//! Type context book-keeping.
use crate::arena::Arena;
-use crate::dep_graph::DepGraph;
-use crate::dep_graph::{self, DepConstructor};
+use crate::dep_graph::{self, DepConstructor, DepGraph};
use crate::hir::exports::Export;
use crate::ich::{NodeIdHashingMode, StableHashingContext};
use crate::infer::canonical::{Canonical, CanonicalVarInfo, CanonicalVarInfos};
-use crate::lint::LintDiagnosticBuilder;
-use crate::lint::{struct_lint_level, LintSource};
+use crate::lint::{struct_lint_level, LintDiagnosticBuilder, LintSource};
use crate::middle;
-use crate::middle::cstore::CrateStoreDyn;
-use crate::middle::cstore::EncodedMetadata;
+use crate::middle::cstore::{CrateStoreDyn, EncodedMetadata};
use crate::middle::resolve_lifetime::{self, ObjectLifetimeDefault};
use crate::middle::stability;
-use crate::mir::interpret::{Allocation, ConstValue, Scalar};
-use crate::mir::{interpret, Body, Field, Local, Place, PlaceElem, ProjectionKind, Promoted};
+use crate::mir::interpret::{self, Allocation, ConstValue, Scalar};
+use crate::mir::{Body, Field, Local, Place, PlaceElem, ProjectionKind, Promoted};
use crate::traits;
-use crate::ty::query;
use crate::ty::steal::Steal;
-use crate::ty::subst::{GenericArg, InternalSubsts, Subst, SubstsRef};
-use crate::ty::subst::{GenericArgKind, UserSubsts};
-use crate::ty::CanonicalPolyFnSig;
-use crate::ty::GenericParamDefKind;
-use crate::ty::RegionKind;
-use crate::ty::ReprOptions;
+use crate::ty::subst::{GenericArg, GenericArgKind, InternalSubsts, Subst, SubstsRef, UserSubsts};
use crate::ty::TyKind::*;
-use crate::ty::{self, DefIdTree, Ty, TypeAndMut};
-use crate::ty::{AdtDef, AdtKind, Const, Region};
-use crate::ty::{BindingMode, BoundVar};
-use crate::ty::{ConstVid, FloatVar, FloatVid, IntVar, IntVid, TyVar, TyVid};
-use crate::ty::{ExistentialPredicate, Predicate, PredicateKind};
-use crate::ty::{InferConst, ParamConst};
-use crate::ty::{InferTy, ParamTy, PolyFnSig, ProjectionTy};
-use crate::ty::{List, TyKind, TyS};
+use crate::ty::{
+ self, query, AdtDef, AdtKind, BindingMode, BoundVar, CanonicalPolyFnSig, Const, ConstVid,
+ DefIdTree, ExistentialPredicate, FloatVar, FloatVid, GenericParamDefKind, InferConst, InferTy,
+ IntVar, IntVid, List, ParamConst, ParamTy, PolyFnSig, Predicate, PredicateKind, ProjectionTy,
+ Region, RegionKind, ReprOptions, TraitObjectVisitor, Ty, TyKind, TyS, TyVar, TyVid, TypeAndMut,
+};
use rustc_ast::ast;
use rustc_ast::expand::allocator::AllocatorKind;
use rustc_attr as attr;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::def_id::{CrateNum, DefId, DefIdMap, DefIdSet, LocalDefId, LOCAL_CRATE};
use rustc_hir::definitions::{DefPathHash, Definitions};
-use rustc_hir::lang_items;
-use rustc_hir::lang_items::PanicLocationLangItem;
-use rustc_hir::{HirId, Node, TraitCandidate};
-use rustc_hir::{ItemKind, ItemLocalId, ItemLocalMap, ItemLocalSet};
+use rustc_hir::lang_items::{self, PanicLocationLangItem};
+use rustc_hir::{HirId, ItemKind, ItemLocalId, ItemLocalMap, ItemLocalSet, Node, TraitCandidate};
use rustc_index::vec::{Idx, IndexVec};
use rustc_macros::HashStable;
use rustc_session::config::{BorrowckMode, CrateType, OutputFilenames};
/// The upvarID contains the HIR node ID and it also contains the full path
/// leading to the member of the struct or tuple that is used instead of the
/// entire variable.
- pub upvar_list: ty::UpvarListMap,
+ pub closure_captures: ty::UpvarListMap,
/// Stores the type, expression, span and optional scope span of all types
/// that are live across the yield of this generator (if a generator).
used_trait_imports: Lrc::new(Default::default()),
tainted_by_errors: None,
concrete_opaque_types: Default::default(),
- upvar_list: Default::default(),
+ closure_captures: Default::default(),
generator_interior_types: Default::default(),
}
}
ref used_trait_imports,
tainted_by_errors,
ref concrete_opaque_types,
- ref upvar_list,
+ ref closure_captures,
ref generator_interior_types,
} = *self;
used_trait_imports.hash_stable(hcx, hasher);
tainted_by_errors.hash_stable(hcx, hasher);
concrete_opaque_types.hash_stable(hcx, hasher);
- upvar_list.hash_stable(hcx, hasher);
+ closure_captures.hash_stable(hcx, hasher);
generator_interior_types.hash_stable(hcx, hasher);
})
}
})
}
+ pub fn return_type_impl_or_dyn_trait(&self, scope_def_id: DefId) -> Option<(Span, bool)> {
+ let hir_id = self.hir().as_local_hir_id(scope_def_id.expect_local());
+ let hir_output = match self.hir().get(hir_id) {
+ Node::Item(hir::Item {
+ kind:
+ ItemKind::Fn(
+ hir::FnSig {
+ decl: hir::FnDecl { output: hir::FnRetTy::Return(ty), .. },
+ ..
+ },
+ ..,
+ ),
+ ..
+ })
+ | Node::ImplItem(hir::ImplItem {
+ kind:
+ hir::ImplItemKind::Fn(
+ hir::FnSig {
+ decl: hir::FnDecl { output: hir::FnRetTy::Return(ty), .. },
+ ..
+ },
+ _,
+ ),
+ ..
+ })
+ | Node::TraitItem(hir::TraitItem {
+ kind:
+ hir::TraitItemKind::Fn(
+ hir::FnSig {
+ decl: hir::FnDecl { output: hir::FnRetTy::Return(ty), .. },
+ ..
+ },
+ _,
+ ),
+ ..
+ }) => ty,
+ _ => return None,
+ };
+
+ let ret_ty = self.type_of(scope_def_id);
+ match ret_ty.kind {
+ ty::FnDef(_, _) => {
+ let sig = ret_ty.fn_sig(*self);
+ let output = self.erase_late_bound_regions(&sig.output());
+ if output.is_impl_trait() {
+ let fn_decl = self.hir().fn_decl_by_hir_id(hir_id).unwrap();
+ Some((fn_decl.output.span(), false))
+ } else {
+ let mut v = TraitObjectVisitor(vec![]);
+ rustc_hir::intravisit::walk_ty(&mut v, hir_output);
+ if v.0.len() == 1 {
+ return Some((v.0[0], true));
+ }
+ None
+ }
+ }
+ _ => None,
+ }
+ }
+
pub fn return_type_impl_trait(&self, scope_def_id: DefId) -> Option<(Ty<'tcx>, Span)> {
// HACK: `type_of_def_id()` will fail on these (#55796), so return `None`.
let hir_id = self.hir().as_local_hir_id(scope_def_id.expect_local());
if self.features().never_type_fallback { self.types.never } else { self.types.unit }
}
- #[inline]
- pub fn mk_bool(self) -> Ty<'tcx> {
- self.mk_ty(Bool)
- }
-
#[inline]
pub fn mk_fn_def(self, def_id: DefId, substs: SubstsRef<'tcx>) -> Ty<'tcx> {
self.mk_ty(FnDef(def_id, substs))
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