rust-lang/rust
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Fully fledged Clause type

Browse Source
This commit is contained in:
Michael Goulet
2023-06-16 06:27:41 +00:00
parent fca56a8d2c
commit 21226eefb2
11 changed files with 155 additions and 96 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
compiler/rustc_hir_analysis/src/bounds.rs
View File

@@ -2,7 +2,6 @@
//! `ty` form from the HIR.
use rustc_hir::LangItem;
use rustc_middle::ty::Binder;
use rustc_middle::ty::{self, ToPredicate, Ty, TyCtxt};
use rustc_span::Span;
@@ -24,62 +23,58 @@ use rustc_span::Span;
/// include the self type (e.g., `trait_bounds`) but in others we do not
#[derive(Default, PartialEq, Eq, Clone, Debug)]
pub struct Bounds<'tcx> {
pub predicates: Vec<(Binder<'tcx, ty::ClauseKind<'tcx>>, Span)>,
pub clauses: Vec<(ty::Clause<'tcx>, Span)>,
}
impl<'tcx> Bounds<'tcx> {
pub fn push_region_bound(
&mut self,
_tcx: TyCtxt<'tcx>,
tcx: TyCtxt<'tcx>,
region: ty::PolyTypeOutlivesPredicate<'tcx>,
span: Span,
) {
self.predicates.push((region.map_bound(|p| ty::ClauseKind::TypeOutlives(p)), span));
self.clauses
.push((region.map_bound(|p| ty::ClauseKind::TypeOutlives(p)).to_predicate(tcx), span));
}
pub fn push_trait_bound(
&mut self,
_tcx: TyCtxt<'tcx>,
tcx: TyCtxt<'tcx>,
trait_ref: ty::PolyTraitRef<'tcx>,
span: Span,
constness: ty::BoundConstness,
polarity: ty::ImplPolarity,
) {
self.predicates.push((
trait_ref.map_bound(|trait_ref| {
ty::ClauseKind::Trait(ty::TraitPredicate { trait_ref, constness, polarity })
}),
self.clauses.push((
trait_ref
.map_bound(|trait_ref| {
ty::ClauseKind::Trait(ty::TraitPredicate { trait_ref, constness, polarity })
})
.to_predicate(tcx),
span,
));
}
pub fn push_projection_bound(
&mut self,
_tcx: TyCtxt<'tcx>,
tcx: TyCtxt<'tcx>,
projection: ty::PolyProjectionPredicate<'tcx>,
span: Span,
) {
self.predicates.push((projection.map_bound(|proj| ty::ClauseKind::Projection(proj)), span));
self.clauses.push((
projection.map_bound(|proj| ty::ClauseKind::Projection(proj)).to_predicate(tcx),
span,
));
}
pub fn push_sized(&mut self, tcx: TyCtxt<'tcx>, ty: Ty<'tcx>, span: Span) {
let sized_def_id = tcx.require_lang_item(LangItem::Sized, Some(span));
let trait_ref = ty::TraitRef::new(tcx, sized_def_id, [ty]);
// Preferable to put this obligation first, since we report better errors for sized ambiguity.
self.predicates.insert(
0,
(
ty::Binder::dummy(ty::ClauseKind::Trait(
trait_ref.without_const().to_predicate(tcx),
)),
span,
),
);
self.clauses.insert(0, (trait_ref.to_predicate(tcx), span));
}
pub fn predicates(
&self,
) -> impl Iterator<Item = (Binder<'tcx, ty::ClauseKind<'tcx>>, Span)> + '_ {
self.predicates.iter().cloned()
pub fn clauses(&self) -> impl Iterator<Item = (ty::Clause<'tcx>, Span)> + '_ {
self.clauses.iter().cloned()
}
}