound(..) |
| | ty::Placeholder(..) |
| | ty::Never |
| | ty::Foreign(..) => return self, |
| }; |
| |
| if *self.kind() == kind { self } else { folder.tcx().mk_ty(kind) } |
| } |
| |
| fn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| folder.fold_ty(self) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| match self.kind() { |
| ty::RawPtr(ref tm) => tm.visit_with(visitor), |
| ty::Array(typ, sz) => { |
| typ.visit_with(visitor)?; |
| sz.visit_with(visitor) |
| } |
| ty::Slice(typ) => typ.visit_with(visitor), |
| ty::Adt(_, substs) => substs.visit_with(visitor), |
| ty::Dynamic(ref trait_ty, ref reg) => { |
| trait_ty.visit_with(visitor)?; |
| reg.visit_with(visitor) |
| } |
| ty::Tuple(ts) => ts.visit_with(visitor), |
| ty::FnDef(_, substs) => substs.visit_with(visitor), |
| ty::FnPtr(ref f) => f.visit_with(visitor), |
| ty::Ref(r, ty, _) => { |
| r.visit_with(visitor)?; |
| ty.visit_with(visitor) |
| } |
| ty::Generator(_did, ref substs, _) => substs.visit_with(visitor), |
| ty::GeneratorWitness(ref types) => types.visit_with(visitor), |
| ty::Closure(_did, ref substs) => substs.visit_with(visitor), |
| ty::Projection(ref data) => data.visit_with(visitor), |
| ty::Opaque(_, ref substs) => substs.visit_with(visitor), |
| |
| ty::Bool |
| | ty::Char |
| | ty::Str |
| | ty::Int(_) |
| | ty::Uint(_) |
| | ty::Float(_) |
| | ty::Error(_) |
| | ty::Infer(_) |
| | ty::Bound(..) |
| | ty::Placeholder(..) |
| | ty::Param(..) |
| | ty::Never |
| | ty::Foreign(..) => ControlFlow::CONTINUE, |
| } |
| } |
| |
| fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| visitor.visit_ty(self) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for ty::Region<'tcx> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, _folder: &mut F) -> Self { |
| self |
| } |
| |
| fn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| folder.fold_region(self) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, _visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| ControlFlow::CONTINUE |
| } |
| |
| fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| visitor.visit_region(*self) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for ty::Predicate<'tcx> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| let new = self.inner.kind.fold_with(folder); |
| folder.tcx().reuse_or_mk_predicate(self, new) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.inner.kind.visit_with(visitor) |
| } |
| |
| fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| visitor.visit_predicate(*self) |
| } |
| |
| fn has_vars_bound_at_or_above(&self, binder: ty::DebruijnIndex) -> bool { |
| self.inner.outer_exclusive_binder > binder |
| } |
| |
| fn has_type_flags(&self, flags: ty::TypeFlags) -> bool { |
| self.inner.flags.intersects(flags) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<ty::Predicate<'tcx>> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| ty::util::fold_list(self, folder, |tcx, v| tcx.intern_predicates(v)) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.iter().try_for_each(|p| p.visit_with(visitor)) |
| } |
| } |
| |
| impl<'tcx, T: TypeFoldable<'tcx>, I: Idx> TypeFoldable<'tcx> for IndexVec<I, T> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| self.map_id(|x| x.fold_with(folder)) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.iter().try_for_each(|t| t.visit_with(visitor)) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::Const<'tcx> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| let ty = self.ty.fold_with(folder); |
| let val = self.val.fold_with(folder); |
| if ty != self.ty || val != self.val { |
| folder.tcx().mk_const(ty::Const { ty, val }) |
| } else { |
| self |
| } |
| } |
| |
| fn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| folder.fold_const(self) |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.ty.visit_with(visitor)?; |
| self.val.visit_with(visitor) |
| } |
| |
| fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| visitor.visit_const(self) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for ty::ConstKind<'tcx> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self { |
| match self { |
| ty::ConstKind::Infer(ic) => ty::ConstKind::Infer(ic.fold_with(folder)), |
| ty::ConstKind::Param(p) => ty::ConstKind::Param(p.fold_with(folder)), |
| ty::ConstKind::Unevaluated(ty::Unevaluated { def, substs, promoted }) => { |
| ty::ConstKind::Unevaluated(ty::Unevaluated { |
| def, |
| substs: substs.fold_with(folder), |
| promoted, |
| }) |
| } |
| ty::ConstKind::Value(_) |
| | ty::ConstKind::Bound(..) |
| | ty::ConstKind::Placeholder(..) |
| | ty::ConstKind::Error(_) => self, |
| } |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| match *self { |
| ty::ConstKind::Infer(ic) => ic.visit_with(visitor), |
| ty::ConstKind::Param(p) => p.visit_with(visitor), |
| ty::ConstKind::Unevaluated(ct) => ct.substs.visit_with(visitor), |
| ty::ConstKind::Value(_) |
| | ty::ConstKind::Bound(..) |
| | ty::ConstKind::Placeholder(_) |
| | ty::ConstKind::Error(_) => ControlFlow::CONTINUE, |
| } |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for InferConst<'tcx> { |
| fn super_fold_with<F: TypeFolder<'tcx>>(self, _folder: &mut F) -> Self { |
| self |
| } |
| |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, _visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| ControlFlow::CONTINUE |
| } |
| } |
