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Auto merge of #73176 - LeSeulArtichaut:tyctxtat-err, r=eddyb

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Add `TyCtxtAt::{ty_error, ty_error_with_message}`

~~Only e2d957d was added, the rest comes from #70551.~~
I was unsure where to put the implementation for those methods, please tell me if there is a better place for it.

Closes #72619, ~~blocked on #70551~~.

r? @eddyb cc @mark-i-m, maybe this should be part of #70551? If so feel free to cherry-pick or ask me to file a PR against your fork.
This commit is contained in:
bors 2020-08-16 18:48:26 +00:00
commit 9b4db695b0
1 changed files with 19 additions and 3 deletions
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22
src/librustc_middle/ty/context.rs
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@ -13,13 +13,14 @@ use crate::middle::stability;
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,
};
@ -2615,6 +2616,21 @@ impl<'tcx> TyCtxt<'tcx> {
}
}
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