-use errors::DiagnosticBuilder;
+use rustc_errors::DiagnosticBuilder;
use rustc_span::Span;
use smallvec::SmallVec;
-use crate::hir;
-use crate::hir::def_id::DefId;
use crate::ty::outlives::Component;
use crate::ty::subst::{GenericArg, Subst, SubstsRef};
use crate::ty::{self, ToPolyTraitRef, ToPredicate, Ty, TyCtxt};
-use crate::util::nodemap::FxHashSet;
+use rustc_data_structures::fx::FxHashSet;
+use rustc_hir as hir;
+use rustc_hir::def_id::DefId;
use super::{Normalized, Obligation, ObligationCause, PredicateObligation, SelectionContext};
Obligation { cause, param_env, recursion_depth, predicate: trait_ref.to_predicate() }
}
-impl<'tcx> TyCtxt<'tcx> {
- pub fn predicate_for_trait_def(
- self,
- param_env: ty::ParamEnv<'tcx>,
- cause: ObligationCause<'tcx>,
- trait_def_id: DefId,
- recursion_depth: usize,
- self_ty: Ty<'tcx>,
- params: &[GenericArg<'tcx>],
- ) -> PredicateObligation<'tcx> {
- let trait_ref =
- ty::TraitRef { def_id: trait_def_id, substs: self.mk_substs_trait(self_ty, params) };
- predicate_for_trait_ref(cause, param_env, trait_ref, recursion_depth)
- }
-
- /// Casts a trait reference into a reference to one of its super
- /// traits; returns `None` if `target_trait_def_id` is not a
- /// supertrait.
- pub fn upcast_choices(
- self,
- source_trait_ref: ty::PolyTraitRef<'tcx>,
- target_trait_def_id: DefId,
- ) -> Vec<ty::PolyTraitRef<'tcx>> {
- if source_trait_ref.def_id() == target_trait_def_id {
- return vec![source_trait_ref]; // Shortcut the most common case.
- }
+pub fn predicate_for_trait_def(
+ tcx: TyCtxt<'tcx>,
+ param_env: ty::ParamEnv<'tcx>,
+ cause: ObligationCause<'tcx>,
+ trait_def_id: DefId,
+ recursion_depth: usize,
+ self_ty: Ty<'tcx>,
+ params: &[GenericArg<'tcx>],
+) -> PredicateObligation<'tcx> {
+ let trait_ref =
+ ty::TraitRef { def_id: trait_def_id, substs: tcx.mk_substs_trait(self_ty, params) };
+ predicate_for_trait_ref(cause, param_env, trait_ref, recursion_depth)
+}
- supertraits(self, source_trait_ref).filter(|r| r.def_id() == target_trait_def_id).collect()
+/// Casts a trait reference into a reference to one of its super
+/// traits; returns `None` if `target_trait_def_id` is not a
+/// supertrait.
+pub fn upcast_choices(
+ tcx: TyCtxt<'tcx>,
+ source_trait_ref: ty::PolyTraitRef<'tcx>,
+ target_trait_def_id: DefId,
+) -> Vec<ty::PolyTraitRef<'tcx>> {
+ if source_trait_ref.def_id() == target_trait_def_id {
+ return vec![source_trait_ref]; // Shortcut the most common case.
}
- /// Given a trait `trait_ref`, returns the number of vtable entries
- /// that come from `trait_ref`, excluding its supertraits. Used in
- /// computing the vtable base for an upcast trait of a trait object.
- pub fn count_own_vtable_entries(self, trait_ref: ty::PolyTraitRef<'tcx>) -> usize {
- let mut entries = 0;
- // Count number of methods and add them to the total offset.
- // Skip over associated types and constants.
- for trait_item in self.associated_items(trait_ref.def_id()) {
- if trait_item.kind == ty::AssocKind::Method {
- entries += 1;
- }
+ supertraits(tcx, source_trait_ref).filter(|r| r.def_id() == target_trait_def_id).collect()
+}
+
+/// Given a trait `trait_ref`, returns the number of vtable entries
+/// that come from `trait_ref`, excluding its supertraits. Used in
+/// computing the vtable base for an upcast trait of a trait object.
+pub fn count_own_vtable_entries(tcx: TyCtxt<'tcx>, trait_ref: ty::PolyTraitRef<'tcx>) -> usize {
+ let mut entries = 0;
+ // Count number of methods and add them to the total offset.
+ // Skip over associated types and constants.
+ for trait_item in tcx.associated_items(trait_ref.def_id()) {
+ if trait_item.kind == ty::AssocKind::Method {
+ entries += 1;
}
- entries
}
+ entries
+}
- /// Given an upcast trait object described by `object`, returns the
- /// index of the method `method_def_id` (which should be part of
- /// `object.upcast_trait_ref`) within the vtable for `object`.
- pub fn get_vtable_index_of_object_method<N>(
- self,
- object: &super::VtableObjectData<'tcx, N>,
- method_def_id: DefId,
- ) -> usize {
- // Count number of methods preceding the one we are selecting and
- // add them to the total offset.
- // Skip over associated types and constants.
- let mut entries = object.vtable_base;
- for trait_item in self.associated_items(object.upcast_trait_ref.def_id()) {
- if trait_item.def_id == method_def_id {
- // The item with the ID we were given really ought to be a method.
- assert_eq!(trait_item.kind, ty::AssocKind::Method);
- return entries;
- }
- if trait_item.kind == ty::AssocKind::Method {
- entries += 1;
- }
+/// Given an upcast trait object described by `object`, returns the
+/// index of the method `method_def_id` (which should be part of
+/// `object.upcast_trait_ref`) within the vtable for `object`.
+pub fn get_vtable_index_of_object_method<N>(
+ tcx: TyCtxt<'tcx>,
+ object: &super::VtableObjectData<'tcx, N>,
+ method_def_id: DefId,
+) -> usize {
+ // Count number of methods preceding the one we are selecting and
+ // add them to the total offset.
+ // Skip over associated types and constants.
+ let mut entries = object.vtable_base;
+ for trait_item in tcx.associated_items(object.upcast_trait_ref.def_id()) {
+ if trait_item.def_id == method_def_id {
+ // The item with the ID we were given really ought to be a method.
+ assert_eq!(trait_item.kind, ty::AssocKind::Method);
+ return entries;
+ }
+ if trait_item.kind == ty::AssocKind::Method {
+ entries += 1;
}
-
- bug!("get_vtable_index_of_object_method: {:?} was not found", method_def_id);
}
- pub fn closure_trait_ref_and_return_type(
- self,
- fn_trait_def_id: DefId,
- self_ty: Ty<'tcx>,
- sig: ty::PolyFnSig<'tcx>,
- tuple_arguments: TupleArgumentsFlag,
- ) -> ty::Binder<(ty::TraitRef<'tcx>, Ty<'tcx>)> {
- let arguments_tuple = match tuple_arguments {
- TupleArgumentsFlag::No => sig.skip_binder().inputs()[0],
- TupleArgumentsFlag::Yes => self.intern_tup(sig.skip_binder().inputs()),
- };
- let trait_ref = ty::TraitRef {
- def_id: fn_trait_def_id,
- substs: self.mk_substs_trait(self_ty, &[arguments_tuple.into()]),
- };
- ty::Binder::bind((trait_ref, sig.skip_binder().output()))
- }
+ bug!("get_vtable_index_of_object_method: {:?} was not found", method_def_id);
+}
- pub fn generator_trait_ref_and_outputs(
- self,
- fn_trait_def_id: DefId,
- self_ty: Ty<'tcx>,
- sig: ty::PolyGenSig<'tcx>,
- ) -> ty::Binder<(ty::TraitRef<'tcx>, Ty<'tcx>, Ty<'tcx>)> {
- let trait_ref =
- ty::TraitRef { def_id: fn_trait_def_id, substs: self.mk_substs_trait(self_ty, &[]) };
- ty::Binder::bind((trait_ref, sig.skip_binder().yield_ty, sig.skip_binder().return_ty))
- }
+pub fn closure_trait_ref_and_return_type(
+ tcx: TyCtxt<'tcx>,
+ fn_trait_def_id: DefId,
+ self_ty: Ty<'tcx>,
+ sig: ty::PolyFnSig<'tcx>,
+ tuple_arguments: TupleArgumentsFlag,
+) -> ty::Binder<(ty::TraitRef<'tcx>, Ty<'tcx>)> {
+ let arguments_tuple = match tuple_arguments {
+ TupleArgumentsFlag::No => sig.skip_binder().inputs()[0],
+ TupleArgumentsFlag::Yes => tcx.intern_tup(sig.skip_binder().inputs()),
+ };
+ let trait_ref = ty::TraitRef {
+ def_id: fn_trait_def_id,
+ substs: tcx.mk_substs_trait(self_ty, &[arguments_tuple.into()]),
+ };
+ ty::Binder::bind((trait_ref, sig.skip_binder().output()))
+}
- pub fn impl_is_default(self, node_item_def_id: DefId) -> bool {
- match self.hir().as_local_hir_id(node_item_def_id) {
- Some(hir_id) => {
- let item = self.hir().expect_item(hir_id);
- if let hir::ItemKind::Impl(_, _, defaultness, ..) = item.kind {
- defaultness.is_default()
- } else {
- false
- }
+pub fn generator_trait_ref_and_outputs(
+ tcx: TyCtxt<'tcx>,
+ fn_trait_def_id: DefId,
+ self_ty: Ty<'tcx>,
+ sig: ty::PolyGenSig<'tcx>,
+) -> ty::Binder<(ty::TraitRef<'tcx>, Ty<'tcx>, Ty<'tcx>)> {
+ let trait_ref =
+ ty::TraitRef { def_id: fn_trait_def_id, substs: tcx.mk_substs_trait(self_ty, &[]) };
+ ty::Binder::bind((trait_ref, sig.skip_binder().yield_ty, sig.skip_binder().return_ty))
+}
+
+pub fn impl_is_default(tcx: TyCtxt<'_>, node_item_def_id: DefId) -> bool {
+ match tcx.hir().as_local_hir_id(node_item_def_id) {
+ Some(hir_id) => {
+ let item = tcx.hir().expect_item(hir_id);
+ if let hir::ItemKind::Impl(_, _, defaultness, ..) = item.kind {
+ defaultness.is_default()
+ } else {
+ false
}
- None => self.impl_defaultness(node_item_def_id).is_default(),
}
+ None => tcx.impl_defaultness(node_item_def_id).is_default(),
}
+}
- pub fn impl_item_is_final(self, assoc_item: &ty::AssocItem) -> bool {
- assoc_item.defaultness.is_final() && !self.impl_is_default(assoc_item.container.id())
- }
+pub fn impl_item_is_final(tcx: TyCtxt<'_>, assoc_item: &ty::AssocItem) -> bool {
+ assoc_item.defaultness.is_final() && !impl_is_default(tcx, assoc_item.container.id())
}
pub enum TupleArgumentsFlag {
projects / rust.git / blobdiff