bjoernager/rust
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erase region in ParamEnvAnd and make ConstUnifyCtxt private

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This commit is contained in:
b-naber 2022-03-22 16:13:28 +01:00
parent fe69a5cf0c
commit 11a70dbc8a
3 changed files with 12 additions and 13 deletions
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12
compiler/rustc_trait_selection/src/traits/const_evaluatable.rs
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@ -195,7 +195,7 @@ fn satisfied_from_param_env<'tcx>(
match pred.kind().skip_binder() {
ty::PredicateKind::ConstEvaluatable(uv) => {
if let Some(b_ct) = AbstractConst::new(tcx, uv)? {
let const_unify_ctxt = ConstUnifyCtxt::new(tcx, param_env);
let const_unify_ctxt = ConstUnifyCtxt { tcx, param_env };
// Try to unify with each subtree in the AbstractConst to allow for
// `N + 1` being const evaluatable even if theres only a `ConstEvaluatable`
@ -579,7 +579,7 @@ pub(super) fn try_unify_abstract_consts<'tcx>(
(|| {
if let Some(a) = AbstractConst::new(tcx, a)? {
if let Some(b) = AbstractConst::new(tcx, b)? {
let const_unify_ctxt = ConstUnifyCtxt::new(tcx, param_env);
let const_unify_ctxt = ConstUnifyCtxt { tcx, param_env };
return Ok(const_unify_ctxt.try_unify(a, b));
}
}
@ -625,22 +625,18 @@ where
recurse(tcx, ct, &mut f)
}
pub(super) struct ConstUnifyCtxt<'tcx> {
struct ConstUnifyCtxt<'tcx> {
tcx: TyCtxt<'tcx>,
param_env: ty::ParamEnv<'tcx>,
}
impl<'tcx> ConstUnifyCtxt<'tcx> {
pub(super) fn new(tcx: TyCtxt<'tcx>, param_env: ty::ParamEnv<'tcx>) -> Self {
ConstUnifyCtxt { tcx, param_env }
}
// Substitutes generics repeatedly to allow AbstractConsts to unify where a
// ConstKind::Unevalated could be turned into an AbstractConst that would unify e.g.
// Param(N) should unify with Param(T), substs: [Unevaluated("T2", [Unevaluated("T3", [Param(N)])])]
#[inline]
#[instrument(skip(self), level = "debug")]
pub(super) fn try_replace_substs_in_root(
fn try_replace_substs_in_root(
&self,
mut abstr_const: AbstractConst<'tcx>,
) -> Option<AbstractConst<'tcx>> {