bjoernager/rust
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Intern CanonicalVarValues

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This commit is contained in:
Michael Goulet 2023-01-25 18:04:57 +00:00
parent c62665e09c
commit 4ff674f942
7 changed files with 73 additions and 81 deletions
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40
compiler/rustc_trait_selection/src/solve/mod.rs
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@ -13,8 +13,6 @@
// preserves universes and creates a unique var (in the highest universe) for each
// appearance of a region.
// FIXME: `CanonicalVarValues` should be interned and `Copy`.
// FIXME: uses of `infcx.at` need to enable deferred projection equality once that's implemented.
use std::mem;
@ -227,7 +225,7 @@ impl<'a, 'tcx> EvalCtxt<'a, 'tcx> {
let external_constraints = take_external_constraints(self.infcx)?;
Ok(self.infcx.canonicalize_response(Response {
var_values: self.var_values.clone(),
var_values: self.var_values,
external_constraints,
certainty,
}))
@ -483,26 +481,24 @@ pub(super) fn response_no_constraints<'tcx>(
goal: Canonical<'tcx, impl Sized>,
certainty: Certainty,
) -> QueryResult<'tcx> {
let var_values = goal
.variables
.iter()
.enumerate()
.map(|(i, info)| match info.kind {
CanonicalVarKind::Ty(_) | CanonicalVarKind::PlaceholderTy(_) => {
tcx.mk_ty(ty::Bound(ty::INNERMOST, ty::BoundVar::from_usize(i).into())).into()
let var_values =
tcx.mk_substs(goal.variables.iter().enumerate().map(|(i, info)| -> ty::GenericArg<'tcx> {
match info.kind {
CanonicalVarKind::Ty(_) | CanonicalVarKind::PlaceholderTy(_) => {
tcx.mk_ty(ty::Bound(ty::INNERMOST, ty::BoundVar::from_usize(i).into())).into()
}
CanonicalVarKind::Region(_) | CanonicalVarKind::PlaceholderRegion(_) => {
let br = ty::BoundRegion {
var: ty::BoundVar::from_usize(i),
kind: ty::BrAnon(i as u32, None),
};
tcx.mk_region(ty::ReLateBound(ty::INNERMOST, br)).into()
}
CanonicalVarKind::Const(_, ty) | CanonicalVarKind::PlaceholderConst(_, ty) => tcx
.mk_const(ty::ConstKind::Bound(ty::INNERMOST, ty::BoundVar::from_usize(i)), ty)
.into(),
}
CanonicalVarKind::Region(_) | CanonicalVarKind::PlaceholderRegion(_) => {
let br = ty::BoundRegion {
var: ty::BoundVar::from_usize(i),
kind: ty::BrAnon(i as u32, None),
};
tcx.mk_region(ty::ReLateBound(ty::INNERMOST, br)).into()
}
CanonicalVarKind::Const(_, ty) | CanonicalVarKind::PlaceholderConst(_, ty) => tcx
.mk_const(ty::ConstKind::Bound(ty::INNERMOST, ty::BoundVar::from_usize(i)), ty)
.into(),
})
.collect();
}));
Ok(Canonical {
max_universe: goal.max_universe,