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Diffstat (limited to 'compiler/rustc_hir_analysis/src/bounds.rs')
| -rw-r--r-- | compiler/rustc_hir_analysis/src/bounds.rs | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/compiler/rustc_hir_analysis/src/bounds.rs b/compiler/rustc_hir_analysis/src/bounds.rs deleted file mode 100644 index 9b02651a8bd..00000000000 --- a/compiler/rustc_hir_analysis/src/bounds.rs +++ /dev/null @@ -1,100 +0,0 @@ -//! Bounds are restrictions applied to some types after they've been lowered from the HIR to the -//! [`rustc_middle::ty`] form. - -use rustc_hir::LangItem; -use rustc_middle::ty::{self, Ty, TyCtxt, Upcast}; -use rustc_span::Span; - -/// Collects together a list of type bounds. These lists of bounds occur in many places -/// in Rust's syntax: -/// -/// ```text -/// trait Foo: Bar + Baz { } -/// ^^^^^^^^^ supertrait list bounding the `Self` type parameter -/// -/// fn foo<T: Bar + Baz>() { } -/// ^^^^^^^^^ bounding the type parameter `T` -/// -/// impl dyn Bar + Baz -/// ^^^^^^^^^ bounding the type-erased dynamic type -/// ``` -/// -/// Our representation is a bit mixed here -- in some cases, we -/// include the self type (e.g., `trait_bounds`) but in others we do not -#[derive(Default, PartialEq, Eq, Clone, Debug)] -pub(crate) struct Bounds<'tcx> { - clauses: Vec<(ty::Clause<'tcx>, Span)>, -} - -impl<'tcx> Bounds<'tcx> { - pub(crate) fn push_region_bound( - &mut self, - tcx: TyCtxt<'tcx>, - region: ty::PolyTypeOutlivesPredicate<'tcx>, - span: Span, - ) { - self.clauses - .push((region.map_bound(|p| ty::ClauseKind::TypeOutlives(p)).upcast(tcx), span)); - } - - pub(crate) fn push_trait_bound( - &mut self, - tcx: TyCtxt<'tcx>, - bound_trait_ref: ty::PolyTraitRef<'tcx>, - span: Span, - polarity: ty::PredicatePolarity, - ) { - let clause = ( - bound_trait_ref - .map_bound(|trait_ref| { - ty::ClauseKind::Trait(ty::TraitPredicate { trait_ref, polarity }) - }) - .upcast(tcx), - span, - ); - // FIXME(-Znext-solver): We can likely remove this hack once the new trait solver lands. - if tcx.is_lang_item(bound_trait_ref.def_id(), LangItem::Sized) { - self.clauses.insert(0, clause); - } else { - self.clauses.push(clause); - } - } - - pub(crate) fn push_projection_bound( - &mut self, - tcx: TyCtxt<'tcx>, - projection: ty::PolyProjectionPredicate<'tcx>, - span: Span, - ) { - self.clauses.push(( - projection.map_bound(|proj| ty::ClauseKind::Projection(proj)).upcast(tcx), - span, - )); - } - - pub(crate) 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.clauses.insert(0, (trait_ref.upcast(tcx), span)); - } - - /// Push a `const` or `~const` bound as a `HostEffect` predicate. - pub(crate) fn push_const_bound( - &mut self, - tcx: TyCtxt<'tcx>, - bound_trait_ref: ty::PolyTraitRef<'tcx>, - constness: ty::BoundConstness, - span: Span, - ) { - if tcx.is_const_trait(bound_trait_ref.def_id()) { - self.clauses.push((bound_trait_ref.to_host_effect_clause(tcx, constness), span)); - } else { - tcx.dcx().span_delayed_bug(span, "tried to lower {host:?} bound for non-const trait"); - } - } - - pub(crate) fn clauses(&self) -> impl Iterator<Item = (ty::Clause<'tcx>, Span)> + '_ { - self.clauses.iter().cloned() - } -} |
