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::{self, TyCtxtAt};
use crate::ty::steal::Steal;
use crate::ty::subst::{GenericArg, GenericArgKind, InternalSubsts, Subst, SubstsRef, UserSubsts};
use crate::ty::TyKind::*;
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, PredicateInner, PredicateKind,
+ self, AdtDef, AdtKind, BindingMode, BoundVar, CanonicalPolyFnSig, Const, ConstVid, DefIdTree,
+ ExistentialPredicate, FloatVar, FloatVid, GenericParamDefKind, InferConst, InferTy, IntVar,
+ IntVid, List, ParamConst, ParamTy, PolyFnSig, Predicate, PredicateInner, PredicateKind,
ProjectionTy, Region, RegionKind, ReprOptions, TraitObjectVisitor, Ty, TyKind, TyS, TyVar,
TyVid, TypeAndMut,
};
use std::ops::{Bound, Deref};
use std::sync::Arc;
+ /// A type that is not publicly constructable. This prevents people from making `TyKind::Error`
+ /// except through `tcx.err*()`, which are in this module.
+ #[derive(Copy, Clone, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
+ #[derive(TyEncodable, TyDecodable, HashStable)]
+ pub struct DelaySpanBugEmitted(());
+
type InternedSet<'tcx, T> = ShardedHashMap<Interned<'tcx, T>, ()>;
pub struct CtxtInterners<'tcx> {
#[track_caller]
pub fn ty_error_with_message<S: Into<MultiSpan>>(self, span: S, msg: &str) -> Ty<'tcx> {
self.sess.delay_span_bug(span, msg);
- self.mk_ty(Error(super::sty::DelaySpanBugEmitted(())))
+ self.mk_ty(Error(DelaySpanBugEmitted(())))
}
/// Like `err` but for constants.
pub fn const_error(self, ty: Ty<'tcx>) -> &'tcx Const<'tcx> {
self.sess
.delay_span_bug(DUMMY_SP, "ty::ConstKind::Error constructed but no error reported.");
- self.mk_const(ty::Const {
- val: ty::ConstKind::Error(super::sty::DelaySpanBugEmitted(())),
- ty,
- })
+ self.mk_const(ty::Const { val: ty::ConstKind::Error(DelaySpanBugEmitted(())), ty })
}
pub fn consider_optimizing<T: Fn() -> String>(&self, msg: T) -> bool {
}
}
+impl TyCtxtAt<'tcx> {
+ /// Constructs a `TyKind::Error` type and registers a `delay_span_bug` to ensure it gets used.
+ #[track_caller]
+ pub fn ty_error(self) -> Ty<'tcx> {
+ self.tcx.ty_error_with_message(self.span, "TyKind::Error constructed but no error reported")
+ }
+
+ /// Constructs a `TyKind::Error` type and registers a `delay_span_bug` with the given `msg to
+ /// ensure it gets used.
+ #[track_caller]
+ pub fn ty_error_with_message(self, msg: &str) -> Ty<'tcx> {
+ self.tcx.ty_error_with_message(self.span, msg)
+ }
+}
+
pub trait InternAs<T: ?Sized, R> {
type Output;
fn intern_with<F>(self, f: F) -> Self::Output
pub use self::sty::{BoundRegion, EarlyBoundRegion, FreeRegion, Region};
pub use self::sty::{CanonicalPolyFnSig, FnSig, GenSig, PolyFnSig, PolyGenSig};
pub use self::sty::{ClosureSubsts, GeneratorSubsts, TypeAndMut, UpvarSubsts};
+pub use self::sty::{ClosureSubstsParts, GeneratorSubstsParts};
pub use self::sty::{ConstVid, FloatVid, IntVid, RegionVid, TyVid};
pub use self::sty::{ExistentialPredicate, InferTy, ParamConst, ParamTy, ProjectionTy};
pub use self::sty::{ExistentialProjection, PolyExistentialProjection};
pub use self::context::{tls, FreeRegionInfo, TyCtxt};
pub use self::context::{
- CanonicalUserType, CanonicalUserTypeAnnotation, CanonicalUserTypeAnnotations, ResolvedOpaqueTy,
- UserType, UserTypeAnnotationIndex,
+ CanonicalUserType, CanonicalUserTypeAnnotation, CanonicalUserTypeAnnotations,
+ DelaySpanBugEmitted, ResolvedOpaqueTy, UserType, UserTypeAnnotationIndex,
};
pub use self::context::{
CtxtInterners, GeneratorInteriorTypeCause, GlobalCtxt, Lift, TypeckResults,
use crate::ty::{
self, AdtDef, DefIdTree, Discr, Ty, TyCtxt, TypeFlags, TypeFoldable, WithConstness,
};
- use crate::ty::{List, ParamEnv, TyS};
+ use crate::ty::{DelaySpanBugEmitted, List, ParamEnv, TyS};
use polonius_engine::Atom;
use rustc_ast::ast;
use rustc_data_structures::captures::Captures;
}
}
- /// A type that is not publicly constructable. This prevents people from making `TyKind::Error`
- /// except through `tcx.err*()`.
- #[derive(Copy, Clone, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
- #[derive(TyEncodable, TyDecodable, HashStable)]
- pub struct DelaySpanBugEmitted(pub(super) ());
-
// `TyKind` is used a lot. Make sure it doesn't unintentionally get bigger.
#[cfg(target_arch = "x86_64")]
static_assert_size!(TyKind<'_>, 24);
pub substs: SubstsRef<'tcx>,
}
-/// Struct returned by `split()`. Note that these are subslices of the
-/// parent slice and not canonical substs themselves.
-struct SplitClosureSubsts<'tcx> {
- parent: &'tcx [GenericArg<'tcx>],
- closure_kind_ty: GenericArg<'tcx>,
- closure_sig_as_fn_ptr_ty: GenericArg<'tcx>,
- tupled_upvars_ty: GenericArg<'tcx>,
+/// Struct returned by `split()`.
+pub struct ClosureSubstsParts<'tcx, T> {
+ pub parent_substs: &'tcx [GenericArg<'tcx>],
+ pub closure_kind_ty: T,
+ pub closure_sig_as_fn_ptr_ty: T,
+ pub tupled_upvars_ty: T,
}
impl<'tcx> ClosureSubsts<'tcx> {
- /// Divides the closure substs into their respective
- /// components. Single source of truth with respect to the
- /// ordering.
- fn split(self) -> SplitClosureSubsts<'tcx> {
+ /// Construct `ClosureSubsts` from `ClosureSubstsParts`, containing `Substs`
+ /// for the closure parent, alongside additional closure-specific components.
+ pub fn new(
+ tcx: TyCtxt<'tcx>,
+ parts: ClosureSubstsParts<'tcx, Ty<'tcx>>,
+ ) -> ClosureSubsts<'tcx> {
+ ClosureSubsts {
+ substs: tcx.mk_substs(
+ parts.parent_substs.iter().copied().chain(
+ [parts.closure_kind_ty, parts.closure_sig_as_fn_ptr_ty, parts.tupled_upvars_ty]
+ .iter()
+ .map(|&ty| ty.into()),
+ ),
+ ),
+ }
+ }
+
+ /// Divides the closure substs into their respective components.
+ /// The ordering assumed here must match that used by `ClosureSubsts::new` above.
+ fn split(self) -> ClosureSubstsParts<'tcx, GenericArg<'tcx>> {
match self.substs[..] {
- [ref parent @ .., closure_kind_ty, closure_sig_as_fn_ptr_ty, tupled_upvars_ty] => {
- SplitClosureSubsts {
- parent,
+ [ref parent_substs @ .., closure_kind_ty, closure_sig_as_fn_ptr_ty, tupled_upvars_ty] => {
+ ClosureSubstsParts {
+ parent_substs,
closure_kind_ty,
closure_sig_as_fn_ptr_ty,
tupled_upvars_ty,
/// Returns the substitutions of the closure's parent.
pub fn parent_substs(self) -> &'tcx [GenericArg<'tcx>] {
- self.split().parent
+ self.split().parent_substs
}
#[inline]
pub substs: SubstsRef<'tcx>,
}
-struct SplitGeneratorSubsts<'tcx> {
- parent: &'tcx [GenericArg<'tcx>],
- resume_ty: GenericArg<'tcx>,
- yield_ty: GenericArg<'tcx>,
- return_ty: GenericArg<'tcx>,
- witness: GenericArg<'tcx>,
- tupled_upvars_ty: GenericArg<'tcx>,
+pub struct GeneratorSubstsParts<'tcx, T> {
+ pub parent_substs: &'tcx [GenericArg<'tcx>],
+ pub resume_ty: T,
+ pub yield_ty: T,
+ pub return_ty: T,
+ pub witness: T,
+ pub tupled_upvars_ty: T,
}
impl<'tcx> GeneratorSubsts<'tcx> {
- fn split(self) -> SplitGeneratorSubsts<'tcx> {
+ /// Construct `GeneratorSubsts` from `GeneratorSubstsParts`, containing `Substs`
+ /// for the generator parent, alongside additional generator-specific components.
+ pub fn new(
+ tcx: TyCtxt<'tcx>,
+ parts: GeneratorSubstsParts<'tcx, Ty<'tcx>>,
+ ) -> GeneratorSubsts<'tcx> {
+ GeneratorSubsts {
+ substs: tcx.mk_substs(
+ parts.parent_substs.iter().copied().chain(
+ [
+ parts.resume_ty,
+ parts.yield_ty,
+ parts.return_ty,
+ parts.witness,
+ parts.tupled_upvars_ty,
+ ]
+ .iter()
+ .map(|&ty| ty.into()),
+ ),
+ ),
+ }
+ }
+
+ /// Divides the generator substs into their respective components.
+ /// The ordering assumed here must match that used by `GeneratorSubsts::new` above.
+ fn split(self) -> GeneratorSubstsParts<'tcx, GenericArg<'tcx>> {
match self.substs[..] {
- [ref parent @ .., resume_ty, yield_ty, return_ty, witness, tupled_upvars_ty] => {
- SplitGeneratorSubsts {
- parent,
+ [ref parent_substs @ .., resume_ty, yield_ty, return_ty, witness, tupled_upvars_ty] => {
+ GeneratorSubstsParts {
+ parent_substs,
resume_ty,
yield_ty,
return_ty,
/// Returns the substitutions of the generator's parent.
pub fn parent_substs(self) -> &'tcx [GenericArg<'tcx>] {
- self.split().parent
+ self.split().parent_substs
}
/// This describes the types that can be contained in a generator.
projects / rust.git / commitdiff