bjoernager/rust
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Have the spans of TAIT type conflict errors point to the actual site instead of the owning function

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This commit is contained in:
Oli Scherer 2022-02-09 16:44:17 +00:00
parent 4b249b062b
commit d5b6510bfb
37 changed files with 180 additions and 187 deletions
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8
compiler/rustc_borrowck/src/nll.rs
View file

@ -8,7 +8,7 @@ use rustc_middle::mir::{
BasicBlock, Body, ClosureOutlivesSubject, ClosureRegionRequirements, LocalKind, Location,
Promoted,
};
use rustc_middle::ty::{self, OpaqueTypeKey, Region, RegionVid, Ty};
use rustc_middle::ty::{self, OpaqueHiddenType, OpaqueTypeKey, Region, RegionVid};
use rustc_span::symbol::sym;
use std::env;
use std::fmt::Debug;
@ -43,7 +43,7 @@ pub type PoloniusOutput = Output<RustcFacts>;
/// closure requirements to propagate, and any generated errors.
crate struct NllOutput<'tcx> {
pub regioncx: RegionInferenceContext<'tcx>,
pub opaque_type_values: VecMap<OpaqueTypeKey<'tcx>, Ty<'tcx>>,
pub opaque_type_values: VecMap<OpaqueTypeKey<'tcx>, OpaqueHiddenType<'tcx>>,
pub polonius_input: Option<Box<AllFacts>>,
pub polonius_output: Option<Rc<PoloniusOutput>>,
pub opt_closure_req: Option<ClosureRegionRequirements<'tcx>>,
@ -305,7 +305,7 @@ pub(crate) fn compute_regions<'cx, 'tcx>(
infcx.set_tainted_by_errors();
}
let remapped_opaque_tys = regioncx.infer_opaque_types(&infcx, opaque_type_values, body.span);
let remapped_opaque_tys = regioncx.infer_opaque_types(&infcx, opaque_type_values);
NllOutput {
regioncx,
@ -372,7 +372,7 @@ pub(super) fn dump_annotation<'a, 'tcx>(
body: &Body<'tcx>,
regioncx: &RegionInferenceContext<'tcx>,
closure_region_requirements: &Option<ClosureRegionRequirements<'_>>,
opaque_type_values: &VecMap<OpaqueTypeKey<'tcx>, Ty<'tcx>>,
opaque_type_values: &VecMap<OpaqueTypeKey<'tcx>, OpaqueHiddenType<'tcx>>,
errors: &mut crate::error::BorrowckErrors<'tcx>,
) {
let tcx = infcx.tcx;

32
compiler/rustc_borrowck/src/region_infer/opaque_types.rs
View file

@ -3,7 +3,7 @@ use rustc_data_structures::vec_map::VecMap;
use rustc_hir::OpaqueTyOrigin;
use rustc_infer::infer::InferCtxt;
use rustc_middle::ty::subst::GenericArgKind;
use rustc_middle::ty::{self, OpaqueTypeKey, Ty, TyCtxt, TypeFoldable};
use rustc_middle::ty::{self, OpaqueHiddenType, OpaqueTypeKey, TyCtxt, TypeFoldable};
use rustc_span::Span;
use rustc_trait_selection::opaque_types::InferCtxtExt;
@ -53,15 +53,12 @@ impl<'tcx> RegionInferenceContext<'tcx> {
pub(crate) fn infer_opaque_types(
&self,
infcx: &InferCtxt<'_, 'tcx>,
opaque_ty_decls: VecMap<OpaqueTypeKey<'tcx>, (Ty<'tcx>, Span, OpaqueTyOrigin)>,
span: Span,
) -> VecMap<OpaqueTypeKey<'tcx>, Ty<'tcx>> {
opaque_ty_decls: VecMap<OpaqueTypeKey<'tcx>, (OpaqueHiddenType<'tcx>, OpaqueTyOrigin)>,
) -> VecMap<OpaqueTypeKey<'tcx>, OpaqueHiddenType<'tcx>> {
opaque_ty_decls
.into_iter()
.map(|(opaque_type_key, (concrete_type, decl_span, origin))| {
.map(|(opaque_type_key, (concrete_type, origin))| {
let substs = opaque_type_key.substs;
// FIXME: why are the spans in decl_span often DUMMY_SP?
let span = decl_span.substitute_dummy(span);
debug!(?concrete_type, ?substs);
let mut subst_regions = vec![self.universal_regions.fr_static];
@ -85,7 +82,7 @@ impl<'tcx> RegionInferenceContext<'tcx> {
None => {
subst_regions.push(vid);
infcx.tcx.sess.delay_span_bug(
span,
concrete_type.span,
"opaque type with non-universal region substs",
);
infcx.tcx.lifetimes.re_static
@ -113,17 +110,18 @@ impl<'tcx> RegionInferenceContext<'tcx> {
let remapped_type = infcx.infer_opaque_definition_from_instantiation(
opaque_type_key,
universal_concrete_type,
span,
);
(
let ty = if check_opaque_type_parameter_valid(
infcx.tcx,
opaque_type_key,
if check_opaque_type_parameter_valid(infcx.tcx, opaque_type_key, origin, span) {
remapped_type
} else {
infcx.tcx.ty_error()
},
)
origin,
concrete_type.span,
) {
remapped_type
} else {
infcx.tcx.ty_error()
};
(opaque_type_key, OpaqueHiddenType { ty, span: concrete_type.span })
})
.collect()
}

16
compiler/rustc_borrowck/src/type_check/mod.rs
View file

@ -31,8 +31,8 @@ use rustc_middle::ty::cast::CastTy;
use rustc_middle::ty::fold::TypeFoldable;
use rustc_middle::ty::subst::{GenericArgKind, SubstsRef, UserSubsts};
use rustc_middle::ty::{
self, CanonicalUserTypeAnnotation, CanonicalUserTypeAnnotations, OpaqueTypeKey, RegionVid,
ToPredicate, Ty, TyCtxt, UserType, UserTypeAnnotationIndex,
self, CanonicalUserTypeAnnotation, CanonicalUserTypeAnnotations, OpaqueHiddenType,
OpaqueTypeKey, RegionVid, ToPredicate, Ty, TyCtxt, UserType, UserTypeAnnotationIndex,
};
use rustc_span::def_id::CRATE_DEF_ID;
use rustc_span::{Span, DUMMY_SP};
@ -225,21 +225,21 @@ pub(crate) fn type_check<'mir, 'tcx>(
),
)
.unwrap();
let mut hidden_type = infcx.resolve_vars_if_possible(decl.hidden_type.ty);
let mut hidden_type = infcx.resolve_vars_if_possible(decl.hidden_type);
trace!(
"finalized opaque type {:?} to {:#?}",
opaque_type_key,
hidden_type.kind()
hidden_type.ty.kind()
);
if hidden_type.has_infer_types_or_consts() {
infcx.tcx.sess.delay_span_bug(
decl.hidden_type.span,
&format!("could not resolve {:#?}", hidden_type.kind()),
&format!("could not resolve {:#?}", hidden_type.ty.kind()),
);
hidden_type = infcx.tcx.ty_error();
hidden_type.ty = infcx.tcx.ty_error();
}
(opaque_type_key, (hidden_type, decl.hidden_type.span, decl.origin))
(opaque_type_key, (hidden_type, decl.origin))
})
.collect()
},
@ -905,7 +905,7 @@ struct BorrowCheckContext<'a, 'tcx> {
crate struct MirTypeckResults<'tcx> {
crate constraints: MirTypeckRegionConstraints<'tcx>,
crate universal_region_relations: Frozen<UniversalRegionRelations<'tcx>>,
crate opaque_type_values: VecMap<OpaqueTypeKey<'tcx>, (Ty<'tcx>, Span, OpaqueTyOrigin)>,
crate opaque_type_values: VecMap<OpaqueTypeKey<'tcx>, (OpaqueHiddenType<'tcx>, OpaqueTyOrigin)>,
}
/// A collection of region constraints that must be satisfied for the