| //! 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::{Field, ProjectionKind}; |
| use crate::ty::fold::{FallibleTypeFolder, TypeFoldable, TypeSuperFoldable}; |
| use crate::ty::print::{with_no_trimmed_paths, FmtPrinter, Printer}; |
| use crate::ty::visit::{TypeSuperVisitable, TypeVisitable, TypeVisitor}; |
| use crate::ty::{self, AliasTy, InferConst, Lift, Term, TermKind, Ty, TyCtxt}; |
| use rustc_data_structures::functor::IdFunctor; |
| use rustc_hir::def::Namespace; |
| use rustc_index::vec::{Idx, IndexVec}; |
| use rustc_target::abi::TyAndLayout; |
| |
| use std::fmt; |
| use std::mem::ManuallyDrop; |
| 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!({ |
| f.write_str( |
| &FmtPrinter::new(tcx, Namespace::TypeNS) |
| .print_def_path(self.def_id, &[])? |
| .into_buffer(), |
| ) |
| }) |
| }) |
| } |
| } |
| |
| impl<'tcx> fmt::Debug for ty::AdtDef<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| ty::tls::with(|tcx| { |
| with_no_trimmed_paths!({ |
| f.write_str( |
| &FmtPrinter::new(tcx, Namespace::TypeNS) |
| .print_def_path(self.did(), &[])? |
| .into_buffer(), |
| ) |
| }) |
| }) |
| } |
| } |
| |
| 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<'tcx> 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<'tcx> 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, span) => write!(f, "BrAnon({n:?}, {span:?})"), |
| ty::BrNamed(did, name) => { |
| if did.is_crate_root() { |
| write!(f, "BrNamed({})", name) |
| } else { |
| write!(f, "BrNamed({:?}, {})", did, name) |
| } |
| } |
| ty::BrEnv => write!(f, "BrEnv"), |
| } |
| } |
| } |
| |
| impl fmt::Debug for ty::FreeRegion { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "ReFree({:?}, {:?})", self.scope, self.bound_region) |
| } |
| } |
| |
| impl<'tcx> 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<'tcx> 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<'tcx> 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<'tcx> fmt::Debug for ty::TraitPredicate<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| if let ty::BoundConstness::ConstIfConst = self.constness { |
| write!(f, "~const ")?; |
| } |
| write!(f, "TraitPredicate({:?}, polarity:{:?})", self.trait_ref, self.polarity) |
| } |
| } |
| |
| impl<'tcx> fmt::Debug for ty::ProjectionPredicate<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "ProjectionPredicate({:?}, {:?})", self.projection_ty, self.term) |
| } |
| } |
| |
| impl<'tcx> fmt::Debug for ty::Predicate<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "{:?}", self.kind()) |
| } |
| } |
| |
| impl<'tcx> fmt::Debug for ty::Clause<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| match *self { |
| ty::Clause::Trait(ref a) => a.fmt(f), |
| ty::Clause::RegionOutlives(ref pair) => pair.fmt(f), |
| ty::Clause::TypeOutlives(ref pair) => pair.fmt(f), |
| ty::Clause::Projection(ref pair) => pair.fmt(f), |
| } |
| } |
| } |
| |
| impl<'tcx> fmt::Debug for ty::PredicateKind<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| match *self { |
| ty::PredicateKind::Clause(ref a) => a.fmt(f), |
| ty::PredicateKind::Subtype(ref pair) => pair.fmt(f), |
| ty::PredicateKind::Coerce(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(ct) => { |
| write!(f, "ConstEvaluatable({ct:?})") |
| } |
| ty::PredicateKind::ConstEquate(c1, c2) => write!(f, "ConstEquate({:?}, {:?})", c1, c2), |
| ty::PredicateKind::TypeWellFormedFromEnv(ty) => { |
| write!(f, "TypeWellFormedFromEnv({:?})", ty) |
| } |
| ty::PredicateKind::Ambiguous => write!(f, "Ambiguous"), |
| } |
| } |
| } |
| |
| impl<'tcx> fmt::Debug for AliasTy<'tcx> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| f.debug_struct("AliasTy") |
| .field("substs", &self.substs) |
| .field("def_id", &self.def_id) |
| .finish() |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Atomic structs |
| // |
| // For things that don't carry any arena-allocated data (and are |
| // copy...), just add them to this list. |
| |
| TrivialTypeTraversalAndLiftImpls! { |
| (), |
| bool, |
| usize, |
| ::rustc_target::abi::VariantIdx, |
| u16, |
| 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::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, |
| crate::ty::BoundConstness, |
| // 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::AssocKind, |
| crate::ty::AliasKind, |
| crate::ty::Placeholder<crate::ty::BoundRegionKind>, |
| crate::ty::Placeholder<crate::ty::BoundTyKind>, |
| 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, |
| ::rustc_errors::ErrorGuaranteed, |
| Field, |
| interpret::Scalar, |
| rustc_target::abi::Size, |
| rustc_type_ir::DebruijnIndex, |
| ty::BoundVar, |
| ty::Placeholder<ty::BoundVar>, |
| } |
| |
| TrivialTypeTraversalAndLiftImpls! { |
| for<'tcx> { |
| ty::ValTree<'tcx>, |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Lift implementations |
| |
| 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> { |
| Some(match self { |
| Some(x) => Some(tcx.lift(x)?), |
| None => 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> { |
| Some(Box::new(tcx.lift(*self)?)) |
| } |
| } |
| |
| 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> { |
| Some(Rc::new(tcx.lift(self.as_ref().clone())?)) |
| } |
| } |
| |
| 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> { |
| Some(Arc::new(tcx.lift(self.as_ref().clone())?)) |
| } |
| } |
| 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 Term<'a> { |
| type Lifted = ty::Term<'tcx>; |
| fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> { |
| Some( |
| match self.unpack() { |
| TermKind::Ty(ty) => TermKind::Ty(tcx.lift(ty)?), |
| TermKind::Const(c) => TermKind::Const(tcx.lift(c)?), |
| } |
| .pack(), |
| ) |
| } |
| } |
| 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(), self.constness())) |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // TypeFoldable implementations. |
| |
| /// AdtDefs are basically the same as a DefId. |
| impl<'tcx> TypeFoldable<'tcx> for ty::AdtDef<'tcx> { |
| fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, _folder: &mut F) -> Result<Self, F::Error> { |
| Ok(self) |
| } |
| } |
| |
| impl<'tcx> TypeVisitable<'tcx> for ty::AdtDef<'tcx> { |
| fn 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 try_fold_with<F: FallibleTypeFolder<'tcx>>( |
| self, |
| folder: &mut F, |
| ) -> Result<(T, U), F::Error> { |
| Ok((self.0.try_fold_with(folder)?, self.1.try_fold_with(folder)?)) |
| } |
| } |
| |
| impl<'tcx, T: TypeVisitable<'tcx>, U: TypeVisitable<'tcx>> TypeVisitable<'tcx> for (T, U) { |
| fn 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 try_fold_with<F: FallibleTypeFolder<'tcx>>( |
| self, |
| folder: &mut F, |
| ) -> Result<(A, B, C), F::Error> { |
| Ok(( |
| self.0.try_fold_with(folder)?, |
| self.1.try_fold_with(folder)?, |
| self.2.try_fold_with(folder)?, |
| )) |
| } |
| } |
| |
| impl<'tcx, A: TypeVisitable<'tcx>, B: TypeVisitable<'tcx>, C: TypeVisitable<'tcx>> |
| TypeVisitable<'tcx> for (A, B, C) |
| { |
| fn 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) |
| } |
| } |
| |
| EnumTypeTraversalImpl! { |
| impl<'tcx, T> TypeFoldable<'tcx> for Option<T> { |
| (Some)(a), |
| (None), |
| } where T: TypeFoldable<'tcx> |
| } |
| EnumTypeTraversalImpl! { |
| impl<'tcx, T> TypeVisitable<'tcx> for Option<T> { |
| (Some)(a), |
| (None), |
| } where T: TypeVisitable<'tcx> |
| } |
| |
| EnumTypeTraversalImpl! { |
| impl<'tcx, T, E> TypeFoldable<'tcx> for Result<T, E> { |
| (Ok)(a), |
| (Err)(a), |
| } where T: TypeFoldable<'tcx>, E: TypeFoldable<'tcx>, |
| } |
| EnumTypeTraversalImpl! { |
| impl<'tcx, T, E> TypeVisitable<'tcx> for Result<T, E> { |
| (Ok)(a), |
| (Err)(a), |
| } where T: TypeVisitable<'tcx>, E: TypeVisitable<'tcx>, |
| } |
| |
| impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Rc<T> { |
| fn try_fold_with<F: FallibleTypeFolder<'tcx>>( |
| mut self, |
| folder: &mut F, |
| ) -> Result<Self, F::Error> { |
| // We merely want to replace the contained `T`, if at all possible, |
| // so that we don't needlessly allocate a new `Rc` or indeed clone |
| // the contained type. |
| unsafe { |
| // First step is to ensure that we have a unique reference to |
| // the contained type, which `Rc::make_mut` will accomplish (by |
| // allocating a new `Rc` and cloning the `T` only if required). |
| // This is done *before* casting to `Rc<ManuallyDrop<T>>` so that |
| // panicking during `make_mut` does not leak the `T`. |
| Rc::make_mut(&mut self); |
| |
| // Casting to `Rc<ManuallyDrop<T>>` is safe because `ManuallyDrop` |
| // is `repr(transparent)`. |
| let ptr = Rc::into_raw(self).cast::<ManuallyDrop<T>>(); |
| let mut unique = Rc::from_raw(ptr); |
| |
| // Call to `Rc::make_mut` above guarantees that `unique` is the |
| // sole reference to the contained value, so we can avoid doing |
| // a checked `get_mut` here. |
| let slot = Rc::get_mut_unchecked(&mut unique); |
| |
| // Semantically move the contained type out from `unique`, fold |
| // it, then move the folded value back into `unique`. Should |
| // folding fail, `ManuallyDrop` ensures that the "moved-out" |
| // value is not re-dropped. |
| let owned = ManuallyDrop::take(slot); |
| let folded = owned.try_fold_with(folder)?; |
| *slot = ManuallyDrop::new(folded); |
| |
| // Cast back to `Rc<T>`. |
| Ok(Rc::from_raw(Rc::into_raw(unique).cast())) |
| } |
| } |
| } |
| |
| impl<'tcx, T: TypeVisitable<'tcx>> TypeVisitable<'tcx> for Rc<T> { |
| fn 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 try_fold_with<F: FallibleTypeFolder<'tcx>>( |
| mut self, |
| folder: &mut F, |
| ) -> Result<Self, F::Error> { |
| // We merely want to replace the contained `T`, if at all possible, |
| // so that we don't needlessly allocate a new `Arc` or indeed clone |
| // the contained type. |
| unsafe { |
| // First step is to ensure that we have a unique reference to |
| // the contained type, which `Arc::make_mut` will accomplish (by |
| // allocating a new `Arc` and cloning the `T` only if required). |
| // This is done *before* casting to `Arc<ManuallyDrop<T>>` so that |
| // panicking during `make_mut` does not leak the `T`. |
| Arc::make_mut(&mut self); |
| |
| // Casting to `Arc<ManuallyDrop<T>>` is safe because `ManuallyDrop` |
| // is `repr(transparent)`. |
| let ptr = Arc::into_raw(self).cast::<ManuallyDrop<T>>(); |
| let mut unique = Arc::from_raw(ptr); |
| |
| // Call to `Arc::make_mut` above guarantees that `unique` is the |
| // sole reference to the contained value, so we can avoid doing |
| // a checked `get_mut` here. |
| let slot = Arc::get_mut_unchecked(&mut unique); |
| |
| // Semantically move the contained type out from `unique`, fold |
| // it, then move the folded value back into `unique`. Should |
| // folding fail, `ManuallyDrop` ensures that the "moved-out" |
| // value is not re-dropped. |
| let owned = ManuallyDrop::take(slot); |
| let folded = owned.try_fold_with(folder)?; |
| *slot = ManuallyDrop::new(folded); |
| |
| // Cast back to `Arc<T>`. |
| Ok(Arc::from_raw(Arc::into_raw(unique).cast())) |
| } |
| } |
| } |
| |
| impl<'tcx, T: TypeVisitable<'tcx>> TypeVisitable<'tcx> for Arc<T> { |
| fn 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 try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| self.try_map_id(|value| value.try_fold_with(folder)) |
| } |
| } |
| |
| impl<'tcx, T: TypeVisitable<'tcx>> TypeVisitable<'tcx> for Box<T> { |
| fn 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 try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| self.try_map_id(|t| t.try_fold_with(folder)) |
| } |
| } |
| |
| impl<'tcx, T: TypeVisitable<'tcx>> TypeVisitable<'tcx> for Vec<T> { |
| fn 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: TypeVisitable<'tcx>> TypeVisitable<'tcx> for &[T] { |
| fn 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 try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| self.try_map_id(|t| t.try_fold_with(folder)) |
| } |
| } |
| |
| impl<'tcx, T: TypeVisitable<'tcx>> TypeVisitable<'tcx> for Box<[T]> { |
| fn 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 try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| folder.try_fold_binder(self) |
| } |
| } |
| |
| impl<'tcx, T: TypeVisitable<'tcx>> TypeVisitable<'tcx> for ty::Binder<'tcx, T> { |
| fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| visitor.visit_binder(self) |
| } |
| } |
| |
| impl<'tcx, T: TypeFoldable<'tcx>> TypeSuperFoldable<'tcx> for ty::Binder<'tcx, T> { |
| fn try_super_fold_with<F: FallibleTypeFolder<'tcx>>( |
| self, |
| folder: &mut F, |
| ) -> Result<Self, F::Error> { |
| self.try_map_bound(|ty| ty.try_fold_with(folder)) |
| } |
| } |
| |
| impl<'tcx, T: TypeVisitable<'tcx>> TypeSuperVisitable<'tcx> for ty::Binder<'tcx, T> { |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.as_ref().skip_binder().visit_with(visitor) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<ty::PolyExistentialPredicate<'tcx>> { |
| fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| ty::util::fold_list(self, folder, |tcx, v| tcx.intern_poly_existential_predicates(v)) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<ty::Const<'tcx>> { |
| fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| ty::util::fold_list(self, folder, |tcx, v| tcx.mk_const_list(v.iter())) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<ProjectionKind> { |
| fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| ty::util::fold_list(self, folder, |tcx, v| tcx.intern_projs(v)) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for Ty<'tcx> { |
| fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| folder.try_fold_ty(self) |
| } |
| } |
| |
| impl<'tcx> TypeVisitable<'tcx> for Ty<'tcx> { |
| fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| visitor.visit_ty(*self) |
| } |
| } |
| |
| impl<'tcx> TypeSuperFoldable<'tcx> for Ty<'tcx> { |
| fn try_super_fold_with<F: FallibleTypeFolder<'tcx>>( |
| self, |
| folder: &mut F, |
| ) -> Result<Self, F::Error> { |
| let kind = match *self.kind() { |
| ty::RawPtr(tm) => ty::RawPtr(tm.try_fold_with(folder)?), |
| ty::Array(typ, sz) => ty::Array(typ.try_fold_with(folder)?, sz.try_fold_with(folder)?), |
| ty::Slice(typ) => ty::Slice(typ.try_fold_with(folder)?), |
| ty::Adt(tid, substs) => ty::Adt(tid, substs.try_fold_with(folder)?), |
| ty::Dynamic(trait_ty, region, representation) => ty::Dynamic( |
| trait_ty.try_fold_with(folder)?, |
| region.try_fold_with(folder)?, |
| representation, |
| ), |
| ty::Tuple(ts) => ty::Tuple(ts.try_fold_with(folder)?), |
| ty::FnDef(def_id, substs) => ty::FnDef(def_id, substs.try_fold_with(folder)?), |
| ty::FnPtr(f) => ty::FnPtr(f.try_fold_with(folder)?), |
| ty::Ref(r, ty, mutbl) => { |
| ty::Ref(r.try_fold_with(folder)?, ty.try_fold_with(folder)?, mutbl) |
| } |
| ty::Generator(did, substs, movability) => { |
| ty::Generator(did, substs.try_fold_with(folder)?, movability) |
| } |
| ty::GeneratorWitness(types) => ty::GeneratorWitness(types.try_fold_with(folder)?), |
| ty::GeneratorWitnessMIR(did, substs) => { |
| ty::GeneratorWitnessMIR(did, substs.try_fold_with(folder)?) |
| } |
| ty::Closure(did, substs) => ty::Closure(did, substs.try_fold_with(folder)?), |
| ty::Alias(kind, data) => ty::Alias(kind, data.try_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 Ok(self), |
| }; |
| |
| Ok(if *self.kind() == kind { self } else { folder.tcx().mk_ty(kind) }) |
| } |
| } |
| |
| impl<'tcx> TypeSuperVisitable<'tcx> for Ty<'tcx> { |
| 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::GeneratorWitnessMIR(_did, ref substs) => substs.visit_with(visitor), |
| ty::Closure(_did, ref substs) => substs.visit_with(visitor), |
| ty::Alias(_, ref data) => data.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(()), |
| } |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for ty::Region<'tcx> { |
| fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| folder.try_fold_region(self) |
| } |
| } |
| |
| impl<'tcx> TypeVisitable<'tcx> for ty::Region<'tcx> { |
| fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| visitor.visit_region(*self) |
| } |
| } |
| |
| impl<'tcx> TypeSuperFoldable<'tcx> for ty::Region<'tcx> { |
| fn try_super_fold_with<F: FallibleTypeFolder<'tcx>>( |
| self, |
| _folder: &mut F, |
| ) -> Result<Self, F::Error> { |
| Ok(self) |
| } |
| } |
| |
| impl<'tcx> TypeSuperVisitable<'tcx> for ty::Region<'tcx> { |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, _visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| ControlFlow::Continue(()) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for ty::Predicate<'tcx> { |
| fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| folder.try_fold_predicate(self) |
| } |
| } |
| |
| impl<'tcx> TypeVisitable<'tcx> for ty::Predicate<'tcx> { |
| fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| visitor.visit_predicate(*self) |
| } |
| |
| #[inline] |
| fn has_vars_bound_at_or_above(&self, binder: ty::DebruijnIndex) -> bool { |
| self.outer_exclusive_binder() > binder |
| } |
| |
| #[inline] |
| fn has_type_flags(&self, flags: ty::TypeFlags) -> bool { |
| self.flags().intersects(flags) |
| } |
| } |
| |
| impl<'tcx> TypeSuperFoldable<'tcx> for ty::Predicate<'tcx> { |
| fn try_super_fold_with<F: FallibleTypeFolder<'tcx>>( |
| self, |
| folder: &mut F, |
| ) -> Result<Self, F::Error> { |
| let new = self.kind().try_fold_with(folder)?; |
| Ok(folder.tcx().reuse_or_mk_predicate(self, new)) |
| } |
| } |
| |
| impl<'tcx> TypeSuperVisitable<'tcx> for ty::Predicate<'tcx> { |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.kind().visit_with(visitor) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<ty::Predicate<'tcx>> { |
| fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| ty::util::fold_list(self, folder, |tcx, v| tcx.intern_predicates(v)) |
| } |
| } |
| |
| impl<'tcx, T: TypeFoldable<'tcx>, I: Idx> TypeFoldable<'tcx> for IndexVec<I, T> { |
| fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| self.try_map_id(|x| x.try_fold_with(folder)) |
| } |
| } |
| |
| impl<'tcx, T: TypeVisitable<'tcx>, I: Idx> TypeVisitable<'tcx> for IndexVec<I, T> { |
| fn 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::Const<'tcx> { |
| fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, folder: &mut F) -> Result<Self, F::Error> { |
| folder.try_fold_const(self) |
| } |
| } |
| |
| impl<'tcx> TypeVisitable<'tcx> for ty::Const<'tcx> { |
| fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| visitor.visit_const(*self) |
| } |
| } |
| |
| impl<'tcx> TypeSuperFoldable<'tcx> for ty::Const<'tcx> { |
| fn try_super_fold_with<F: FallibleTypeFolder<'tcx>>( |
| self, |
| folder: &mut F, |
| ) -> Result<Self, F::Error> { |
| let ty = self.ty().try_fold_with(folder)?; |
| let kind = self.kind().try_fold_with(folder)?; |
| if ty != self.ty() || kind != self.kind() { |
| Ok(folder.tcx().mk_const(kind, ty)) |
| } else { |
| Ok(self) |
| } |
| } |
| } |
| |
| impl<'tcx> TypeSuperVisitable<'tcx> for ty::Const<'tcx> { |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.ty().visit_with(visitor)?; |
| self.kind().visit_with(visitor) |
| } |
| } |
| |
| impl<'tcx> TypeFoldable<'tcx> for InferConst<'tcx> { |
| fn try_fold_with<F: FallibleTypeFolder<'tcx>>(self, _folder: &mut F) -> Result<Self, F::Error> { |
| Ok(self) |
| } |
| } |
| |
| impl<'tcx> TypeVisitable<'tcx> for InferConst<'tcx> { |
| fn visit_with<V: TypeVisitor<'tcx>>(&self, _visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| ControlFlow::Continue(()) |
| } |
| } |
| |
| impl<'tcx> TypeSuperVisitable<'tcx> for ty::UnevaluatedConst<'tcx> { |
| fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| self.substs.visit_with(visitor) |
| } |
| } |
| |
| impl<'tcx> TypeVisitable<'tcx> for TyAndLayout<'tcx, Ty<'tcx>> { |
| fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> { |
| visitor.visit_ty(self.ty) |
| } |
| } |
