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add real folder to Region

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This commit is contained in:
ouz-a 2023-09-28 12:32:15 +03:00
parent da2f897e59
commit bb17fe8bf5
2 changed files with 40 additions and 3 deletions
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2
compiler/rustc_smir/src/rustc_smir/mod.rs
View File

@ -1532,7 +1532,7 @@ impl<'tcx> Stable<'tcx> for ty::RegionKind<'tcx> {
})
}
ty::ReErased => RegionKind::ReErased,
_=> unimplemented!()
_ => unimplemented!(),
}
}
}

41
compiler/stable_mir/src/fold.rs
View File

@ -1,6 +1,9 @@
use std::ops::ControlFlow;
use crate::Opaque;
use crate::{
ty::{self, BoundRegion, BoundRegionKind},
Opaque,
};
use super::ty::{
Allocation, Binder, Const, ConstDef, ConstantKind, ExistentialPredicate, FnSig, GenericArgKind,
@ -15,6 +18,9 @@ pub trait Folder: Sized {
fn fold_const(&mut self, c: &Const) -> ControlFlow<Self::Break, Const> {
c.super_fold(self)
}
fn visit_reg(&mut self, reg: &Region) -> ControlFlow<Self::Break, Region> {
reg.super_fold(self)
}
}
pub trait Foldable: Sized + Clone {
@ -107,8 +113,39 @@ impl Foldable for GenericArgs {
}
impl Foldable for Region {
fn fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> {
folder.visit_reg(self)
}
fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> {
let mut kind = self.kind.clone();
match &mut kind {
crate::ty::RegionKind::ReEarlyBound(_) => {}
crate::ty::RegionKind::ReLateBound(_, bound_reg) => {
*bound_reg = bound_reg.fold(folder)?
}
crate::ty::RegionKind::ReStatic => {}
crate::ty::RegionKind::RePlaceholder(bound_reg) => {
bound_reg.bound = bound_reg.bound.fold(folder)?
}
crate::ty::RegionKind::ReErased => {}
}
ControlFlow::Continue(ty::Region { kind: kind }.into())
}
}
impl Foldable for BoundRegion {
fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> {
ControlFlow::Continue(BoundRegion { var: self.var, kind: self.kind.fold(folder)? })
}
}
impl Foldable for BoundRegionKind {
fn super_fold<V: Folder>(&self, _folder: &mut V) -> ControlFlow<V::Break, Self> {
ControlFlow::Continue(self.clone())
match self {
BoundRegionKind::BrAnon => ControlFlow::Continue(self.clone()),
BoundRegionKind::BrNamed(_, _) => ControlFlow::Continue(self.clone()),
BoundRegionKind::BrEnv => ControlFlow::Continue(self.clone()),
}
}
}