Invert infer error_reporting mod struture

compiler/rustc_borrowck/src/diagnostics/bound_region_errors.rs

@@ -1,7 +1,7 @@
 use rustc_errors::Diag;
 use rustc_hir::def_id::LocalDefId;
+use rustc_infer::error_reporting::infer::nice_region_error::NiceRegionError;
 use rustc_infer::infer::canonical::Canonical;
-use rustc_infer::infer::error_reporting::nice_region_error::NiceRegionError;
 use rustc_infer::infer::region_constraints::Constraint;
 use rustc_infer::infer::region_constraints::RegionConstraintData;
 use rustc_infer::infer::RegionVariableOrigin;

compiler/rustc_borrowck/src/diagnostics/region_errors.rs

@@ -10,11 +10,11 @@ use rustc_hir::GenericBound::Trait;
 use rustc_hir::QPath::Resolved;
 use rustc_hir::WherePredicate::BoundPredicate;
 use rustc_hir::{PolyTraitRef, TyKind, WhereBoundPredicate};
-use rustc_infer::infer::error_reporting::nice_region_error::{
+use rustc_infer::error_reporting::infer::nice_region_error::{
     self, find_anon_type, find_param_with_region, suggest_adding_lifetime_params,
     HirTraitObjectVisitor, NiceRegionError, TraitObjectVisitor,
 };
-use rustc_infer::infer::error_reporting::region::unexpected_hidden_region_diagnostic;
+use rustc_infer::error_reporting::infer::region::unexpected_hidden_region_diagnostic;
 use rustc_infer::infer::{NllRegionVariableOrigin, RelateParamBound};
 use rustc_middle::bug;
 use rustc_middle::hir::place::PlaceBase;

compiler/rustc_hir_analysis/src/check/mod.rs

@@ -82,7 +82,7 @@ use rustc_errors::{pluralize, struct_span_code_err, Diag};
 use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_hir::intravisit::Visitor;
 use rustc_index::bit_set::BitSet;
-use rustc_infer::infer::error_reporting::ObligationCauseExt as _;
+use rustc_infer::error_reporting::infer::ObligationCauseExt as _;
 use rustc_infer::infer::outlives::env::OutlivesEnvironment;
 use rustc_infer::infer::{self, TyCtxtInferExt as _};
 use rustc_infer::traits::ObligationCause;

compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs

@@ -19,7 +19,7 @@ use rustc_hir_analysis::hir_ty_lowering::{
     GenericPathSegment, HirTyLowerer, IsMethodCall, RegionInferReason,
 };
 use rustc_infer::infer::canonical::{Canonical, OriginalQueryValues, QueryResponse};
-use rustc_infer::infer::error_reporting::TypeAnnotationNeeded::E0282;
+use rustc_infer::infer::need_type_info::TypeAnnotationNeeded;
 use rustc_infer::infer::{DefineOpaqueTypes, InferResult};
 use rustc_lint::builtin::SELF_CONSTRUCTOR_FROM_OUTER_ITEM;
 use rustc_middle::ty::adjustment::{Adjust, Adjustment, AutoBorrow, AutoBorrowMutability};
@@ -1519,7 +1519,13 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         } else {
             let e = self.tainted_by_errors().unwrap_or_else(|| {
                 self.err_ctxt()
-                    .emit_inference_failure_err(self.body_id, sp, ty.into(), E0282, true)
+                    .emit_inference_failure_err(
+                        self.body_id,
+                        sp,
+                        ty.into(),
+                        TypeAnnotationNeeded::E0282,
+                        true,
+                    )
                     .emit()
             });
             let err = Ty::new_error(self.tcx, e);

compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs

@@ -29,7 +29,7 @@ use rustc_hir_analysis::check::intrinsicck::InlineAsmCtxt;
 use rustc_hir_analysis::check::potentially_plural_count;
 use rustc_hir_analysis::hir_ty_lowering::HirTyLowerer;
 use rustc_index::IndexVec;
-use rustc_infer::infer::error_reporting::{FailureCode, ObligationCauseExt};
+use rustc_infer::error_reporting::infer::{FailureCode, ObligationCauseExt};
 use rustc_infer::infer::TypeTrace;
 use rustc_infer::infer::{DefineOpaqueTypes, InferOk};
 use rustc_middle::ty::adjustment::AllowTwoPhase;

compiler/rustc_hir_typeck/src/fn_ctxt/mod.rs

@@ -15,9 +15,9 @@ use hir::def_id::CRATE_DEF_ID;
 use rustc_hir as hir;
 use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_hir_analysis::hir_ty_lowering::{HirTyLowerer, RegionInferReason};
+use rustc_infer::error_reporting::infer::sub_relations::SubRelations;
+use rustc_infer::error_reporting::infer::TypeErrCtxt;
 use rustc_infer::infer;
-use rustc_infer::infer::error_reporting::sub_relations::SubRelations;
-use rustc_infer::infer::error_reporting::TypeErrCtxt;
 use rustc_middle::ty::{self, Const, Ty, TyCtxt, TypeVisitableExt};
 use rustc_session::Session;
 use rustc_span::symbol::Ident;

compiler/rustc_hir_typeck/src/method/probe.rs

@@ -12,7 +12,7 @@ use rustc_hir::HirId;
 use rustc_hir_analysis::autoderef::{self, Autoderef};
 use rustc_infer::infer::canonical::OriginalQueryValues;
 use rustc_infer::infer::canonical::{Canonical, QueryResponse};
-use rustc_infer::infer::error_reporting::TypeAnnotationNeeded::E0282;
+use rustc_infer::infer::need_type_info::TypeAnnotationNeeded;
 use rustc_infer::infer::DefineOpaqueTypes;
 use rustc_infer::infer::{self, InferOk, TyCtxtInferExt};
 use rustc_infer::traits::ObligationCauseCode;
@@ -441,7 +441,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                             self.body_id,
                             span,
                             ty.into(),
-                            E0282,
+                            TypeAnnotationNeeded::E0282,
                             !raw_ptr_call,
                         );
                         if raw_ptr_call {

compiler/rustc_hir_typeck/src/writeback.rs

@@ -8,7 +8,7 @@ use rustc_errors::{ErrorGuaranteed, StashKey};
 use rustc_hir as hir;
 use rustc_hir::intravisit::{self, Visitor};
 use rustc_hir::HirId;
-use rustc_infer::infer::error_reporting::TypeAnnotationNeeded::E0282;
+use rustc_infer::infer::need_type_info::TypeAnnotationNeeded;
 use rustc_middle::span_bug;
 use rustc_middle::traits::ObligationCause;
 use rustc_middle::ty::adjustment::{Adjust, Adjustment, PointerCoercion};
@@ -783,7 +783,7 @@ impl<'cx, 'tcx> Resolver<'cx, 'tcx> {
                     self.fcx.tcx.hir().body_owner_def_id(self.body.id()),
                     self.span.to_span(self.fcx.tcx),
                     p.into(),
-                    E0282,
+                    TypeAnnotationNeeded::E0282,
                     false,
                 )
                 .emit()

compiler/rustc_infer/src/infer/error_reporting/mod.rs → compiler/rustc_infer/src/error_reporting/infer/mod.rs

@@ -45,17 +45,11 @@
 //! ported to this system, and which relies on string concatenation at the
 //! time of error detection.
 
-use super::{InferCtxt, TypeTrace, ValuePairs};
-
-use crate::errors::{ObligationCauseFailureCode, TypeErrorAdditionalDiags};
-use crate::infer;
-use crate::infer::ExpectedFound;
-use crate::traits::{
-    IfExpressionCause, MatchExpressionArmCause, ObligationCause, ObligationCauseCode,
-    PredicateObligation,
-};
+use std::borrow::Cow;
+use std::ops::{ControlFlow, Deref};
+use std::path::PathBuf;
+use std::{cmp, fmt, iter};
 
-use crate::infer::relate::{self, RelateResult, TypeRelation};
 use rustc_data_structures::fx::{FxIndexMap, FxIndexSet};
 use rustc_errors::{
     pluralize, Applicability, Diag, DiagCtxtHandle, DiagStyledString, IntoDiagArg, StringPart,
@@ -68,6 +62,7 @@ use rustc_hir::{self as hir};
 use rustc_macros::extension;
 use rustc_middle::bug;
 use rustc_middle::dep_graph::DepContext;
+use rustc_middle::ty::error::ExpectedFound;
 use rustc_middle::ty::error::TypeErrorToStringExt;
 use rustc_middle::ty::print::{with_forced_trimmed_paths, PrintError, PrintTraitRefExt as _};
 use rustc_middle::ty::{
@@ -76,18 +71,21 @@ use rustc_middle::ty::{
 };
 use rustc_span::{sym, BytePos, DesugaringKind, Pos, Span};
 use rustc_target::spec::abi;
-use std::borrow::Cow;
-use std::ops::{ControlFlow, Deref};
-use std::path::PathBuf;
-use std::{cmp, fmt, iter};
+
+use crate::errors::{ObligationCauseFailureCode, TypeErrorAdditionalDiags};
+use crate::infer;
+use crate::infer::relate::{self, RelateResult, TypeRelation};
+use crate::infer::{InferCtxt, TypeTrace, ValuePairs};
+use crate::traits::{
+    IfExpressionCause, MatchExpressionArmCause, ObligationCause, ObligationCauseCode,
+    PredicateObligation,
+};
 
 mod note_and_explain;
 mod suggest;
 
-pub(crate) mod need_type_info;
-pub mod sub_relations;
-pub use need_type_info::TypeAnnotationNeeded;
 pub mod region;
+pub mod sub_relations;
 
 pub mod nice_region_error;
 
@@ -1242,7 +1240,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
             Some(values) => {
                 let values = self.resolve_vars_if_possible(values);
                 let (is_simple_error, exp_found) = match values {
-                    ValuePairs::Terms(infer::ExpectedFound { expected, found }) => {
+                    ValuePairs::Terms(ExpectedFound { expected, found }) => {
                         match (expected.unpack(), found.unpack()) {
                             (ty::TermKind::Ty(expected), ty::TermKind::Ty(found)) => {
                                 let is_simple_err = expected.is_simple_text(self.tcx)
@@ -1254,7 +1252,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
 
                                 (
                                     is_simple_err,
-                                    Mismatch::Variable(infer::ExpectedFound { expected, found }),
+                                    Mismatch::Variable(ExpectedFound { expected, found }),
                                 )
                             }
                             (ty::TermKind::Const(_), ty::TermKind::Const(_)) => {
@@ -1263,13 +1261,13 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
                             _ => (false, Mismatch::Fixed("type")),
                         }
                     }
-                    ValuePairs::PolySigs(infer::ExpectedFound { expected, found }) => {
+                    ValuePairs::PolySigs(ExpectedFound { expected, found }) => {
                         OpaqueTypesVisitor::visit_expected_found(self.tcx, expected, found, span)
                             .report(diag);
                         (false, Mismatch::Fixed("signature"))
                     }
                     ValuePairs::TraitRefs(_) => (false, Mismatch::Fixed("trait")),
-                    ValuePairs::Aliases(infer::ExpectedFound { expected, .. }) => {
+                    ValuePairs::Aliases(ExpectedFound { expected, .. }) => {
                         (false, Mismatch::Fixed(self.tcx.def_descr(expected.def_id)))
                     }
                     ValuePairs::Regions(_) => (false, Mismatch::Fixed("lifetime")),
@@ -1303,9 +1301,8 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
         };
         if let Some((sp, msg)) = secondary_span {
             if swap_secondary_and_primary {
-                let terr = if let Some(infer::ValuePairs::Terms(infer::ExpectedFound {
-                    expected,
-                    ..
+                let terr = if let Some(infer::ValuePairs::Terms(ExpectedFound {
+                    expected, ..
                 })) = values
                 {
                     Cow::from(format!("expected this to be `{expected}`"))

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/different_lifetimes.rs → compiler/rustc_infer/src/error_reporting/infer/nice_region_error/different_lifetimes.rs

@@ -1,21 +1,20 @@
 //! Error Reporting for Anonymous Region Lifetime Errors
 //! where both the regions are anonymous.
 
+use crate::error_reporting::infer::nice_region_error::find_anon_type::find_anon_type;
+use crate::error_reporting::infer::nice_region_error::util::AnonymousParamInfo;
+use crate::error_reporting::infer::nice_region_error::NiceRegionError;
 use crate::errors::AddLifetimeParamsSuggestion;
 use crate::errors::LifetimeMismatch;
 use crate::errors::LifetimeMismatchLabels;
-use crate::infer::error_reporting::nice_region_error::find_anon_type::find_anon_type;
-use crate::infer::error_reporting::nice_region_error::util::AnonymousParamInfo;
-use crate::infer::error_reporting::nice_region_error::NiceRegionError;
-use crate::infer::lexical_region_resolve::RegionResolutionError;
+use crate::infer::RegionResolutionError;
 use crate::infer::SubregionOrigin;
-use crate::infer::TyCtxt;
 
 use rustc_errors::Subdiagnostic;
 use rustc_errors::{Diag, ErrorGuaranteed};
 use rustc_hir::def_id::LocalDefId;
 use rustc_hir::Ty;
-use rustc_middle::ty::Region;
+use rustc_middle::ty::{Region, TyCtxt};
 
 impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
     /// Print the error message for lifetime errors when both the concerned regions are anonymous.

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/mismatched_static_lifetime.rs → compiler/rustc_infer/src/error_reporting/infer/nice_region_error/mismatched_static_lifetime.rs

@@ -1,12 +1,12 @@
 //! Error Reporting for when the lifetime for a type doesn't match the `impl` selected for a predicate
 //! to hold.
 
+use crate::error_reporting::infer::nice_region_error::NiceRegionError;
 use crate::errors::{note_and_explain, IntroducesStaticBecauseUnmetLifetimeReq};
 use crate::errors::{
     DoesNotOutliveStaticFromImpl, ImplicitStaticLifetimeSubdiag, MismatchedStaticLifetime,
 };
-use crate::infer::error_reporting::nice_region_error::NiceRegionError;
-use crate::infer::lexical_region_resolve::RegionResolutionError;
+use crate::infer::RegionResolutionError;
 use crate::infer::{SubregionOrigin, TypeTrace};
 use crate::traits::ObligationCauseCode;
 use rustc_data_structures::fx::FxIndexSet;

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/mod.rs → compiler/rustc_infer/src/error_reporting/infer/nice_region_error/mod.rs

@@ -1,6 +1,6 @@
-use crate::infer::error_reporting::TypeErrCtxt;
-use crate::infer::lexical_region_resolve::RegionResolutionError;
-use crate::infer::lexical_region_resolve::RegionResolutionError::*;
+use crate::error_reporting::infer::TypeErrCtxt;
+use crate::infer::RegionResolutionError;
+use crate::infer::RegionResolutionError::*;
 use rustc_errors::{Diag, ErrorGuaranteed};
 use rustc_hir::def_id::LocalDefId;
 use rustc_middle::ty::{self, TyCtxt};

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/named_anon_conflict.rs → compiler/rustc_infer/src/error_reporting/infer/nice_region_error/named_anon_conflict.rs

@@ -1,11 +1,9 @@
 //! Error Reporting for Anonymous Region Lifetime Errors
 //! where one region is named and the other is anonymous.
 
-use crate::infer::error_reporting::nice_region_error::NiceRegionError;
-use crate::{
-    errors::ExplicitLifetimeRequired,
-    infer::error_reporting::nice_region_error::find_anon_type::find_anon_type,
-};
+use crate::error_reporting::infer::nice_region_error::find_anon_type::find_anon_type;
+use crate::error_reporting::infer::nice_region_error::NiceRegionError;
+use crate::errors::ExplicitLifetimeRequired;
 use rustc_errors::Diag;
 use rustc_middle::ty;
 use rustc_span::symbol::kw;

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/placeholder_error.rs → compiler/rustc_infer/src/error_reporting/infer/nice_region_error/placeholder_error.rs

@@ -1,9 +1,9 @@
+use crate::error_reporting::infer::nice_region_error::NiceRegionError;
 use crate::errors::{
     ActualImplExpectedKind, ActualImplExpectedLifetimeKind, ActualImplExplNotes,
     TraitPlaceholderMismatch, TyOrSig,
 };
-use crate::infer::error_reporting::nice_region_error::NiceRegionError;
-use crate::infer::lexical_region_resolve::RegionResolutionError;
+use crate::infer::RegionResolutionError;
 use crate::infer::ValuePairs;
 use crate::infer::{SubregionOrigin, TypeTrace};
 use crate::traits::{ObligationCause, ObligationCauseCode};

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/placeholder_relation.rs → compiler/rustc_infer/src/error_reporting/infer/nice_region_error/placeholder_relation.rs

@@ -1,9 +1,6 @@
-use crate::{
-    errors::PlaceholderRelationLfNotSatisfied,
-    infer::{
-        error_reporting::nice_region_error::NiceRegionError, RegionResolutionError, SubregionOrigin,
-    },
-};
+use crate::error_reporting::infer::nice_region_error::NiceRegionError;
+use crate::errors::PlaceholderRelationLfNotSatisfied;
+use crate::infer::{RegionResolutionError, SubregionOrigin};
 use rustc_data_structures::intern::Interned;
 use rustc_errors::Diag;
 use rustc_middle::ty::{self, RePlaceholder, Region};

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/static_impl_trait.rs → compiler/rustc_infer/src/error_reporting/infer/nice_region_error/static_impl_trait.rs

@@ -1,11 +1,11 @@
 //! Error Reporting for static impl Traits.
 
+use crate::error_reporting::infer::nice_region_error::NiceRegionError;
 use crate::errors::{
     ButCallingIntroduces, ButNeedsToSatisfy, DynTraitConstraintSuggestion, MoreTargeted,
     ReqIntroducedLocations,
 };
-use crate::infer::error_reporting::nice_region_error::NiceRegionError;
-use crate::infer::lexical_region_resolve::RegionResolutionError;
+use crate::infer::RegionResolutionError;
 use crate::infer::{SubregionOrigin, TypeTrace};
 use crate::traits::{ObligationCauseCode, UnifyReceiverContext};
 use rustc_data_structures::fx::FxIndexSet;

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/trait_impl_difference.rs → compiler/rustc_infer/src/error_reporting/infer/nice_region_error/trait_impl_difference.rs

@@ -1,8 +1,8 @@
 //! Error Reporting for `impl` items that do not match the obligations from their `trait`.
 
+use crate::error_reporting::infer::nice_region_error::NiceRegionError;
 use crate::errors::{ConsiderBorrowingParamHelp, RelationshipHelp, TraitImplDiff};
-use crate::infer::error_reporting::nice_region_error::NiceRegionError;
-use crate::infer::lexical_region_resolve::RegionResolutionError;
+use crate::infer::RegionResolutionError;
 use crate::infer::{Subtype, ValuePairs};
 use rustc_errors::ErrorGuaranteed;
 use rustc_hir as hir;

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/util.rs → compiler/rustc_infer/src/error_reporting/infer/nice_region_error/util.rs

@@ -1,13 +1,13 @@
 //! Helper functions corresponding to lifetime errors due to
 //! anonymous regions.
 
-use crate::infer::error_reporting::nice_region_error::NiceRegionError;
-use crate::infer::TyCtxt;
 use rustc_hir as hir;
 use rustc_hir::def_id::LocalDefId;
-use rustc_middle::ty::{self, Binder, Region, Ty, TypeFoldable};
+use rustc_middle::ty::{self, Binder, Region, Ty, TyCtxt, TypeFoldable};
 use rustc_span::Span;
 
+use crate::error_reporting::infer::nice_region_error::NiceRegionError;
+
 /// Information about the anonymous region we are searching for.
 #[derive(Debug)]
 pub struct AnonymousParamInfo<'tcx> {