}
}
-///////////////////////////////////////////////////////////////////////////
-// Lift implementations
+impl<'tcx> fmt::Display for traits::WhereClause<'tcx> {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ use traits::WhereClause::*;
-impl<'a, 'tcx> Lift<'tcx> for traits::SelectionError<'a> {
- type Lifted = traits::SelectionError<'tcx>;
- fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
- match *self {
- super::Unimplemented => Some(super::Unimplemented),
- super::OutputTypeParameterMismatch(a, b, ref err) => {
- tcx.lift(&(a, b)).and_then(|(a, b)|
- tcx.lift(err)
- .map(|err| super::OutputTypeParameterMismatch(a, b, err))
- )
+ // Bypass ppaux because it does not print out anonymous regions.
+ fn write_region_name<'tcx>(
+ r: ty::Region<'tcx>,
+ fmt: &mut fmt::Formatter<'_>
+ ) -> fmt::Result {
+ match r {
+ ty::ReLateBound(index, br) => match br {
+ ty::BoundRegion::BrNamed(_, name) => write!(fmt, "{}", name),
+ ty::BoundRegion::BrAnon(var) => {
+ if *index == ty::INNERMOST {
+ write!(fmt, "'^{}", var)
+ } else {
+ write!(fmt, "'^{}_{}", index.index(), var)
+ }
+ }
+ _ => write!(fmt, "'_"),
+ }
+
+ _ => write!(fmt, "{}", r),
}
- super::TraitNotObjectSafe(def_id) => Some(super::TraitNotObjectSafe(def_id)),
- super::ConstEvalFailure(err) => Some(super::ConstEvalFailure(err)),
- super::Overflow => Some(super::Overflow),
}
- }
-}
-impl<'a, 'tcx> Lift<'tcx> for traits::ObligationCauseCode<'a> {
- type Lifted = traits::ObligationCauseCode<'tcx>;
- fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
- match *self {
- super::ReturnNoExpression => Some(super::ReturnNoExpression),
- super::MiscObligation => Some(super::MiscObligation),
- super::SliceOrArrayElem => Some(super::SliceOrArrayElem),
- super::TupleElem => Some(super::TupleElem),
- super::ProjectionWf(proj) => tcx.lift(&proj).map(super::ProjectionWf),
- super::ItemObligation(def_id) => Some(super::ItemObligation(def_id)),
- super::ReferenceOutlivesReferent(ty) => {
- tcx.lift(&ty).map(super::ReferenceOutlivesReferent)
- }
- super::ObjectTypeBound(ty, r) => tcx.lift(&ty).and_then(|ty|
- tcx.lift(&r)
- .and_then(|r| Some(super::ObjectTypeBound(ty, r)))
- ),
- super::ObjectCastObligation(ty) => tcx.lift(&ty).map(super::ObjectCastObligation),
- super::AssignmentLhsSized => Some(super::AssignmentLhsSized),
- super::TupleInitializerSized => Some(super::TupleInitializerSized),
- super::StructInitializerSized => Some(super::StructInitializerSized),
- super::VariableType(id) => Some(super::VariableType(id)),
- super::ReturnType(id) => Some(super::ReturnType(id)),
- super::SizedArgumentType => Some(super::SizedArgumentType),
- super::SizedReturnType => Some(super::SizedReturnType),
- super::SizedYieldType => Some(super::SizedYieldType),
- super::RepeatVec => Some(super::RepeatVec),
- super::FieldSized { adt_kind, last } => Some(super::FieldSized { adt_kind, last }),
- super::ConstSized => Some(super::ConstSized),
- super::SharedStatic => Some(super::SharedStatic),
- super::BuiltinDerivedObligation(ref cause) => {
- tcx.lift(cause).map(super::BuiltinDerivedObligation)
+ match self {
+ Implemented(trait_ref) => write!(fmt, "Implemented({})", trait_ref),
+ ProjectionEq(projection) => write!(fmt, "ProjectionEq({})", projection),
+ RegionOutlives(predicate) => {
+ write!(fmt, "RegionOutlives({}: ", predicate.0)?;
+ write_region_name(predicate.1, fmt)?;
+ write!(fmt, ")")
}
- super::ImplDerivedObligation(ref cause) => {
- tcx.lift(cause).map(super::ImplDerivedObligation)
+ TypeOutlives(predicate) => {
+ write!(fmt, "TypeOutlives({}: ", predicate.0)?;
+ write_region_name(predicate.1, fmt)?;
+ write!(fmt, ")")
}
- super::CompareImplMethodObligation {
- item_name,
- impl_item_def_id,
- trait_item_def_id,
- } => Some(super::CompareImplMethodObligation {
- item_name,
- impl_item_def_id,
- trait_item_def_id,
- }),
- super::ExprAssignable => Some(super::ExprAssignable),
- super::MatchExpressionArm { arm_span, source } => Some(super::MatchExpressionArm {
- arm_span,
- source: source,
- }),
- super::IfExpression => Some(super::IfExpression),
- super::IfExpressionWithNoElse => Some(super::IfExpressionWithNoElse),
- super::MainFunctionType => Some(super::MainFunctionType),
- super::StartFunctionType => Some(super::StartFunctionType),
- super::IntrinsicType => Some(super::IntrinsicType),
- super::MethodReceiver => Some(super::MethodReceiver),
- super::BlockTailExpression(id) => Some(super::BlockTailExpression(id)),
- super::TrivialBound => Some(super::TrivialBound),
}
}
}
-impl<'a, 'tcx> Lift<'tcx> for traits::DerivedObligationCause<'a> {
- type Lifted = traits::DerivedObligationCause<'tcx>;
- fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
- tcx.lift(&self.parent_trait_ref).and_then(|trait_ref|
- tcx.lift(&*self.parent_code)
- .map(|code| traits::DerivedObligationCause {
- parent_trait_ref: trait_ref,
- parent_code: Rc::new(code),
- })
- )
+impl<'tcx> fmt::Display for traits::WellFormed<'tcx> {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ use traits::WellFormed::*;
+
+ match self {
+ Trait(trait_ref) => write!(fmt, "WellFormed({})", trait_ref),
+ Ty(ty) => write!(fmt, "WellFormed({})", ty),
+ }
}
}
-impl<'a, 'tcx> Lift<'tcx> for traits::ObligationCause<'a> {
- type Lifted = traits::ObligationCause<'tcx>;
- fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
- tcx.lift(&self.code).map(|code| traits::ObligationCause {
- span: self.span,
- body_id: self.body_id,
- code,
- })
+impl<'tcx> fmt::Display for traits::FromEnv<'tcx> {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ use traits::FromEnv::*;
+
+ match self {
+ Trait(trait_ref) => write!(fmt, "FromEnv({})", trait_ref),
+ Ty(ty) => write!(fmt, "FromEnv({})", ty),
+ }
}
}
-// For codegen only.
-impl<'a, 'tcx> Lift<'tcx> for traits::Vtable<'a, ()> {
- type Lifted = traits::Vtable<'tcx, ()>;
- fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
- match self.clone() {
- traits::VtableImpl(traits::VtableImplData {
- impl_def_id,
- substs,
- nested,
- }) => tcx.lift(&substs).map(|substs|
- traits::VtableImpl(traits::VtableImplData {
- impl_def_id,
- substs,
- nested,
- })
- ),
- traits::VtableAutoImpl(t) => Some(traits::VtableAutoImpl(t)),
- traits::VtableGenerator(traits::VtableGeneratorData {
- generator_def_id,
- substs,
- nested,
- }) => tcx.lift(&substs).map(|substs|
- traits::VtableGenerator(traits::VtableGeneratorData {
- generator_def_id: generator_def_id,
- substs: substs,
- nested: nested,
- })
- ),
- traits::VtableClosure(traits::VtableClosureData {
- closure_def_id,
- substs,
- nested,
- }) => tcx.lift(&substs).map(|substs|
- traits::VtableClosure(traits::VtableClosureData {
- closure_def_id,
- substs,
- nested,
- })
- ),
- traits::VtableFnPointer(traits::VtableFnPointerData { fn_ty, nested }) => {
- tcx.lift(&fn_ty).map(|fn_ty|
- traits::VtableFnPointer(traits::VtableFnPointerData { fn_ty, nested })
- )
- }
- traits::VtableParam(n) => Some(traits::VtableParam(n)),
- traits::VtableBuiltin(n) => Some(traits::VtableBuiltin(n)),
- traits::VtableObject(traits::VtableObjectData {
- upcast_trait_ref,
- vtable_base,
- nested,
- }) => tcx.lift(&upcast_trait_ref).map(|trait_ref|
- traits::VtableObject(traits::VtableObjectData {
- upcast_trait_ref: trait_ref,
- vtable_base,
- nested,
- })
- ),
- traits::VtableTraitAlias(traits::VtableTraitAliasData {
- alias_def_id,
- substs,
- nested,
- }) => tcx.lift(&substs).map(|substs|
- traits::VtableTraitAlias(traits::VtableTraitAliasData {
- alias_def_id,
- substs,
- nested,
- })
+impl<'tcx> fmt::Display for traits::DomainGoal<'tcx> {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ use traits::DomainGoal::*;
+
+ match self {
+ Holds(wc) => write!(fmt, "{}", wc),
+ WellFormed(wf) => write!(fmt, "{}", wf),
+ FromEnv(from_env) => write!(fmt, "{}", from_env),
+ Normalize(projection) => write!(
+ fmt,
+ "Normalize({} -> {})",
+ projection.projection_ty,
+ projection.ty
),
}
}
}
-///////////////////////////////////////////////////////////////////////////
-// TypeFoldable implementations.
+impl fmt::Display for traits::QuantifierKind {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ use traits::QuantifierKind::*;
-impl<'tcx, O: TypeFoldable<'tcx>> TypeFoldable<'tcx> for traits::Obligation<'tcx, O> {
- fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(&self, folder: &mut F) -> Self {
- traits::Obligation {
- cause: self.cause.clone(),
- recursion_depth: self.recursion_depth,
- predicate: self.predicate.fold_with(folder),
- param_env: self.param_env.fold_with(folder),
+ match self {
+ Universal => write!(fmt, "forall"),
+ Existential => write!(fmt, "exists"),
}
}
-
- fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
- self.predicate.visit_with(visitor)
- }
}
-BraceStructTypeFoldableImpl! {
- impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableImplData<'tcx, N> {
- impl_def_id, substs, nested
- } where N: TypeFoldable<'tcx>
-}
-
-BraceStructTypeFoldableImpl! {
- impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableGeneratorData<'tcx, N> {
- generator_def_id, substs, nested
- } where N: TypeFoldable<'tcx>
-}
-
-BraceStructTypeFoldableImpl! {
- impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableClosureData<'tcx, N> {
- closure_def_id, substs, nested
- } where N: TypeFoldable<'tcx>
-}
-
-BraceStructTypeFoldableImpl! {
- impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableAutoImplData<N> {
- trait_def_id, nested
- } where N: TypeFoldable<'tcx>
-}
-
-BraceStructTypeFoldableImpl! {
- impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableBuiltinData<N> {
- nested
- } where N: TypeFoldable<'tcx>
-}
-
-BraceStructTypeFoldableImpl! {
- impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableObjectData<'tcx, N> {
- upcast_trait_ref, vtable_base, nested
- } where N: TypeFoldable<'tcx>
-}
-
-BraceStructTypeFoldableImpl! {
- impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableFnPointerData<'tcx, N> {
- fn_ty,
- nested
- } where N: TypeFoldable<'tcx>
-}
-
-BraceStructTypeFoldableImpl! {
- impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableTraitAliasData<'tcx, N> {
- alias_def_id, substs, nested
- } where N: TypeFoldable<'tcx>
-}
-
-EnumTypeFoldableImpl! {
- impl<'tcx, N> TypeFoldable<'tcx> for traits::Vtable<'tcx, N> {
- (traits::VtableImpl)(a),
- (traits::VtableAutoImpl)(a),
- (traits::VtableGenerator)(a),
- (traits::VtableClosure)(a),
- (traits::VtableFnPointer)(a),
- (traits::VtableParam)(a),
- (traits::VtableBuiltin)(a),
- (traits::VtableObject)(a),
- (traits::VtableTraitAlias)(a),
- } where N: TypeFoldable<'tcx>
-}
-
-BraceStructTypeFoldableImpl! {
- impl<'tcx, T> TypeFoldable<'tcx> for Normalized<'tcx, T> {
- value,
- obligations
- } where T: TypeFoldable<'tcx>
-}
-
-impl<'tcx> fmt::Display for traits::WhereClause<'tcx> {
- fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
- use traits::WhereClause::*;
-
- // Bypass ppaux because it does not print out anonymous regions.
- fn write_region_name<'tcx>(
- r: ty::Region<'tcx>,
- fmt: &mut fmt::Formatter<'_>
- ) -> fmt::Result {
- match r {
- ty::ReLateBound(index, br) => match br {
- ty::BoundRegion::BrNamed(_, name) => write!(fmt, "{}", name),
- ty::BoundRegion::BrAnon(var) => {
- if *index == ty::INNERMOST {
- write!(fmt, "'^{}", var)
- } else {
- write!(fmt, "'^{}_{}", index.index(), var)
- }
- }
- _ => write!(fmt, "'_"),
- }
-
- _ => write!(fmt, "{}", r),
- }
- }
-
- match self {
- Implemented(trait_ref) => write!(fmt, "Implemented({})", trait_ref),
- ProjectionEq(projection) => write!(fmt, "ProjectionEq({})", projection),
- RegionOutlives(predicate) => {
- write!(fmt, "RegionOutlives({}: ", predicate.0)?;
- write_region_name(predicate.1, fmt)?;
- write!(fmt, ")")
- }
- TypeOutlives(predicate) => {
- write!(fmt, "TypeOutlives({}: ", predicate.0)?;
- write_region_name(predicate.1, fmt)?;
- write!(fmt, ")")
- }
- }
- }
-}
-
-impl<'tcx> fmt::Display for traits::WellFormed<'tcx> {
- fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
- use traits::WellFormed::*;
-
- match self {
- Trait(trait_ref) => write!(fmt, "WellFormed({})", trait_ref),
- Ty(ty) => write!(fmt, "WellFormed({})", ty),
- }
- }
-}
-
-impl<'tcx> fmt::Display for traits::FromEnv<'tcx> {
- fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
- use traits::FromEnv::*;
-
- match self {
- Trait(trait_ref) => write!(fmt, "FromEnv({})", trait_ref),
- Ty(ty) => write!(fmt, "FromEnv({})", ty),
- }
- }
-}
-
-impl<'tcx> fmt::Display for traits::DomainGoal<'tcx> {
- fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
- use traits::DomainGoal::*;
-
- match self {
- Holds(wc) => write!(fmt, "{}", wc),
- WellFormed(wf) => write!(fmt, "{}", wf),
- FromEnv(from_env) => write!(fmt, "{}", from_env),
- Normalize(projection) => write!(
- fmt,
- "Normalize({} -> {})",
- projection.projection_ty,
- projection.ty
- ),
- }
- }
-}
-
-impl fmt::Display for traits::QuantifierKind {
- fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
- use traits::QuantifierKind::*;
-
- match self {
- Universal => write!(fmt, "forall"),
- Existential => write!(fmt, "exists"),
- }
- }
-}
-
-/// Collect names for regions / types bound by a quantified goal / clause.
-/// This collector does not try to do anything clever like in ppaux, it's just used
-/// for debug output in tests anyway.
-struct BoundNamesCollector {
- // Just sort by name because `BoundRegion::BrNamed` does not have a `BoundVar` index anyway.
- regions: BTreeSet<InternedString>,
-
- // Sort by `BoundVar` index, so usually this should be equivalent to the order given
- // by the list of type parameters.
- types: BTreeMap<u32, InternedString>,
-
- binder_index: ty::DebruijnIndex,
+/// Collect names for regions / types bound by a quantified goal / clause.
+/// This collector does not try to do anything clever like in ppaux, it's just used
+/// for debug output in tests anyway.
+struct BoundNamesCollector {
+ // Just sort by name because `BoundRegion::BrNamed` does not have a `BoundVar` index anyway.
+ regions: BTreeSet<InternedString>,
+
+ // Sort by `BoundVar` index, so usually this should be equivalent to the order given
+ // by the list of type parameters.
+ types: BTreeMap<u32, InternedString>,
+
+ binder_index: ty::DebruijnIndex,
}
impl BoundNamesCollector {
}
}
-impl<'tcx> fmt::Display for traits::Goal<'tcx> {
- fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
- use traits::GoalKind::*;
-
- match self {
- Implies(hypotheses, goal) => {
- write!(fmt, "if (")?;
- for (index, hyp) in hypotheses.iter().enumerate() {
- if index > 0 {
- write!(fmt, ", ")?;
- }
- write!(fmt, "{}", hyp)?;
- }
- write!(fmt, ") {{ {} }}", goal)
+impl<'tcx> fmt::Display for traits::Goal<'tcx> {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ use traits::GoalKind::*;
+
+ match self {
+ Implies(hypotheses, goal) => {
+ write!(fmt, "if (")?;
+ for (index, hyp) in hypotheses.iter().enumerate() {
+ if index > 0 {
+ write!(fmt, ", ")?;
+ }
+ write!(fmt, "{}", hyp)?;
+ }
+ write!(fmt, ") {{ {} }}", goal)
+ }
+ And(goal1, goal2) => write!(fmt, "({} && {})", goal1, goal2),
+ Not(goal) => write!(fmt, "not {{ {} }}", goal),
+ DomainGoal(goal) => write!(fmt, "{}", goal),
+ Quantified(qkind, goal) => {
+ let mut collector = BoundNamesCollector::new();
+ goal.skip_binder().visit_with(&mut collector);
+
+ if !collector.is_empty() {
+ write!(fmt, "{}<", qkind)?;
+ collector.write_names(fmt)?;
+ write!(fmt, "> {{ ")?;
+ }
+
+ write!(fmt, "{}", goal.skip_binder())?;
+
+ if !collector.is_empty() {
+ write!(fmt, " }}")?;
+ }
+
+ Ok(())
+ }
+ CannotProve => write!(fmt, "CannotProve"),
+ }
+ }
+}
+
+impl<'tcx> fmt::Display for traits::ProgramClause<'tcx> {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ let traits::ProgramClause { goal, hypotheses, .. } = self;
+ write!(fmt, "{}", goal)?;
+ if !hypotheses.is_empty() {
+ write!(fmt, " :- ")?;
+ for (index, condition) in hypotheses.iter().enumerate() {
+ if index > 0 {
+ write!(fmt, ", ")?;
+ }
+ write!(fmt, "{}", condition)?;
+ }
+ }
+ write!(fmt, ".")
+ }
+}
+
+impl<'tcx> fmt::Display for traits::Clause<'tcx> {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ use traits::Clause::*;
+
+ match self {
+ Implies(clause) => write!(fmt, "{}", clause),
+ ForAll(clause) => {
+ let mut collector = BoundNamesCollector::new();
+ clause.skip_binder().visit_with(&mut collector);
+
+ if !collector.is_empty() {
+ write!(fmt, "forall<")?;
+ collector.write_names(fmt)?;
+ write!(fmt, "> {{ ")?;
+ }
+
+ write!(fmt, "{}", clause.skip_binder())?;
+
+ if !collector.is_empty() {
+ write!(fmt, " }}")?;
+ }
+
+ Ok(())
+ }
+ }
+ }
+}
+
+///////////////////////////////////////////////////////////////////////////
+// Lift implementations
+
+impl<'a, 'tcx> Lift<'tcx> for traits::SelectionError<'a> {
+ type Lifted = traits::SelectionError<'tcx>;
+ fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
+ match *self {
+ super::Unimplemented => Some(super::Unimplemented),
+ super::OutputTypeParameterMismatch(a, b, ref err) => {
+ tcx.lift(&(a, b)).and_then(|(a, b)|
+ tcx.lift(err)
+ .map(|err| super::OutputTypeParameterMismatch(a, b, err))
+ )
+ }
+ super::TraitNotObjectSafe(def_id) => Some(super::TraitNotObjectSafe(def_id)),
+ super::ConstEvalFailure(err) => Some(super::ConstEvalFailure(err)),
+ super::Overflow => Some(super::Overflow),
+ }
+ }
+}
+
+impl<'a, 'tcx> Lift<'tcx> for traits::ObligationCauseCode<'a> {
+ type Lifted = traits::ObligationCauseCode<'tcx>;
+ fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
+ match *self {
+ super::ReturnNoExpression => Some(super::ReturnNoExpression),
+ super::MiscObligation => Some(super::MiscObligation),
+ super::SliceOrArrayElem => Some(super::SliceOrArrayElem),
+ super::TupleElem => Some(super::TupleElem),
+ super::ProjectionWf(proj) => tcx.lift(&proj).map(super::ProjectionWf),
+ super::ItemObligation(def_id) => Some(super::ItemObligation(def_id)),
+ super::ReferenceOutlivesReferent(ty) => {
+ tcx.lift(&ty).map(super::ReferenceOutlivesReferent)
+ }
+ super::ObjectTypeBound(ty, r) => tcx.lift(&ty).and_then(|ty|
+ tcx.lift(&r)
+ .and_then(|r| Some(super::ObjectTypeBound(ty, r)))
+ ),
+ super::ObjectCastObligation(ty) => tcx.lift(&ty).map(super::ObjectCastObligation),
+ super::AssignmentLhsSized => Some(super::AssignmentLhsSized),
+ super::TupleInitializerSized => Some(super::TupleInitializerSized),
+ super::StructInitializerSized => Some(super::StructInitializerSized),
+ super::VariableType(id) => Some(super::VariableType(id)),
+ super::ReturnType(id) => Some(super::ReturnType(id)),
+ super::SizedArgumentType => Some(super::SizedArgumentType),
+ super::SizedReturnType => Some(super::SizedReturnType),
+ super::SizedYieldType => Some(super::SizedYieldType),
+ super::RepeatVec => Some(super::RepeatVec),
+ super::FieldSized { adt_kind, last } => Some(super::FieldSized { adt_kind, last }),
+ super::ConstSized => Some(super::ConstSized),
+ super::SharedStatic => Some(super::SharedStatic),
+ super::BuiltinDerivedObligation(ref cause) => {
+ tcx.lift(cause).map(super::BuiltinDerivedObligation)
+ }
+ super::ImplDerivedObligation(ref cause) => {
+ tcx.lift(cause).map(super::ImplDerivedObligation)
+ }
+ super::CompareImplMethodObligation {
+ item_name,
+ impl_item_def_id,
+ trait_item_def_id,
+ } => Some(super::CompareImplMethodObligation {
+ item_name,
+ impl_item_def_id,
+ trait_item_def_id,
+ }),
+ super::ExprAssignable => Some(super::ExprAssignable),
+ super::MatchExpressionArm { arm_span, source } => Some(super::MatchExpressionArm {
+ arm_span,
+ source: source,
+ }),
+ super::IfExpression => Some(super::IfExpression),
+ super::IfExpressionWithNoElse => Some(super::IfExpressionWithNoElse),
+ super::MainFunctionType => Some(super::MainFunctionType),
+ super::StartFunctionType => Some(super::StartFunctionType),
+ super::IntrinsicType => Some(super::IntrinsicType),
+ super::MethodReceiver => Some(super::MethodReceiver),
+ super::BlockTailExpression(id) => Some(super::BlockTailExpression(id)),
+ super::TrivialBound => Some(super::TrivialBound),
+ }
+ }
+}
+
+impl<'a, 'tcx> Lift<'tcx> for traits::DerivedObligationCause<'a> {
+ type Lifted = traits::DerivedObligationCause<'tcx>;
+ fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
+ tcx.lift(&self.parent_trait_ref).and_then(|trait_ref|
+ tcx.lift(&*self.parent_code)
+ .map(|code| traits::DerivedObligationCause {
+ parent_trait_ref: trait_ref,
+ parent_code: Rc::new(code),
+ })
+ )
+ }
+}
+
+impl<'a, 'tcx> Lift<'tcx> for traits::ObligationCause<'a> {
+ type Lifted = traits::ObligationCause<'tcx>;
+ fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
+ tcx.lift(&self.code).map(|code| traits::ObligationCause {
+ span: self.span,
+ body_id: self.body_id,
+ code,
+ })
+ }
+}
+
+// For codegen only.
+impl<'a, 'tcx> Lift<'tcx> for traits::Vtable<'a, ()> {
+ type Lifted = traits::Vtable<'tcx, ()>;
+ fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
+ match self.clone() {
+ traits::VtableImpl(traits::VtableImplData {
+ impl_def_id,
+ substs,
+ nested,
+ }) => tcx.lift(&substs).map(|substs|
+ traits::VtableImpl(traits::VtableImplData {
+ impl_def_id,
+ substs,
+ nested,
+ })
+ ),
+ traits::VtableAutoImpl(t) => Some(traits::VtableAutoImpl(t)),
+ traits::VtableGenerator(traits::VtableGeneratorData {
+ generator_def_id,
+ substs,
+ nested,
+ }) => tcx.lift(&substs).map(|substs|
+ traits::VtableGenerator(traits::VtableGeneratorData {
+ generator_def_id: generator_def_id,
+ substs: substs,
+ nested: nested,
+ })
+ ),
+ traits::VtableClosure(traits::VtableClosureData {
+ closure_def_id,
+ substs,
+ nested,
+ }) => tcx.lift(&substs).map(|substs|
+ traits::VtableClosure(traits::VtableClosureData {
+ closure_def_id,
+ substs,
+ nested,
+ })
+ ),
+ traits::VtableFnPointer(traits::VtableFnPointerData { fn_ty, nested }) => {
+ tcx.lift(&fn_ty).map(|fn_ty|
+ traits::VtableFnPointer(traits::VtableFnPointerData { fn_ty, nested })
+ )
+ }
+ traits::VtableParam(n) => Some(traits::VtableParam(n)),
+ traits::VtableBuiltin(n) => Some(traits::VtableBuiltin(n)),
+ traits::VtableObject(traits::VtableObjectData {
+ upcast_trait_ref,
+ vtable_base,
+ nested,
+ }) => tcx.lift(&upcast_trait_ref).map(|trait_ref|
+ traits::VtableObject(traits::VtableObjectData {
+ upcast_trait_ref: trait_ref,
+ vtable_base,
+ nested,
+ })
+ ),
+ traits::VtableTraitAlias(traits::VtableTraitAliasData {
+ alias_def_id,
+ substs,
+ nested,
+ }) => tcx.lift(&substs).map(|substs|
+ traits::VtableTraitAlias(traits::VtableTraitAliasData {
+ alias_def_id,
+ substs,
+ nested,
+ })
+ ),
+ }
+ }
+}
+
+EnumLiftImpl! {
+ impl<'a, 'tcx> Lift<'tcx> for traits::WhereClause<'a> {
+ type Lifted = traits::WhereClause<'tcx>;
+ (traits::WhereClause::Implemented)(trait_ref),
+ (traits::WhereClause::ProjectionEq)(projection),
+ (traits::WhereClause::TypeOutlives)(ty_outlives),
+ (traits::WhereClause::RegionOutlives)(region_outlives),
+ }
+}
+
+EnumLiftImpl! {
+ impl<'a, 'tcx> Lift<'tcx> for traits::WellFormed<'a> {
+ type Lifted = traits::WellFormed<'tcx>;
+ (traits::WellFormed::Trait)(trait_ref),
+ (traits::WellFormed::Ty)(ty),
+ }
+}
+
+EnumLiftImpl! {
+ impl<'a, 'tcx> Lift<'tcx> for traits::FromEnv<'a> {
+ type Lifted = traits::FromEnv<'tcx>;
+ (traits::FromEnv::Trait)(trait_ref),
+ (traits::FromEnv::Ty)(ty),
+ }
+}
+
+EnumLiftImpl! {
+ impl<'a, 'tcx> Lift<'tcx> for traits::DomainGoal<'a> {
+ type Lifted = traits::DomainGoal<'tcx>;
+ (traits::DomainGoal::Holds)(wc),
+ (traits::DomainGoal::WellFormed)(wf),
+ (traits::DomainGoal::FromEnv)(from_env),
+ (traits::DomainGoal::Normalize)(projection),
+ }
+}
+
+EnumLiftImpl! {
+ impl<'a, 'tcx> Lift<'tcx> for traits::GoalKind<'a> {
+ type Lifted = traits::GoalKind<'tcx>;
+ (traits::GoalKind::Implies)(hypotheses, goal),
+ (traits::GoalKind::And)(goal1, goal2),
+ (traits::GoalKind::Not)(goal),
+ (traits::GoalKind::DomainGoal)(domain_goal),
+ (traits::GoalKind::Quantified)(kind, goal),
+ (traits::GoalKind::CannotProve),
+ }
+}
+
+impl<'a, 'tcx> Lift<'tcx> for traits::Environment<'a> {
+ type Lifted = traits::Environment<'tcx>;
+ fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
+ tcx.lift(&self.clauses).map(|clauses| {
+ traits::Environment {
+ clauses,
}
- And(goal1, goal2) => write!(fmt, "({} && {})", goal1, goal2),
- Not(goal) => write!(fmt, "not {{ {} }}", goal),
- DomainGoal(goal) => write!(fmt, "{}", goal),
- Quantified(qkind, goal) => {
- let mut collector = BoundNamesCollector::new();
- goal.skip_binder().visit_with(&mut collector);
+ })
+ }
+}
- if !collector.is_empty() {
- write!(fmt, "{}<", qkind)?;
- collector.write_names(fmt)?;
- write!(fmt, "> {{ ")?;
+impl<'a, 'tcx, G: Lift<'tcx>> Lift<'tcx> for traits::InEnvironment<'a, G> {
+ type Lifted = traits::InEnvironment<'tcx, G::Lifted>;
+ fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
+ tcx.lift(&self.environment).and_then(|environment| {
+ tcx.lift(&self.goal).map(|goal| {
+ traits::InEnvironment {
+ environment,
+ goal,
}
+ })
+ })
+ }
+}
- write!(fmt, "{}", goal.skip_binder())?;
-
- if !collector.is_empty() {
- write!(fmt, " }}")?;
- }
+impl<'tcx, C> Lift<'tcx> for chalk_engine::ExClause<C>
+where
+ C: chalk_engine::context::Context + Clone,
+ C: traits::ExClauseLift<'tcx>,
+{
+ type Lifted = C::LiftedExClause;
- Ok(())
- }
- CannotProve => write!(fmt, "CannotProve"),
- }
+ fn lift_to_tcx<'a, 'gcx>(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> Option<Self::Lifted> {
+ <C as traits::ExClauseLift>::lift_ex_clause_to_tcx(self, tcx)
}
}
-impl<'tcx> fmt::Display for traits::ProgramClause<'tcx> {
- fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
- let traits::ProgramClause { goal, hypotheses, .. } = self;
- write!(fmt, "{}", goal)?;
- if !hypotheses.is_empty() {
- write!(fmt, " :- ")?;
- for (index, condition) in hypotheses.iter().enumerate() {
- if index > 0 {
- write!(fmt, ", ")?;
- }
- write!(fmt, "{}", condition)?;
- }
+///////////////////////////////////////////////////////////////////////////
+// TypeFoldable implementations.
+
+impl<'tcx, O: TypeFoldable<'tcx>> TypeFoldable<'tcx> for traits::Obligation<'tcx, O> {
+ fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(&self, folder: &mut F) -> Self {
+ traits::Obligation {
+ cause: self.cause.clone(),
+ recursion_depth: self.recursion_depth,
+ predicate: self.predicate.fold_with(folder),
+ param_env: self.param_env.fold_with(folder),
}
- write!(fmt, ".")
+ }
+
+ fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
+ self.predicate.visit_with(visitor)
}
}
-impl<'tcx> fmt::Display for traits::Clause<'tcx> {
- fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
- use traits::Clause::*;
+BraceStructTypeFoldableImpl! {
+ impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableImplData<'tcx, N> {
+ impl_def_id, substs, nested
+ } where N: TypeFoldable<'tcx>
+}
- match self {
- Implies(clause) => write!(fmt, "{}", clause),
- ForAll(clause) => {
- let mut collector = BoundNamesCollector::new();
- clause.skip_binder().visit_with(&mut collector);
+BraceStructTypeFoldableImpl! {
+ impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableGeneratorData<'tcx, N> {
+ generator_def_id, substs, nested
+ } where N: TypeFoldable<'tcx>
+}
- if !collector.is_empty() {
- write!(fmt, "forall<")?;
- collector.write_names(fmt)?;
- write!(fmt, "> {{ ")?;
- }
+BraceStructTypeFoldableImpl! {
+ impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableClosureData<'tcx, N> {
+ closure_def_id, substs, nested
+ } where N: TypeFoldable<'tcx>
+}
- write!(fmt, "{}", clause.skip_binder())?;
+BraceStructTypeFoldableImpl! {
+ impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableAutoImplData<N> {
+ trait_def_id, nested
+ } where N: TypeFoldable<'tcx>
+}
- if !collector.is_empty() {
- write!(fmt, " }}")?;
- }
+BraceStructTypeFoldableImpl! {
+ impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableBuiltinData<N> {
+ nested
+ } where N: TypeFoldable<'tcx>
+}
- Ok(())
- }
- }
- }
+BraceStructTypeFoldableImpl! {
+ impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableObjectData<'tcx, N> {
+ upcast_trait_ref, vtable_base, nested
+ } where N: TypeFoldable<'tcx>
+}
+
+BraceStructTypeFoldableImpl! {
+ impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableFnPointerData<'tcx, N> {
+ fn_ty,
+ nested
+ } where N: TypeFoldable<'tcx>
+}
+
+BraceStructTypeFoldableImpl! {
+ impl<'tcx, N> TypeFoldable<'tcx> for traits::VtableTraitAliasData<'tcx, N> {
+ alias_def_id, substs, nested
+ } where N: TypeFoldable<'tcx>
}
EnumTypeFoldableImpl! {
- impl<'tcx> TypeFoldable<'tcx> for traits::WhereClause<'tcx> {
- (traits::WhereClause::Implemented)(trait_ref),
- (traits::WhereClause::ProjectionEq)(projection),
- (traits::WhereClause::TypeOutlives)(ty_outlives),
- (traits::WhereClause::RegionOutlives)(region_outlives),
- }
+ impl<'tcx, N> TypeFoldable<'tcx> for traits::Vtable<'tcx, N> {
+ (traits::VtableImpl)(a),
+ (traits::VtableAutoImpl)(a),
+ (traits::VtableGenerator)(a),
+ (traits::VtableClosure)(a),
+ (traits::VtableFnPointer)(a),
+ (traits::VtableParam)(a),
+ (traits::VtableBuiltin)(a),
+ (traits::VtableObject)(a),
+ (traits::VtableTraitAlias)(a),
+ } where N: TypeFoldable<'tcx>
}
-EnumLiftImpl! {
- impl<'a, 'tcx> Lift<'tcx> for traits::WhereClause<'a> {
- type Lifted = traits::WhereClause<'tcx>;
+BraceStructTypeFoldableImpl! {
+ impl<'tcx, T> TypeFoldable<'tcx> for Normalized<'tcx, T> {
+ value,
+ obligations
+ } where T: TypeFoldable<'tcx>
+}
+
+EnumTypeFoldableImpl! {
+ impl<'tcx> TypeFoldable<'tcx> for traits::WhereClause<'tcx> {
(traits::WhereClause::Implemented)(trait_ref),
(traits::WhereClause::ProjectionEq)(projection),
(traits::WhereClause::TypeOutlives)(ty_outlives),
}
}
-EnumLiftImpl! {
- impl<'a, 'tcx> Lift<'tcx> for traits::WellFormed<'a> {
- type Lifted = traits::WellFormed<'tcx>;
- (traits::WellFormed::Trait)(trait_ref),
- (traits::WellFormed::Ty)(ty),
- }
-}
-
EnumTypeFoldableImpl! {
impl<'tcx> TypeFoldable<'tcx> for traits::FromEnv<'tcx> {
(traits::FromEnv::Trait)(trait_ref),
}
}
-EnumLiftImpl! {
- impl<'a, 'tcx> Lift<'tcx> for traits::FromEnv<'a> {
- type Lifted = traits::FromEnv<'tcx>;
- (traits::FromEnv::Trait)(trait_ref),
- (traits::FromEnv::Ty)(ty),
- }
-}
-
EnumTypeFoldableImpl! {
impl<'tcx> TypeFoldable<'tcx> for traits::DomainGoal<'tcx> {
(traits::DomainGoal::Holds)(wc),
}
}
-EnumLiftImpl! {
- impl<'a, 'tcx> Lift<'tcx> for traits::DomainGoal<'a> {
- type Lifted = traits::DomainGoal<'tcx>;
- (traits::DomainGoal::Holds)(wc),
- (traits::DomainGoal::WellFormed)(wf),
- (traits::DomainGoal::FromEnv)(from_env),
- (traits::DomainGoal::Normalize)(projection),
- }
-}
-
CloneTypeFoldableAndLiftImpls! {
traits::QuantifierKind,
}
}
}
-EnumLiftImpl! {
- impl<'a, 'tcx> Lift<'tcx> for traits::GoalKind<'a> {
- type Lifted = traits::GoalKind<'tcx>;
- (traits::GoalKind::Implies)(hypotheses, goal),
- (traits::GoalKind::And)(goal1, goal2),
- (traits::GoalKind::Not)(goal),
- (traits::GoalKind::DomainGoal)(domain_goal),
- (traits::GoalKind::Quantified)(kind, goal),
- (traits::GoalKind::CannotProve),
- }
-}
-
impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<traits::Goal<'tcx>> {
fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(&self, folder: &mut F) -> Self {
let v = self.iter()
} where G: TypeFoldable<'tcx>
}
-impl<'a, 'tcx> Lift<'tcx> for traits::Environment<'a> {
- type Lifted = traits::Environment<'tcx>;
- fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
- tcx.lift(&self.clauses).map(|clauses| {
- traits::Environment {
- clauses,
- }
- })
- }
-}
-
-impl<'a, 'tcx, G: Lift<'tcx>> Lift<'tcx> for traits::InEnvironment<'a, G> {
- type Lifted = traits::InEnvironment<'tcx, G::Lifted>;
- fn lift_to_tcx<'b, 'gcx>(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Self::Lifted> {
- tcx.lift(&self.environment).and_then(|environment| {
- tcx.lift(&self.goal).map(|goal| {
- traits::InEnvironment {
- environment,
- goal,
- }
- })
- })
- }
-}
-
impl<'tcx> TypeFoldable<'tcx> for traits::Clauses<'tcx> {
fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(&self, folder: &mut F) -> Self {
let v = self.iter()
}
}
-impl<'tcx, C> Lift<'tcx> for chalk_engine::ExClause<C>
-where
- C: chalk_engine::context::Context + Clone,
- C: traits::ExClauseLift<'tcx>,
-{
- type Lifted = C::LiftedExClause;
-
- fn lift_to_tcx<'a, 'gcx>(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> Option<Self::Lifted> {
- <C as traits::ExClauseLift>::lift_ex_clause_to_tcx(self, tcx)
- }
-}
-
EnumTypeFoldableImpl! {
impl<'tcx, C> TypeFoldable<'tcx> for chalk_engine::DelayedLiteral<C> {
(chalk_engine::DelayedLiteral::CannotProve)(a),
projects / rust.git / commitdiff