bjoernager/rust
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Auto merge of #78027 - lcnr:lift-by-value, r=varkor

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Lift: take self by value

seems small enough to not warrant an MCP 🤷
This commit is contained in:
bors 2020-10-21 23:09:38 +00:00
commit c4fe25d861
15 changed files with 139 additions and 167 deletions
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4
compiler/rustc_middle/src/macros.rs
View file

@ -29,8 +29,8 @@ macro_rules! CloneLiftImpls {
$(
impl<$tcx> $crate::ty::Lift<$tcx> for $ty {
type Lifted = Self;
fn lift_to_tcx(&self, _: $crate::ty::TyCtxt<$tcx>) -> Option<Self> {
Some(Clone::clone(self))
fn lift_to_tcx(self, _: $crate::ty::TyCtxt<$tcx>) -> Option<Self> {
Some(self)
}
}
)+

6
compiler/rustc_middle/src/mir/mod.rs
View file

@ -2210,7 +2210,7 @@ impl<'tcx> Debug for Rvalue<'tcx> {
let name = ty::tls::with(|tcx| {
let mut name = String::new();
let substs = tcx.lift(&substs).expect("could not lift for printing");
let substs = tcx.lift(substs).expect("could not lift for printing");
FmtPrinter::new(tcx, &mut name, Namespace::ValueNS)
.print_def_path(variant_def.def_id, substs)?;
Ok(name)
@ -2233,7 +2233,7 @@ impl<'tcx> Debug for Rvalue<'tcx> {
if let Some(def_id) = def_id.as_local() {
let hir_id = tcx.hir().local_def_id_to_hir_id(def_id);
let name = if tcx.sess.opts.debugging_opts.span_free_formats {
let substs = tcx.lift(&substs).unwrap();
let substs = tcx.lift(substs).unwrap();
format!(
"[closure@{}]",
tcx.def_path_str_with_substs(def_id.to_def_id(), substs),
@ -2527,7 +2527,7 @@ fn pretty_print_const(
) -> fmt::Result {
use crate::ty::print::PrettyPrinter;
ty::tls::with(|tcx| {
let literal = tcx.lift(&c).unwrap();
let literal = tcx.lift(c).unwrap();
let mut cx = FmtPrinter::new(tcx, fmt, Namespace::ValueNS);
cx.print_alloc_ids = true;
cx.pretty_print_const(literal, print_types)?;

2
compiler/rustc_middle/src/mir/terminator.rs
View file

@ -535,7 +535,7 @@ impl<'tcx> TerminatorKind<'tcx> {
Goto { .. } => vec!["".into()],
SwitchInt { ref targets, switch_ty, .. } => ty::tls::with(|tcx| {
let param_env = ty::ParamEnv::empty();
let switch_ty = tcx.lift(&switch_ty).unwrap();
let switch_ty = tcx.lift(switch_ty).unwrap();
let size = tcx.layout_of(param_env.and(switch_ty)).unwrap().size;
targets
.values

16
compiler/rustc_middle/src/ty/context.rs
View file

@ -1060,7 +1060,7 @@ impl<'tcx> TyCtxt<'tcx> {
)
}
pub fn lift<T: ?Sized + Lift<'tcx>>(self, value: &T) -> Option<T::Lifted> {
pub fn lift<T: Lift<'tcx>>(self, value: T) -> Option<T::Lifted> {
value.lift_to_tcx(self)
}
@ -1569,16 +1569,16 @@ impl<'tcx> TyCtxt<'tcx> {
/// e.g., `()` or `u8`, was interned in a different context.
pub trait Lift<'tcx>: fmt::Debug {
type Lifted: fmt::Debug + 'tcx;
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted>;
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted>;
}
macro_rules! nop_lift {
($set:ident; $ty:ty => $lifted:ty) => {
impl<'a, 'tcx> Lift<'tcx> for $ty {
type Lifted = $lifted;
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
if tcx.interners.$set.contains_pointer_to(&Interned(*self)) {
Some(unsafe { mem::transmute(*self) })
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
if tcx.interners.$set.contains_pointer_to(&Interned(self)) {
Some(unsafe { mem::transmute(self) })
} else {
None
}
@ -1591,12 +1591,12 @@ macro_rules! nop_list_lift {
($set:ident; $ty:ty => $lifted:ty) => {
impl<'a, 'tcx> Lift<'tcx> for &'a List<$ty> {
type Lifted = &'tcx List<$lifted>;
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
if self.is_empty() {
return Some(List::empty());
}
if tcx.interners.$set.contains_pointer_to(&Interned(*self)) {
Some(unsafe { mem::transmute(*self) })
if tcx.interners.$set.contains_pointer_to(&Interned(self)) {
Some(unsafe { mem::transmute(self) })
} else {
None
}

2
compiler/rustc_middle/src/ty/error.rs
View file

@ -229,7 +229,7 @@ impl<'tcx> ty::TyS<'tcx> {
ty::Adt(def, _) => format!("{} `{}`", def.descr(), tcx.def_path_str(def.did)).into(),
ty::Foreign(def_id) => format!("extern type `{}`", tcx.def_path_str(def_id)).into(),
ty::Array(t, n) => {
let n = tcx.lift(&n).unwrap();
let n = tcx.lift(n).unwrap();
match n.try_eval_usize(tcx, ty::ParamEnv::empty()) {
_ if t.is_simple_ty() => format!("array `{}`", self).into(),
Some(n) => format!("array of {} element{}", n, pluralize!(n)).into(),

2
compiler/rustc_middle/src/ty/instance.rs
View file

@ -258,7 +258,7 @@ impl<'tcx> InstanceDef<'tcx> {
impl<'tcx> fmt::Display for Instance<'tcx> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
ty::tls::with(|tcx| {
let substs = tcx.lift(&self.substs).expect("could not lift for printing");
let substs = tcx.lift(self.substs).expect("could not lift for printing");
FmtPrinter::new(tcx, &mut *f, Namespace::ValueNS)
.print_def_path(self.def_id(), substs)?;
Ok(())

2
compiler/rustc_middle/src/ty/print/pretty.rs
View file

@ -1848,7 +1848,7 @@ macro_rules! forward_display_to_print {
$(impl fmt::Display for $ty {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
ty::tls::with(|tcx| {
tcx.lift(self)
tcx.lift(*self)
.expect("could not lift for printing")
.print(FmtPrinter::new(tcx, f, Namespace::TypeNS))?;
Ok(())

224
compiler/rustc_middle/src/ty/structural_impls.rs
View file

@ -332,24 +332,23 @@ CloneTypeFoldableAndLiftImpls! {
// 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> {
tcx.lift(&self.0).and_then(|a| tcx.lift(&self.1).map(|b| (a, b)))
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> {
tcx.lift(&self.0)
.and_then(|a| tcx.lift(&self.1).and_then(|b| tcx.lift(&self.2).map(|c| (a, b, c))))
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(ref x) => tcx.lift(x).map(Some),
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
match self {
Some(x) => tcx.lift(x).map(Some),
None => Some(None),
}
}
@ -357,89 +356,72 @@ impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for Option<T> {
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(ref x) => tcx.lift(x).map(Ok),
Err(ref e) => tcx.lift(e).map(Err),
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)
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
tcx.lift(*self).map(Box::new)
}
}
impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for Rc<T> {
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).map(Rc::new)
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>> Lift<'tcx> for Arc<T> {
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).map(Arc::new)
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 [T] {
type Lifted = Vec<T::Lifted>;
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
// type annotation needed to inform `projection_must_outlive`
let mut result: Vec<<T as Lift<'tcx>>::Lifted> = Vec::with_capacity(self.len());
for x in self {
if let Some(value) = tcx.lift(x) {
result.push(value);
} else {
return None;
}
}
Some(result)
}
}
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> {
tcx.lift(&self[..])
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.iter().map(|e| tcx.lift(e)).collect()
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 })
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 })
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> {
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))
Some(ty::ExistentialPredicate::AutoTrait(def_id))
}
}
}
@ -447,15 +429,15 @@ impl<'a, 'tcx> Lift<'tcx> for ty::ExistentialPredicate<'a> {
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 })
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 {
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,
@ -465,33 +447,33 @@ impl<'a, 'tcx> Lift<'tcx> for ty::SubtypePredicate<'a> {
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))
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)
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))
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 {
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"),
ty: tcx.lift(self.ty).expect("type must lift when substs do"),
item_def_id: self.item_def_id,
})
}
@ -499,7 +481,7 @@ impl<'a, 'tcx> Lift<'tcx> for ty::ExistentialProjection<'a> {
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> {
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
match self {
ty::PredicateKind::ForAll(binder) => tcx.lift(binder).map(ty::PredicateKind::ForAll),
ty::PredicateKind::Atom(atom) => tcx.lift(atom).map(ty::PredicateKind::Atom),
@ -509,24 +491,24 @@ impl<'a, 'tcx> Lift<'tcx> for ty::PredicateKind<'a> {
impl<'a, 'tcx> Lift<'tcx> for ty::PredicateAtom<'a> {
type Lifted = ty::PredicateAtom<'tcx>;
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
match *self {
ty::PredicateAtom::Trait(ref data, constness) => {
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
match self {
ty::PredicateAtom::Trait(data, constness) => {
tcx.lift(data).map(|data| ty::PredicateAtom::Trait(data, constness))
}
ty::PredicateAtom::Subtype(ref data) => tcx.lift(data).map(ty::PredicateAtom::Subtype),
ty::PredicateAtom::RegionOutlives(ref data) => {
ty::PredicateAtom::Subtype(data) => tcx.lift(data).map(ty::PredicateAtom::Subtype),
ty::PredicateAtom::RegionOutlives(data) => {
tcx.lift(data).map(ty::PredicateAtom::RegionOutlives)
}
ty::PredicateAtom::TypeOutlives(ref data) => {
ty::PredicateAtom::TypeOutlives(data) => {
tcx.lift(data).map(ty::PredicateAtom::TypeOutlives)
}
ty::PredicateAtom::Projection(ref data) => {
ty::PredicateAtom::Projection(data) => {
tcx.lift(data).map(ty::PredicateAtom::Projection)
}
ty::PredicateAtom::WellFormed(ty) => tcx.lift(&ty).map(ty::PredicateAtom::WellFormed),
ty::PredicateAtom::WellFormed(ty) => tcx.lift(ty).map(ty::PredicateAtom::WellFormed),
ty::PredicateAtom::ClosureKind(closure_def_id, closure_substs, kind) => {
tcx.lift(&closure_substs).map(|closure_substs| {
tcx.lift(closure_substs).map(|closure_substs| {
ty::PredicateAtom::ClosureKind(closure_def_id, closure_substs, kind)
})
}
@ -534,13 +516,13 @@ impl<'a, 'tcx> Lift<'tcx> for ty::PredicateAtom<'a> {
Some(ty::PredicateAtom::ObjectSafe(trait_def_id))
}
ty::PredicateAtom::ConstEvaluatable(def_id, substs) => {
tcx.lift(&substs).map(|substs| ty::PredicateAtom::ConstEvaluatable(def_id, substs))
tcx.lift(substs).map(|substs| ty::PredicateAtom::ConstEvaluatable(def_id, substs))
}
ty::PredicateAtom::ConstEquate(c1, c2) => {
tcx.lift(&(c1, c2)).map(|(c1, c2)| ty::PredicateAtom::ConstEquate(c1, c2))
tcx.lift((c1, c2)).map(|(c1, c2)| ty::PredicateAtom::ConstEquate(c1, c2))
}
ty::PredicateAtom::TypeWellFormedFromEnv(ty) => {
tcx.lift(&ty).map(ty::PredicateAtom::TypeWellFormedFromEnv)
tcx.lift(ty).map(ty::PredicateAtom::TypeWellFormedFromEnv)
}
}
}
@ -548,61 +530,62 @@ impl<'a, 'tcx> Lift<'tcx> for ty::PredicateAtom<'a> {
impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for ty::Binder<T> {
type Lifted = ty::Binder<T::Lifted>;
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
tcx.lift(self.as_ref().skip_binder()).map(|v| self.rebind(v))
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
self.map_bound(|v| tcx.lift(v)).transpose()
}
}
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())
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 })
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 })
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 })
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> {
tcx.lift(&self.kind).and_then(|kind| {
tcx.lift(&self.target).map(|target| ty::adjustment::Adjustment { kind, target })
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 {
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(ref overloaded) => {
ty::adjustment::Adjust::Deref(overloaded) => {
tcx.lift(overloaded).map(ty::adjustment::Adjust::Deref)
}
ty::adjustment::Adjust::Borrow(ref autoref) => {
ty::adjustment::Adjust::Borrow(autoref) => {
tcx.lift(autoref).map(ty::adjustment::Adjust::Borrow)
}
}
@ -611,8 +594,8 @@ impl<'a, 'tcx> Lift<'tcx> for ty::adjustment::Adjust<'a> {
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 {
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,
@ -622,10 +605,10 @@ impl<'a, 'tcx> Lift<'tcx> for ty::adjustment::OverloadedDeref<'a> {
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 {
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))
tcx.lift(r).map(|r| ty::adjustment::AutoBorrow::Ref(r, m))
}
ty::adjustment::AutoBorrow::RawPtr(m) => Some(ty::adjustment::AutoBorrow::RawPtr(m)),
}
@ -634,16 +617,16 @@ impl<'a, 'tcx> Lift<'tcx> for ty::adjustment::AutoBorrow<'a> {
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))
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 {
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,
@ -654,19 +637,20 @@ impl<'a, 'tcx> Lift<'tcx> for ty::FnSig<'a> {
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> {
tcx.lift(&self.expected).and_then(|expected| {
tcx.lift(&self.found).map(|found| ty::error::ExpectedFound { expected, found })
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> {
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
use crate::ty::error::TypeError::*;
Some(match *self {
Some(match self {
Mismatch => Mismatch,
UnsafetyMismatch(x) => UnsafetyMismatch(x),
AbiMismatch(x) => AbiMismatch(x),
@ -675,51 +659,51 @@ impl<'a, 'tcx> Lift<'tcx> for ty::error::TypeError<'a> {
FixedArraySize(x) => FixedArraySize(x),
ArgCount => ArgCount,
RegionsDoesNotOutlive(a, b) => {
return tcx.lift(&(a, b)).map(|(a, b)| 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));
return tcx.lift(b).map(|b| RegionsInsufficientlyPolymorphic(a, b));
}
RegionsOverlyPolymorphic(a, b) => {
return tcx.lift(&b).map(|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)),
CyclicTy(t) => return tcx.lift(t).map(|t| CyclicTy(t)),
CyclicConst(ct) => return tcx.lift(ct).map(|ct| CyclicConst(ct)),
ProjectionMismatched(x) => ProjectionMismatched(x),
Sorts(ref x) => return tcx.lift(x).map(Sorts),
ExistentialMismatch(ref x) => return tcx.lift(x).map(ExistentialMismatch),
ConstMismatch(ref x) => return tcx.lift(x).map(ConstMismatch),
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(ref x) => TargetFeatureCast(*x),
ObjectUnsafeCoercion(ref x) => return tcx.lift(x).map(ObjectUnsafeCoercion),
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 {
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, ref ty) => {
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, ref ty) => {
ty::InstanceDef::DropGlue(def_id, ty) => {
Some(ty::InstanceDef::DropGlue(def_id, tcx.lift(ty)?))
}
ty::InstanceDef::CloneShim(def_id, ref ty) => {
ty::InstanceDef::CloneShim(def_id, ty) => {
Some(ty::InstanceDef::CloneShim(def_id, tcx.lift(ty)?))
}
}

8
compiler/rustc_middle/src/ty/subst.rs
View file

@ -141,11 +141,11 @@ impl<'tcx> GenericArg<'tcx> {
impl<'a, 'tcx> Lift<'tcx> for GenericArg<'a> {
type Lifted = GenericArg<'tcx>;
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
match self.unpack() {
GenericArgKind::Lifetime(lt) => tcx.lift(&lt).map(|lt| lt.into()),
GenericArgKind::Type(ty) => tcx.lift(&ty).map(|ty| ty.into()),
GenericArgKind::Const(ct) => tcx.lift(&ct).map(|ct| ct.into()),
GenericArgKind::Lifetime(lt) => tcx.lift(lt).map(|lt| lt.into()),
GenericArgKind::Type(ty) => tcx.lift(ty).map(|ty| ty.into()),
GenericArgKind::Const(ct) => tcx.lift(ct).map(|ct| ct.into()),
}
}
}