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Deduplicate fresh_item_substs

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This commit is contained in:
León Orell Valerian Liehr 2023-02-19 17:21:29 +01:00
parent 6eb6455c46
commit 569ca2bad0
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GPG key ID: D17A07215F68E713
2 changed files with 35 additions and 60 deletions
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65
compiler/rustc_hir_analysis/src/astconv/mod.rs
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@ -2239,7 +2239,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
let ocx = ObligationCtxt::new_in_snapshot(&infcx);
let impl_ty = tcx.type_of(impl_);
let impl_substs = self.fresh_item_substs(impl_, &infcx);
let impl_substs = infcx.fresh_item_substs(impl_);
let impl_ty = impl_ty.subst(tcx, impl_substs);
let impl_ty = ocx.normalize(&cause, param_env, impl_ty);
@ -2306,36 +2306,6 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
))
}
// FIXME(fmease): Copied from `rustc_hir_typeck::method::probe`. Deduplicate.
fn fresh_item_substs(&self, def_id: DefId, infcx: &InferCtxt<'tcx>) -> SubstsRef<'tcx> {
let tcx = self.tcx();
InternalSubsts::for_item(tcx, def_id, |param, _| match param.kind {
GenericParamDefKind::Lifetime => tcx.lifetimes.re_erased.into(),
GenericParamDefKind::Type { .. } => infcx
.next_ty_var(TypeVariableOrigin {
kind: TypeVariableOriginKind::SubstitutionPlaceholder,
span: tcx.def_span(def_id),
})
.into(),
GenericParamDefKind::Const { .. } => {
let span = tcx.def_span(def_id);
let origin = ConstVariableOrigin {
kind: ConstVariableOriginKind::SubstitutionPlaceholder,
span,
};
infcx
.next_const_var(
tcx.type_of(param.def_id)
.no_bound_vars()
.expect("const parameter types cannot be generic"),
origin,
)
.into()
}
})
}
fn lookup_assoc_ty(
&self,
name: Ident,
@ -3531,3 +3501,36 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
}
}
}
pub trait InferCtxtExt<'tcx> {
fn fresh_item_substs(&self, def_id: DefId) -> SubstsRef<'tcx>;
}
impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx> {
fn fresh_item_substs(&self, def_id: DefId) -> SubstsRef<'tcx> {
InternalSubsts::for_item(self.tcx, def_id, |param, _| match param.kind {
GenericParamDefKind::Lifetime => self.tcx.lifetimes.re_erased.into(),
GenericParamDefKind::Type { .. } => self
.next_ty_var(TypeVariableOrigin {
kind: TypeVariableOriginKind::SubstitutionPlaceholder,
span: self.tcx.def_span(def_id),
})
.into(),
GenericParamDefKind::Const { .. } => {
let span = self.tcx.def_span(def_id);
let origin = ConstVariableOrigin {
kind: ConstVariableOriginKind::SubstitutionPlaceholder,
span,
};
self.next_const_var(
self.tcx
.type_of(param.def_id)
.no_bound_vars()
.expect("const parameter types cannot be generic"),
origin,
)
.into()
}
})
}
}