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Separate `PlaceCtxt` from `UsefulnessCtxt`

This commit is contained in:
Nadrieril 2024-01-24 21:51:17 +01:00
parent 6ef836246b
commit 59031429c5
1 changed files with 8 additions and 8 deletions
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16
compiler/rustc_pattern_analysis/src/usefulness.rs
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@ -745,7 +745,7 @@ impl<'a, Cx: TypeCx> Clone for UsefulnessCtxt<'a, Cx> {
/// Context that provides information local to a place under investigation.
struct PlaceCtxt<'a, Cx: TypeCx> {
mcx: UsefulnessCtxt<'a, Cx>,
cx: &'a Cx,
/// Type of the place under investigation.
ty: &'a Cx::Ty,
}
@ -753,7 +753,7 @@ struct PlaceCtxt<'a, Cx: TypeCx> {
impl<'a, Cx: TypeCx> Copy for PlaceCtxt<'a, Cx> {}
impl<'a, Cx: TypeCx> Clone for PlaceCtxt<'a, Cx> {
fn clone(&self) -> Self {
Self { mcx: self.mcx, ty: self.ty }
Self { cx: self.cx, ty: self.ty }
}
}
@ -765,19 +765,19 @@ impl<'a, Cx: TypeCx> fmt::Debug for PlaceCtxt<'a, Cx> {
impl<'a, Cx: TypeCx> PlaceCtxt<'a, Cx> {
fn ctor_arity(&self, ctor: &Constructor<Cx>) -> usize {
self.mcx.tycx.ctor_arity(ctor, self.ty)
self.cx.ctor_arity(ctor, self.ty)
}
fn ctor_sub_tys(
&'a self,
ctor: &'a Constructor<Cx>,
) -> impl Iterator<Item = Cx::Ty> + ExactSizeIterator + Captures<'a> {
self.mcx.tycx.ctor_sub_tys(ctor, self.ty)
self.cx.ctor_sub_tys(ctor, self.ty)
}
fn ctors_for_ty(&self) -> Result<ConstructorSet<Cx>, Cx::Error> {
self.mcx.tycx.ctors_for_ty(self.ty)
self.cx.ctors_for_ty(self.ty)
}
fn wild_from_ctor(&self, ctor: Constructor<Cx>) -> WitnessPat<Cx> {
WitnessPat::wild_from_ctor(self.mcx.tycx, ctor, self.ty.clone())
WitnessPat::wild_from_ctor(self.cx, ctor, self.ty.clone())
}
}
@ -1098,7 +1098,7 @@ impl<'p, Cx: TypeCx> Matrix<'p, Cx> {
wildcard_row_is_relevant: self.wildcard_row_is_relevant && ctor_is_relevant,
};
for (i, row) in self.rows().enumerate() {
if ctor.is_covered_by(pcx.mcx.tycx, row.head().ctor()) {
if ctor.is_covered_by(pcx.cx, row.head().ctor()) {
let new_row = row.pop_head_constructor(ctor, arity, ctor_is_relevant, i);
matrix.expand_and_push(new_row);
}
@ -1478,7 +1478,7 @@ fn compute_exhaustiveness_and_usefulness<'a, 'p, Cx: TypeCx>(
};
debug!("ty: {ty:?}");
let pcx = &PlaceCtxt { mcx, ty: &ty };
let pcx = &PlaceCtxt { cx: mcx.tycx, ty: &ty };
let ctors_for_ty = pcx.ctors_for_ty()?;
// Whether the place/column we are inspecting is known to contain valid data.