LCOV - code coverage report
Current view: top level - gcc/rust/typecheck - rust-hir-type-check-type.cc (source / functions) Coverage Total Hit
Test: gcc.info Lines: 85.6 % 583 499
Test Date: 2026-02-28 14:20:25 Functions: 85.7 % 28 24
Legend: Lines:     hit not hit

            Line data    Source code
       1              : // Copyright (C) 2020-2026 Free Software Foundation, Inc.
       2              : 
       3              : // This file is part of GCC.
       4              : 
       5              : // GCC is free software; you can redistribute it and/or modify it under
       6              : // the terms of the GNU General Public License as published by the Free
       7              : // Software Foundation; either version 3, or (at your option) any later
       8              : // version.
       9              : 
      10              : // GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      11              : // WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12              : // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      13              : // for more details.
      14              : 
      15              : // You should have received a copy of the GNU General Public License
      16              : // along with GCC; see the file COPYING3.  If not see
      17              : // <http://www.gnu.org/licenses/>.
      18              : 
      19              : #include "rust-hir-type-check-type.h"
      20              : #include "options.h"
      21              : #include "optional.h"
      22              : #include "rust-hir-map.h"
      23              : #include "rust-hir-trait-resolve.h"
      24              : #include "rust-hir-type-check-expr.h"
      25              : #include "rust-hir-path-probe.h"
      26              : #include "rust-hir-type-bounds.h"
      27              : #include "rust-immutable-name-resolution-context.h"
      28              : #include "rust-mapping-common.h"
      29              : #include "rust-substitution-mapper.h"
      30              : #include "rust-type-util.h"
      31              : #include "rust-system.h"
      32              : #include "rust-compile-base.h"
      33              : 
      34              : namespace Rust {
      35              : namespace Resolver {
      36              : 
      37              : HIR::GenericArgs
      38            0 : TypeCheckResolveGenericArguments::resolve (HIR::TypePathSegment &segment)
      39              : {
      40            0 :   TypeCheckResolveGenericArguments resolver (segment.get_locus ());
      41            0 :   switch (segment.get_type ())
      42              :     {
      43            0 :     case HIR::TypePathSegment::SegmentType::GENERIC:
      44            0 :       resolver.visit (static_cast<HIR::TypePathSegmentGeneric &> (segment));
      45            0 :       break;
      46              : 
      47              :     default:
      48              :       break;
      49              :     }
      50            0 :   return resolver.args;
      51            0 : }
      52              : 
      53              : void
      54            0 : TypeCheckResolveGenericArguments::visit (HIR::TypePathSegmentGeneric &generic)
      55              : {
      56            0 :   args = generic.get_generic_args ();
      57            0 : }
      58              : 
      59              : TyTy::BaseType *
      60       182631 : TypeCheckType::Resolve (HIR::Type &type)
      61              : {
      62              :   // is it already resolved?
      63       182631 :   auto context = TypeCheckContext::get ();
      64       182631 :   TyTy::BaseType *resolved = nullptr;
      65       182631 :   bool already_resolved
      66       182631 :     = context->lookup_type (type.get_mappings ().get_hirid (), &resolved);
      67       182631 :   if (already_resolved)
      68       122585 :     return resolved;
      69              : 
      70        60046 :   TypeCheckType resolver (type.get_mappings ().get_hirid ());
      71        60046 :   type.accept_vis (resolver);
      72        60046 :   rust_assert (resolver.translated != nullptr);
      73        60046 :   resolver.context->insert_type (type.get_mappings (), resolver.translated);
      74        60046 :   return resolver.translated;
      75        60046 : }
      76              : 
      77              : void
      78           60 : TypeCheckType::visit (HIR::BareFunctionType &fntype)
      79              : {
      80           60 :   auto binder_pin = context->push_lifetime_binder ();
      81           61 :   for (auto &lifetime_param : fntype.get_for_lifetimes ())
      82              :     {
      83            1 :       context->intern_and_insert_lifetime (lifetime_param.get_lifetime ());
      84              :     }
      85              : 
      86           60 :   TyTy::BaseType *return_type;
      87           60 :   if (fntype.has_return_type ())
      88              :     {
      89           45 :       return_type = TypeCheckType::Resolve (fntype.get_return_type ());
      90              :     }
      91              :   else
      92              :     {
      93              :       // needs a new implicit ID
      94           15 :       HirId ref = mappings.get_next_hir_id ();
      95           15 :       return_type = TyTy::TupleType::get_unit_type ();
      96           15 :       context->insert_implicit_type (ref, return_type);
      97              :     }
      98              : 
      99           60 :   std::vector<TyTy::TyVar> params;
     100           60 :   params.reserve (fntype.get_function_params ().size ());
     101              : 
     102          104 :   for (auto &param : fntype.get_function_params ())
     103              :     {
     104           44 :       TyTy::BaseType *ptype = TypeCheckType::Resolve (param.get_type ());
     105           44 :       params.emplace_back (ptype->get_ref ());
     106              :     }
     107              : 
     108           60 :   translated
     109          120 :     = new TyTy::FnPtr (fntype.get_mappings ().get_hirid (), fntype.get_locus (),
     110              :                        std::move (params),
     111           60 :                        TyTy::TyVar (return_type->get_ref ()),
     112           60 :                        fntype.get_function_qualifiers ().get_abi (),
     113          240 :                        fntype.get_function_qualifiers ().get_unsafety ());
     114           60 : }
     115              : 
     116              : void
     117          386 : TypeCheckType::visit (HIR::TupleType &tuple)
     118              : {
     119          386 :   if (tuple.is_unit_type ())
     120              :     {
     121           76 :       translated = TyTy::TupleType::get_unit_type ();
     122           76 :       return;
     123              :     }
     124              : 
     125          310 :   std::vector<TyTy::TyVar> fields;
     126          310 :   fields.reserve (tuple.get_elems ().size ());
     127              : 
     128          904 :   for (auto &elem : tuple.get_elems ())
     129              :     {
     130          594 :       auto field_ty = TypeCheckType::Resolve (*elem);
     131          594 :       fields.emplace_back (field_ty->get_ref ());
     132              :     }
     133              : 
     134          620 :   translated = new TyTy::TupleType (tuple.get_mappings ().get_hirid (),
     135          930 :                                     tuple.get_locus (), fields);
     136          310 : }
     137              : 
     138              : void
     139        46548 : TypeCheckType::visit (HIR::TypePath &path)
     140              : {
     141        46548 :   rust_debug ("{ARTHUR}: Path visited: %s", path.to_string ().c_str ());
     142              : 
     143              :   // this can happen so we need to look up the root then resolve the
     144              :   // remaining segments if possible
     145        46548 :   bool wasBigSelf = false;
     146        46548 :   size_t offset = 0;
     147        46548 :   TyTy::BaseType *root = resolve_root_path (path, &offset, &wasBigSelf);
     148        46548 :   if (root->get_kind () == TyTy::TypeKind::ERROR)
     149              :     {
     150            8 :       rust_debug_loc (path.get_locus (), "failed to resolve type-path type");
     151        45578 :       return;
     152              :     }
     153              : 
     154        46540 :   TyTy::BaseType *path_type = root->clone ();
     155        46540 :   path_type->set_ref (path.get_mappings ().get_hirid ());
     156        46540 :   context->insert_implicit_type (path.get_mappings ().get_hirid (), path_type);
     157              : 
     158        46540 :   bool fully_resolved = offset >= path.get_segments ().size ();
     159        46540 :   if (fully_resolved)
     160              :     {
     161        45562 :       translated = path_type;
     162        45562 :       rust_debug_loc (path.get_locus (), "root resolved type-path to: [%s]",
     163        45562 :                       translated->debug_str ().c_str ());
     164        45562 :       return;
     165              :     }
     166              : 
     167          978 :   translated
     168          978 :     = resolve_segments (path.get_mappings ().get_hirid (), path.get_segments (),
     169          978 :                         offset, path_type, path.get_mappings (),
     170          978 :                         path.get_locus (), wasBigSelf);
     171              : 
     172          978 :   rust_debug_loc (path.get_locus (), "resolved type-path to: [%s]",
     173         1956 :                   translated->debug_str ().c_str ());
     174              : }
     175              : 
     176              : void
     177          242 : TypeCheckType::visit (HIR::QualifiedPathInType &path)
     178              : {
     179          242 :   HIR::QualifiedPathType qual_path_type = path.get_path_type ();
     180          242 :   TyTy::BaseType *root = TypeCheckType::Resolve (qual_path_type.get_type ());
     181          242 :   if (root->get_kind () == TyTy::TypeKind::ERROR)
     182              :     {
     183            0 :       rust_debug_loc (path.get_locus (), "failed to resolve the root");
     184            0 :       return;
     185              :     }
     186              : 
     187          242 :   if (!qual_path_type.has_as_clause ())
     188              :     {
     189            1 :       translated
     190            1 :         = resolve_segments (path.get_mappings ().get_hirid (),
     191              :                             path.get_segments (), 0, translated,
     192            1 :                             path.get_mappings (), path.get_locus (), false);
     193              : 
     194            1 :       return;
     195              :     }
     196              : 
     197              :   // Resolve the trait now
     198          241 :   auto &trait_path_ref = qual_path_type.get_trait ();
     199          241 :   TraitReference *trait_ref = TraitResolver::Resolve (trait_path_ref);
     200          241 :   if (trait_ref->is_error ())
     201              :     return;
     202              : 
     203              :   // get the predicate for the bound
     204          241 :   auto specified_bound
     205              :     = get_predicate_from_bound (qual_path_type.get_trait (),
     206          241 :                                 qual_path_type.get_type (),
     207          241 :                                 BoundPolarity::RegularBound, true);
     208          241 :   if (specified_bound.is_error ())
     209              :     return;
     210              : 
     211              :   // inherit the bound
     212          482 :   root->inherit_bounds ({specified_bound});
     213              : 
     214              :   // lookup the associated item from the specified bound
     215          241 :   HIR::TypePathSegment &item_seg = path.get_associated_segment ();
     216          241 :   HIR::PathIdentSegment item_seg_identifier = item_seg.get_ident_segment ();
     217          241 :   tl::optional<TyTy::TypeBoundPredicateItem> item
     218          241 :     = specified_bound.lookup_associated_item (item_seg_identifier.to_string ());
     219          241 :   if (!item.has_value ())
     220              :     {
     221            1 :       std::string item_seg_ident_name, rich_msg;
     222            1 :       item_seg_ident_name = qual_path_type.get_trait ().to_string ();
     223            2 :       rich_msg = "not found in `" + item_seg_ident_name + "`";
     224              : 
     225            1 :       rich_location richloc (line_table, item_seg.get_locus ());
     226            1 :       richloc.add_fixit_replace (rich_msg.c_str ());
     227              : 
     228            2 :       rust_error_at (richloc, ErrorCode::E0576,
     229              :                      "cannot find associated type %qs in trait %qs",
     230            1 :                      item_seg_identifier.to_string ().c_str (),
     231              :                      item_seg_ident_name.c_str ());
     232            1 :       return;
     233            1 :     }
     234              : 
     235              :   // we try to look for the real impl item if possible
     236          240 :   TyTy::SubstitutionArgumentMappings args
     237          240 :     = TyTy::SubstitutionArgumentMappings::error ();
     238          240 :   HIR::ImplItem *impl_item = nullptr;
     239          240 :   if (root->is_concrete ())
     240              :     {
     241              :       // lookup the associated impl trait for this if we can (it might be
     242              :       // generic)
     243          131 :       AssociatedImplTrait *associated_impl_trait
     244          131 :         = lookup_associated_impl_block (specified_bound, root);
     245          131 :       if (associated_impl_trait != nullptr)
     246              :         {
     247           92 :           associated_impl_trait->setup_associated_types (root, specified_bound,
     248              :                                                          &args);
     249              : 
     250           99 :           for (auto &i :
     251           99 :                associated_impl_trait->get_impl_block ()->get_impl_items ())
     252              :             {
     253           99 :               bool found = i->get_impl_item_name ().compare (
     254           99 :                              item_seg_identifier.to_string ())
     255           99 :                            == 0;
     256           99 :               if (found)
     257              :                 {
     258           92 :                   impl_item = i.get ();
     259           92 :                   break;
     260              :                 }
     261              :             }
     262              :         }
     263              :     }
     264              : 
     265           92 :   if (impl_item == nullptr)
     266              :     {
     267              :       // this may be valid as there could be a default trait implementation here
     268              :       // and we dont need to worry if the trait item is actually implemented or
     269              :       // not because this will have already been validated as part of the trait
     270              :       // impl block
     271          148 :       translated = item->get_tyty_for_receiver (root);
     272              :     }
     273              :   else
     274              :     {
     275           92 :       HirId impl_item_id = impl_item->get_impl_mappings ().get_hirid ();
     276           92 :       bool ok = query_type (impl_item_id, &translated);
     277           92 :       if (!ok)
     278              :         return;
     279              : 
     280           92 :       if (!args.is_error ())
     281              :         {
     282              :           // apply the args
     283           92 :           translated = SubstMapperInternal::Resolve (translated, args);
     284              :         }
     285              :     }
     286              : 
     287              :   // turbo-fish segment path::<ty>
     288          240 :   if (item_seg.get_type () == HIR::TypePathSegment::SegmentType::GENERIC)
     289              :     {
     290            7 :       auto &generic_seg = static_cast<HIR::TypePathSegmentGeneric &> (item_seg);
     291              : 
     292              :       // turbo-fish segment path::<ty>
     293            7 :       if (generic_seg.has_generic_args ())
     294              :         {
     295            7 :           if (!translated->has_substitutions_defined ())
     296              :             {
     297            0 :               rust_error_at (item_seg.get_locus (),
     298              :                              "substitutions not supported for %s",
     299            0 :                              translated->as_string ().c_str ());
     300            0 :               translated
     301            0 :                 = new TyTy::ErrorType (path.get_mappings ().get_hirid ());
     302            0 :               return;
     303              :             }
     304            7 :           translated
     305            7 :             = SubstMapper::Resolve (translated, path.get_locus (),
     306            7 :                                     &generic_seg.get_generic_args (),
     307           14 :                                     context->regions_from_generic_args (
     308            7 :                                       generic_seg.get_generic_args ()));
     309              :         }
     310              :     }
     311              : 
     312              :   // continue on as a path-in-expression
     313          240 :   bool fully_resolved = path.get_segments ().empty ();
     314          240 :   if (fully_resolved)
     315              :     return;
     316              : 
     317            0 :   translated
     318            0 :     = resolve_segments (path.get_mappings ().get_hirid (), path.get_segments (),
     319            0 :                         0, translated, path.get_mappings (), path.get_locus (),
     320              :                         false);
     321          723 : }
     322              : 
     323              : TyTy::BaseType *
     324        46548 : TypeCheckType::resolve_root_path (HIR::TypePath &path, size_t *offset,
     325              :                                   bool *wasBigSelf)
     326              : {
     327        46548 :   TyTy::BaseType *root_tyty = nullptr;
     328        46548 :   *offset = 0;
     329              : 
     330        91754 :   for (size_t i = 0; i < path.get_num_segments (); i++)
     331              :     {
     332        47832 :       std::unique_ptr<HIR::TypePathSegment> &seg = path.get_segments ().at (i);
     333              : 
     334        47832 :       bool have_more_segments = (path.get_num_segments () - 1 != i);
     335        47832 :       bool is_root = *offset == 0;
     336        47832 :       NodeId ast_node_id = seg->get_mappings ().get_nodeid ();
     337              : 
     338              :       // then lookup the reference_node_id
     339        47832 :       NodeId ref_node_id = UNKNOWN_NODEID;
     340              : 
     341        47832 :       if (seg->is_lang_item ())
     342           49 :         ref_node_id = Analysis::Mappings::get ().get_lang_item_node (
     343           49 :           seg->get_lang_item ());
     344              :       else
     345              :         {
     346        47783 :           auto &nr_ctx
     347        47783 :             = Resolver2_0::ImmutableNameResolutionContext::get ().resolver ();
     348              : 
     349              :           // assign the ref_node_id if we've found something
     350        47783 :           nr_ctx.lookup (ast_node_id).map ([&ref_node_id] (NodeId resolved) {
     351        46806 :             ref_node_id = resolved;
     352              :           });
     353              :         }
     354              : 
     355              :       // ref_node_id is the NodeId that the segments refers to.
     356        47832 :       if (ref_node_id == UNKNOWN_NODEID)
     357              :         {
     358          977 :           if (is_root)
     359              :             {
     360            0 :               rust_error_at (seg->get_locus (),
     361              :                              "unknown reference for resolved name: %qs",
     362            0 :                              seg->to_string ().c_str ());
     363            0 :               return new TyTy::ErrorType (path.get_mappings ().get_hirid ());
     364              :             }
     365          977 :           else if (root_tyty == nullptr)
     366              :             {
     367            1 :               rust_error_at (seg->get_locus (),
     368              :                              "unknown reference for resolved name: %qs",
     369            1 :                              seg->to_string ().c_str ());
     370            1 :               return new TyTy::ErrorType (path.get_mappings ().get_hirid ());
     371              :             }
     372              :           return root_tyty;
     373              :         }
     374              : 
     375        46855 :       if (seg->is_ident_only () && seg->to_string () == "Self")
     376         7909 :         *wasBigSelf = true;
     377              : 
     378              :       // node back to HIR
     379        46855 :       tl::optional<HirId> hid = mappings.lookup_node_to_hir (ref_node_id);
     380        46855 :       if (!hid.has_value ())
     381              :         {
     382            0 :           if (is_root)
     383              :             {
     384            0 :               rust_error_at (seg->get_locus (), "789 reverse lookup failure");
     385            0 :               rust_debug_loc (
     386              :                 seg->get_locus (),
     387              :                 "failure with [%s] mappings [%s] ref_node_id [%u]",
     388            0 :                 seg->to_string ().c_str (),
     389            0 :                 seg->get_mappings ().as_string ().c_str (), ref_node_id);
     390              : 
     391            0 :               return new TyTy::ErrorType (path.get_mappings ().get_hirid ());
     392              :             }
     393              : 
     394              :           return root_tyty;
     395              :         }
     396        46855 :       auto ref = hid.value ();
     397              : 
     398        46855 :       auto seg_is_module = mappings.lookup_module (ref).has_value ();
     399        46855 :       auto seg_is_crate = mappings.is_local_hirid_crate (ref);
     400        46855 :       if (seg_is_module || seg_is_crate)
     401              :         {
     402              :           // A::B::C::this_is_a_module::D::E::F
     403              :           //          ^^^^^^^^^^^^^^^^
     404              :           //          Currently handling this.
     405          308 :           if (have_more_segments)
     406              :             {
     407          308 :               (*offset)++;
     408          308 :               continue;
     409              :             }
     410              : 
     411              :           // In the case of :
     412              :           // A::B::C::this_is_a_module
     413              :           //          ^^^^^^^^^^^^^^^^
     414              :           // This is an error, we are not expecting a module.
     415            0 :           rust_error_at (seg->get_locus (), "expected value");
     416            0 :           return new TyTy::ErrorType (path.get_mappings ().get_hirid ());
     417              :         }
     418              : 
     419        46547 :       TyTy::BaseType *lookup = nullptr;
     420        46547 :       if (!query_type (ref, &lookup))
     421              :         {
     422            1 :           if (is_root || root_tyty == nullptr)
     423              :             {
     424            1 :               rust_error_at (seg->get_locus (),
     425              :                              "failed to resolve type path segment: %qs",
     426            1 :                              seg->to_string ().c_str ());
     427            1 :               return new TyTy::ErrorType (path.get_mappings ().get_hirid ());
     428              :             }
     429              : 
     430              :           return root_tyty;
     431              :         }
     432              : 
     433              :       // if we have a previous segment type
     434        46546 :       if (root_tyty != nullptr)
     435              :         {
     436              :           // if this next segment needs substitution we must apply the
     437              :           // previous type arguments
     438              :           //
     439              :           // such as: GenericStruct::<_>::new(123, 456)
     440            0 :           if (lookup->needs_generic_substitutions ())
     441              :             {
     442            0 :               if (!root_tyty->needs_generic_substitutions ())
     443              :                 {
     444            0 :                   auto used_args_in_prev_segment
     445            0 :                     = GetUsedSubstArgs::From (root_tyty);
     446            0 :                   lookup
     447            0 :                     = SubstMapperInternal::Resolve (lookup,
     448              :                                                     used_args_in_prev_segment);
     449            0 :                 }
     450              :             }
     451              :         }
     452              : 
     453              :       // turbo-fish segment path::<ty>
     454        46546 :       if (seg->is_generic_segment ())
     455              :         {
     456         1890 :           auto &generic_segment
     457         1890 :             = static_cast<HIR::TypePathSegmentGeneric &> (*seg);
     458              : 
     459         1890 :           auto regions = context->regions_from_generic_args (
     460         1890 :             generic_segment.get_generic_args ());
     461         1890 :           lookup = SubstMapper::Resolve (lookup, path.get_locus (),
     462         1890 :                                          &generic_segment.get_generic_args (),
     463              :                                          regions);
     464         1890 :           if (lookup->get_kind () == TyTy::TypeKind::ERROR)
     465            3 :             return new TyTy::ErrorType (seg->get_mappings ().get_hirid ());
     466         1890 :         }
     467        44656 :       else if (lookup->needs_generic_substitutions ())
     468              :         {
     469          175 :           HIR::GenericArgs empty
     470          175 :             = HIR::GenericArgs::create_empty (path.get_locus ());
     471          175 :           lookup
     472          175 :             = SubstMapper::Resolve (lookup, path.get_locus (), &empty,
     473          175 :                                     context->regions_from_generic_args (empty));
     474          175 :         }
     475              : 
     476        46543 :       *offset = *offset + 1;
     477        46543 :       root_tyty = lookup;
     478              : 
     479              :       // this enforces the proper get_segments checks to take place
     480        91441 :       auto *maybe_adt = root_tyty->try_as<const TyTy::ADTType> ();
     481         5587 :       if (maybe_adt && maybe_adt->is_enum ())
     482              :         return root_tyty;
     483              :     }
     484              : 
     485              :   return root_tyty;
     486              : }
     487              : 
     488              : bool
     489          845 : TypeCheckType::resolve_associated_type (const std::string &search,
     490              :                                         TypeCheckBlockContextItem &ctx,
     491              :                                         TyTy::BaseType **result)
     492              : {
     493          845 :   if (ctx.is_trait_block ())
     494              :     {
     495          697 :       HIR::Trait &trait = ctx.get_trait ();
     496          778 :       for (auto &item : trait.get_trait_items ())
     497              :         {
     498          760 :           if (item->get_item_kind () != HIR::TraitItem::TraitItemKind::TYPE)
     499           19 :             continue;
     500              : 
     501          741 :           if (item->trait_identifier () == search)
     502              :             {
     503          679 :               HirId item_id = item->get_mappings ().get_hirid ();
     504          679 :               if (query_type (item_id, result))
     505          813 :                 return true;
     506              :             }
     507              :         }
     508              : 
     509              :       // FIXME
     510              :       // query any parent trait?
     511              : 
     512              :       return false;
     513              :     }
     514              : 
     515              :   // look for any segment in here which matches
     516          148 :   HIR::ImplBlock &block = ctx.get_impl_block ();
     517          169 :   for (auto &item : block.get_impl_items ())
     518              :     {
     519          155 :       if (item->get_impl_item_type () != HIR::ImplItem::TYPE_ALIAS)
     520           14 :         continue;
     521              : 
     522          141 :       if (item->get_impl_item_name () == search)
     523              :         {
     524          134 :           HirId item_id = item->get_impl_mappings ().get_hirid ();
     525          134 :           if (query_type (item_id, result))
     526          813 :             return true;
     527              :         }
     528              :     }
     529              : 
     530              :   return false;
     531              : }
     532              : 
     533              : TyTy::BaseType *
     534          979 : TypeCheckType::resolve_segments (
     535              :   HirId expr_id, std::vector<std::unique_ptr<HIR::TypePathSegment>> &segments,
     536              :   size_t offset, TyTy::BaseType *tyseg,
     537              :   const Analysis::NodeMapping &expr_mappings, location_t expr_locus,
     538              :   bool tySegIsBigSelf)
     539              : {
     540          979 :   TyTy::BaseType *prev_segment = tyseg;
     541         1954 :   for (size_t i = offset; i < segments.size (); i++)
     542              :     {
     543          978 :       std::unique_ptr<HIR::TypePathSegment> &seg = segments.at (i);
     544              : 
     545          978 :       bool reciever_is_generic
     546          978 :         = prev_segment->get_kind () == TyTy::TypeKind::PARAM;
     547          978 :       bool probe_bounds = true;
     548          978 :       bool probe_impls = !reciever_is_generic;
     549          978 :       bool ignore_mandatory_trait_items = !reciever_is_generic;
     550          978 :       bool first_segment = i == offset;
     551          978 :       bool selfResolveOk = false;
     552              : 
     553          978 :       if (first_segment && tySegIsBigSelf
     554          978 :           && context->block_context ().is_in_context ())
     555              :         {
     556          845 :           TypeCheckBlockContextItem ctx = context->block_context ().peek ();
     557          845 :           TyTy::BaseType *lookup = nullptr;
     558          845 :           selfResolveOk
     559          845 :             = resolve_associated_type (seg->to_string (), ctx, &lookup);
     560          845 :           if (selfResolveOk)
     561              :             {
     562          813 :               prev_segment = tyseg;
     563          813 :               tyseg = lookup;
     564              :             }
     565              :         }
     566          845 :       if (!selfResolveOk)
     567              :         {
     568              :           // probe the path is done in two parts one where we search impls if no
     569              :           // candidate is found then we search extensions from traits
     570          165 :           auto candidates
     571              :             = PathProbeType::Probe (prev_segment, seg->get_ident_segment (),
     572              :                                     probe_impls, false,
     573          165 :                                     ignore_mandatory_trait_items);
     574          165 :           if (candidates.size () == 0)
     575              :             {
     576          149 :               candidates
     577          149 :                 = PathProbeType::Probe (prev_segment, seg->get_ident_segment (),
     578              :                                         false, probe_bounds,
     579          149 :                                         ignore_mandatory_trait_items);
     580          149 :               if (candidates.size () == 0)
     581              :                 {
     582            1 :                   prev_segment->debug ();
     583            1 :                   rust_error_at (
     584              :                     seg->get_locus (),
     585              :                     "failed to resolve path segment using an impl Probe");
     586            1 :                   return new TyTy::ErrorType (expr_id);
     587              :                 }
     588              :             }
     589              : 
     590          164 :           if (candidates.size () > 1)
     591              :             {
     592            0 :               ReportMultipleCandidateError::Report (candidates,
     593              :                                                     seg->get_ident_segment (),
     594              :                                                     seg->get_locus ());
     595            0 :               return new TyTy::ErrorType (expr_id);
     596              :             }
     597              : 
     598          164 :           auto &candidate = *candidates.begin ();
     599          164 :           prev_segment = tyseg;
     600          164 :           tyseg = candidate.ty;
     601              : 
     602          164 :           if (candidate.is_enum_candidate ())
     603              :             {
     604            2 :               TyTy::ADTType *adt = static_cast<TyTy::ADTType *> (tyseg);
     605            2 :               auto last_variant = adt->get_variants ();
     606            2 :               TyTy::VariantDef *variant = last_variant.back ();
     607              : 
     608            2 :               rich_location richloc (line_table, seg->get_locus ());
     609            2 :               richloc.add_fixit_replace ("not a type");
     610              : 
     611            2 :               rust_error_at (richloc, ErrorCode::E0573,
     612              :                              "expected type, found variant of %<%s::%s%>",
     613            4 :                              adt->get_name ().c_str (),
     614            2 :                              variant->get_identifier ().c_str ());
     615            2 :               return new TyTy::ErrorType (expr_id);
     616            2 :             }
     617          165 :         }
     618              : 
     619          975 :       if (seg->is_generic_segment ())
     620              :         {
     621            0 :           auto &generic_segment
     622            0 :             = static_cast<HIR::TypePathSegmentGeneric &> (*seg);
     623              : 
     624            0 :           std::vector<TyTy::Region> regions;
     625            0 :           for (auto &lifetime :
     626            0 :                generic_segment.get_generic_args ().get_lifetime_args ())
     627              :             {
     628            0 :               auto region = context->lookup_and_resolve_lifetime (lifetime);
     629            0 :               if (!region.has_value ())
     630              :                 {
     631            0 :                   rust_error_at (lifetime.get_locus (),
     632              :                                  "failed to resolve lifetime");
     633            0 :                   return new TyTy::ErrorType (expr_id);
     634              :                 }
     635            0 :               regions.push_back (region.value ());
     636              :             }
     637              : 
     638            0 :           tyseg = SubstMapper::Resolve (tyseg, expr_locus,
     639            0 :                                         &generic_segment.get_generic_args (),
     640              :                                         regions);
     641            0 :           if (tyseg->get_kind () == TyTy::TypeKind::ERROR)
     642            0 :             return new TyTy::ErrorType (expr_id);
     643            0 :         }
     644              :     }
     645              : 
     646              :   return tyseg;
     647              : }
     648              : 
     649              : void
     650          166 : TypeCheckType::visit (HIR::TraitObjectType &type)
     651              : {
     652          166 :   std::vector<TyTy::TypeBoundPredicate> specified_bounds;
     653          344 :   for (auto &bound : type.get_type_param_bounds ())
     654              :     {
     655              :       // TODO: here we need to check if there are additional bounds that aren't
     656              :       // auto traits. this is an error. for example, `dyn A + Sized + Sync` is
     657              :       // okay, because Sized and Sync are both auto traits but `dyn A + Copy +
     658              :       // Clone` is not okay and should error out.
     659              : 
     660          178 :       if (bound->get_bound_type ()
     661              :           != HIR::TypeParamBound::BoundType::TRAITBOUND)
     662            7 :         continue;
     663              : 
     664          171 :       HIR::TypeParamBound &b = *bound.get ();
     665          171 :       HIR::TraitBound &trait_bound = static_cast<HIR::TraitBound &> (b);
     666              : 
     667          171 :       auto binder_pin = context->push_lifetime_binder ();
     668          178 :       for (auto &lifetime_param : trait_bound.get_for_lifetimes ())
     669              :         {
     670            7 :           context->intern_and_insert_lifetime (lifetime_param.get_lifetime ());
     671              :         }
     672              : 
     673          171 :       TyTy::TypeBoundPredicate predicate = get_predicate_from_bound (
     674              :         trait_bound.get_path (),
     675          171 :         tl::nullopt /*this will setup a PLACEHOLDER for self*/);
     676              : 
     677          171 :       if (!predicate.is_error ()
     678          171 :           && predicate.is_object_safe (true, type.get_locus ()))
     679          169 :         specified_bounds.push_back (std::move (predicate));
     680          171 :     }
     681              : 
     682          166 :   RustIdent ident{CanonicalPath::create_empty (), type.get_locus ()};
     683          166 :   translated
     684          166 :     = new TyTy::DynamicObjectType (type.get_mappings ().get_hirid (), ident,
     685          332 :                                    std::move (specified_bounds));
     686          166 : }
     687              : 
     688              : void
     689            5 : TypeCheckType::visit (HIR::ParenthesisedType &type)
     690              : {
     691              :   // I think this really needs to be a tuple.. but will sort that out when we
     692              :   // fix the parser issue
     693            5 :   translated = TypeCheckType::Resolve (type.get_type_in_parens ());
     694            5 : }
     695              : 
     696              : void
     697          663 : TypeCheckType::visit (HIR::ArrayType &type)
     698              : {
     699          663 :   auto element_type = TypeCheckType::Resolve (type.get_element_type ());
     700          663 :   auto capacity_type = TypeCheckExpr::Resolve (type.get_size_expr ());
     701          663 :   if (capacity_type->get_kind () == TyTy::TypeKind::ERROR)
     702            0 :     return;
     703              : 
     704          663 :   TyTy::BaseType *expected_ty = nullptr;
     705          663 :   bool ok = context->lookup_builtin ("usize", &expected_ty);
     706          663 :   rust_assert (ok);
     707              : 
     708          663 :   TyTy::BaseConstType *const_type = nullptr;
     709          663 :   if (capacity_type->get_kind () == TyTy::TypeKind::CONST)
     710              :     {
     711           36 :       const_type = capacity_type->as_const_type ();
     712              : 
     713           72 :       unify_site (type.get_size_expr ().get_mappings ().get_hirid (),
     714           36 :                   TyTy::TyWithLocation (expected_ty),
     715              :                   TyTy::TyWithLocation (const_type->get_specified_type (),
     716           36 :                                         type.get_size_expr ().get_locus ()),
     717           36 :                   type.get_size_expr ().get_locus ());
     718              :     }
     719              :   else
     720              :     {
     721          627 :       HirId size_id = type.get_size_expr ().get_mappings ().get_hirid ();
     722          627 :       TyTy::BaseType *result
     723         1254 :         = unify_site (size_id, TyTy::TyWithLocation (expected_ty),
     724              :                       TyTy::TyWithLocation (capacity_type,
     725          627 :                                             type.get_size_expr ().get_locus ()),
     726          627 :                       type.get_size_expr ().get_locus ());
     727              : 
     728          627 :       if (result->is<TyTy::ErrorType> ())
     729            1 :         const_type = new TyTy::ConstErrorType (expected_ty, size_id, size_id);
     730              :       else
     731              :         {
     732          626 :           auto ctx = Compile::Context::get ();
     733          626 :           tree capacity_expr
     734          626 :             = Compile::HIRCompileBase::query_compile_const_expr (
     735              :               ctx, capacity_type, type.get_size_expr ());
     736              : 
     737          626 :           const_type = new TyTy::ConstValueType (capacity_expr, expected_ty,
     738          626 :                                                  size_id, size_id);
     739          626 :           context->insert_type (type.get_size_expr ().get_mappings (),
     740          626 :                                 const_type->as_base_type ());
     741              :         }
     742              :     }
     743              : 
     744          663 :   translated
     745          663 :     = new TyTy::ArrayType (type.get_mappings ().get_hirid (), type.get_locus (),
     746              :                            TyTy::TyVar (
     747          663 :                              const_type->as_base_type ()->get_ref ()),
     748         1989 :                            TyTy::TyVar (element_type->get_ref ()));
     749              : }
     750              : 
     751              : void
     752          841 : TypeCheckType::visit (HIR::SliceType &type)
     753              : {
     754          841 :   TyTy::BaseType *base = TypeCheckType::Resolve (type.get_element_type ());
     755          841 :   translated
     756          841 :     = new TyTy::SliceType (type.get_mappings ().get_hirid (), type.get_locus (),
     757         1682 :                            TyTy::TyVar (base->get_ref ()));
     758          841 : }
     759              : void
     760         4367 : TypeCheckType::visit (HIR::ReferenceType &type)
     761              : {
     762         4367 :   TyTy::BaseType *base = TypeCheckType::Resolve (type.get_base_type ());
     763         4367 :   rust_assert (type.has_lifetime ());
     764         4367 :   auto region = context->lookup_and_resolve_lifetime (type.get_lifetime ());
     765         4367 :   if (!region.has_value ())
     766              :     {
     767            2 :       rust_error_at (type.get_locus (), "failed to resolve lifetime");
     768            2 :       translated = new TyTy::ErrorType (type.get_mappings ().get_hirid ());
     769            2 :       return;
     770              :     }
     771        13095 :   translated = new TyTy::ReferenceType (type.get_mappings ().get_hirid (),
     772         4365 :                                         TyTy::TyVar (base->get_ref ()),
     773         8730 :                                         type.get_mut (), region.value ());
     774              : }
     775              : 
     776              : void
     777         6487 : TypeCheckType::visit (HIR::RawPointerType &type)
     778              : {
     779         6487 :   TyTy::BaseType *base = TypeCheckType::Resolve (type.get_base_type ());
     780         6487 :   translated
     781        12974 :     = new TyTy::PointerType (type.get_mappings ().get_hirid (),
     782         6487 :                              TyTy::TyVar (base->get_ref ()), type.get_mut ());
     783         6487 : }
     784              : 
     785              : void
     786          206 : TypeCheckType::visit (HIR::InferredType &type)
     787              : {
     788          412 :   translated = new TyTy::InferType (type.get_mappings ().get_hirid (),
     789              :                                     TyTy::InferType::InferTypeKind::GENERAL,
     790              :                                     TyTy::InferType::TypeHint::Default (),
     791          412 :                                     type.get_locus ());
     792          206 : }
     793              : 
     794              : void
     795           46 : TypeCheckType::visit (HIR::NeverType &type)
     796              : {
     797           46 :   TyTy::BaseType *lookup = nullptr;
     798           46 :   bool ok = context->lookup_builtin ("!", &lookup);
     799           46 :   rust_assert (ok);
     800              : 
     801           46 :   translated = lookup->clone ();
     802           46 : }
     803              : 
     804              : void
     805           29 : TypeCheckType::visit (HIR::ImplTraitType &type)
     806              : {
     807           29 :   std::vector<TyTy::TypeBoundPredicate> specified_bounds;
     808           58 :   for (auto &bound : type.get_type_param_bounds ())
     809              :     {
     810           29 :       if (bound->get_bound_type ()
     811              :           != HIR::TypeParamBound::BoundType::TRAITBOUND)
     812            0 :         continue;
     813              : 
     814           29 :       HIR::TypeParamBound &b = *bound.get ();
     815           29 :       HIR::TraitBound &trait_bound = static_cast<HIR::TraitBound &> (b);
     816              : 
     817           29 :       auto binder_pin = context->push_lifetime_binder ();
     818           29 :       for (auto &lifetime_param : trait_bound.get_for_lifetimes ())
     819              :         {
     820            0 :           context->intern_and_insert_lifetime (lifetime_param.get_lifetime ());
     821              :         }
     822              : 
     823           29 :       TyTy::TypeBoundPredicate predicate = get_predicate_from_bound (
     824              :         trait_bound.get_path (),
     825           29 :         tl::nullopt /*this will setup a PLACEHOLDER for self*/);
     826              : 
     827           29 :       if (!predicate.is_error ()
     828           29 :           && predicate.is_object_safe (true, type.get_locus ()))
     829           29 :         specified_bounds.push_back (std::move (predicate));
     830           29 :     }
     831              : 
     832           87 :   translated = new TyTy::OpaqueType (type.get_locus (),
     833           29 :                                      type.get_mappings ().get_hirid (),
     834           29 :                                      specified_bounds);
     835           29 : }
     836              : 
     837              : TyTy::ParamType *
     838        12899 : TypeResolveGenericParam::Resolve (HIR::GenericParam &param,
     839              :                                   bool resolve_trait_bounds, bool apply_sized)
     840              : {
     841        12899 :   TypeResolveGenericParam resolver (apply_sized, resolve_trait_bounds);
     842        12899 :   switch (param.get_kind ())
     843              :     {
     844        12899 :     case HIR::GenericParam::GenericKind::TYPE:
     845        12899 :       resolver.visit (static_cast<HIR::TypeParam &> (param));
     846        12899 :       break;
     847              : 
     848            0 :     case HIR::GenericParam::GenericKind::CONST:
     849            0 :       resolver.visit (static_cast<HIR::ConstGenericParam &> (param));
     850            0 :       break;
     851              : 
     852            0 :     case HIR::GenericParam::GenericKind::LIFETIME:
     853            0 :       resolver.visit (static_cast<HIR::LifetimeParam &> (param));
     854            0 :       break;
     855              :     }
     856        12899 :   return resolver.resolved;
     857        12899 : }
     858              : 
     859              : void
     860         8657 : TypeResolveGenericParam::ApplyAnyTraitBounds (HIR::TypeParam &param,
     861              :                                               TyTy::ParamType *pty)
     862              : {
     863         8657 :   TypeResolveGenericParam resolver (true, true);
     864         8657 :   resolver.apply_trait_bounds (param, pty);
     865         8656 : }
     866              : 
     867              : void
     868            0 : TypeResolveGenericParam::visit (HIR::LifetimeParam &param)
     869              : {
     870              :   // nothing to do
     871            0 : }
     872              : 
     873              : void
     874            0 : TypeResolveGenericParam::visit (HIR::ConstGenericParam &param)
     875              : {
     876              :   // TODO
     877            0 : }
     878              : 
     879              : void
     880        12899 : TypeResolveGenericParam::visit (HIR::TypeParam &param)
     881              : {
     882        12899 :   if (param.has_type ())
     883          358 :     TypeCheckType::Resolve (param.get_type ());
     884              : 
     885        25798 :   resolved = new TyTy::ParamType (param.get_type_representation ().as_string (),
     886              :                                   param.get_locus (),
     887        38697 :                                   param.get_mappings ().get_hirid (), {});
     888              : 
     889        12899 :   if (resolve_trait_bounds)
     890         4329 :     apply_trait_bounds (param, resolved);
     891        12899 : }
     892              : 
     893              : void
     894        12986 : TypeResolveGenericParam::apply_trait_bounds (HIR::TypeParam &param,
     895              :                                              TyTy::ParamType *pty)
     896              : {
     897        12986 :   std::unique_ptr<HIR::Type> implicit_self_bound = nullptr;
     898        12986 :   if (param.has_type_param_bounds ())
     899              :     {
     900              :       // We need two possible parameter types. One with no Bounds and one with
     901              :       // the bounds. the Self type for the bounds cannot itself contain the
     902              :       // bounds otherwise it will be a trait cycle
     903         1263 :       HirId implicit_id = mappings.get_next_hir_id ();
     904         1263 :       TyTy::ParamType *p
     905         1263 :         = new TyTy::ParamType (param.get_type_representation ().as_string (),
     906              :                                param.get_locus (), implicit_id,
     907         2526 :                                {} /*empty specified bounds*/);
     908         1263 :       context->insert_implicit_type (implicit_id, p);
     909              : 
     910              :       // generate an implicit HIR Type we can apply to the predicate
     911         1263 :       Analysis::NodeMapping mappings (param.get_mappings ().get_crate_num (),
     912         1263 :                                       param.get_mappings ().get_nodeid (),
     913              :                                       implicit_id,
     914         1263 :                                       param.get_mappings ().get_local_defid ());
     915         2526 :       implicit_self_bound = std::make_unique<HIR::TypePath> (
     916         3789 :         HIR::TypePath (mappings, {}, BUILTINS_LOCATION, false));
     917              :     }
     918              : 
     919        12986 :   std::map<DefId, std::vector<TyTy::TypeBoundPredicate>> predicates;
     920              : 
     921              :   // https://doc.rust-lang.org/std/marker/trait.Sized.html
     922              :   // All type parameters have an implicit bound of Sized. The special syntax
     923              :   // ?Sized can be used to remove this bound if it’s not appropriate.
     924              :   //
     925              :   // We can only do this when we are not resolving the implicit Self for Sized
     926              :   // itself
     927        12986 :   if (apply_sized)
     928              :     {
     929         9298 :       TyTy::TypeBoundPredicate sized_predicate
     930         9298 :         = get_marker_predicate (LangItem::Kind::SIZED, param.get_locus ());
     931              : 
     932        18594 :       predicates[sized_predicate.get_id ()] = {sized_predicate};
     933         9297 :     }
     934              : 
     935              :   // resolve the bounds
     936        12985 :   if (param.has_type_param_bounds ())
     937              :     {
     938         2587 :       for (auto &bound : param.get_type_param_bounds ())
     939              :         {
     940         1324 :           switch (bound->get_bound_type ())
     941              :             {
     942         1324 :             case HIR::TypeParamBound::BoundType::TRAITBOUND:
     943         1324 :               {
     944         1324 :                 HIR::TraitBound &b = static_cast<HIR::TraitBound &> (*bound);
     945              : 
     946         1324 :                 TyTy::TypeBoundPredicate predicate = get_predicate_from_bound (
     947              :                   b.get_path (),
     948              :                   tl::optional<std::reference_wrapper<HIR::Type>> (
     949         1324 :                     std::ref (*implicit_self_bound)),
     950         1324 :                   b.get_polarity ());
     951         1324 :                 if (!predicate.is_error ())
     952              :                   {
     953         1323 :                     switch (predicate.get_polarity ())
     954              :                       {
     955          385 :                       case BoundPolarity::AntiBound:
     956          385 :                         {
     957          385 :                           bool found = predicates.find (predicate.get_id ())
     958          385 :                                        != predicates.end ();
     959          385 :                           if (found)
     960          385 :                             predicates.erase (predicate.get_id ());
     961              :                           else
     962              :                             {
     963              :                               // emit error message
     964            0 :                               rich_location r (line_table, b.get_locus ());
     965            0 :                               r.add_range (predicate.get ()->get_locus ());
     966            0 :                               rust_error_at (
     967              :                                 r, "antibound for %s is not applied here",
     968            0 :                                 predicate.get ()->get_name ().c_str ());
     969            0 :                             }
     970              :                         }
     971              :                         break;
     972              : 
     973          938 :                       default:
     974          938 :                         {
     975          938 :                           if (predicates.find (predicate.get_id ())
     976          938 :                               == predicates.end ())
     977              :                             {
     978          929 :                               predicates[predicate.get_id ()] = {};
     979              :                             }
     980          938 :                           predicates[predicate.get_id ()].push_back (predicate);
     981              :                         }
     982          938 :                         break;
     983              :                       }
     984              :                   }
     985         1324 :               }
     986         1324 :               break;
     987              : 
     988              :             default:
     989              :               break;
     990              :             }
     991              :         }
     992              :     }
     993              : 
     994              :   // now to flat map the specified_bounds into the raw specified predicates
     995        25970 :   std::vector<TyTy::TypeBoundPredicate> specified_bounds;
     996        22826 :   for (auto it = predicates.begin (); it != predicates.end (); it++)
     997              :     {
     998        19691 :       for (const auto &predicate : it->second)
     999              :         {
    1000         9850 :           specified_bounds.push_back (predicate);
    1001              :         }
    1002              :     }
    1003              : 
    1004              :   // inherit them
    1005        12985 :   pty->inherit_bounds (specified_bounds);
    1006        12985 : }
    1007              : 
    1008              : void
    1009          565 : ResolveWhereClauseItem::Resolve (HIR::WhereClauseItem &item,
    1010              :                                  TyTy::RegionConstraints &region_constraints)
    1011              : {
    1012          565 :   ResolveWhereClauseItem resolver (region_constraints);
    1013              : 
    1014          565 :   auto binder_pin = resolver.context->push_lifetime_binder ();
    1015              : 
    1016          565 :   switch (item.get_item_type ())
    1017              :     {
    1018            2 :     case HIR::WhereClauseItem::LIFETIME:
    1019            2 :       resolver.visit (static_cast<HIR::LifetimeWhereClauseItem &> (item));
    1020            2 :       break;
    1021              : 
    1022          563 :     case HIR::WhereClauseItem::TYPE_BOUND:
    1023          563 :       resolver.visit (static_cast<HIR::TypeBoundWhereClauseItem &> (item));
    1024          563 :       break;
    1025              :     }
    1026          565 : }
    1027              : 
    1028              : void
    1029            2 : ResolveWhereClauseItem::visit (HIR::LifetimeWhereClauseItem &item)
    1030              : {
    1031            2 :   auto lhs = context->lookup_and_resolve_lifetime (item.get_lifetime ());
    1032            2 :   if (!lhs.has_value ())
    1033              :     {
    1034            0 :       rust_error_at (UNKNOWN_LOCATION, "failed to resolve lifetime");
    1035              :     }
    1036            4 :   for (auto &lifetime : item.get_lifetime_bounds ())
    1037              :     {
    1038            2 :       auto rhs_i = context->lookup_and_resolve_lifetime (lifetime);
    1039            2 :       if (!rhs_i.has_value ())
    1040              :         {
    1041            0 :           rust_error_at (UNKNOWN_LOCATION, "failed to resolve lifetime");
    1042              :         }
    1043            2 :       region_constraints.region_region.emplace_back (lhs.value (),
    1044              :                                                      rhs_i.value ());
    1045              :     }
    1046            2 : }
    1047              : 
    1048              : void
    1049          563 : ResolveWhereClauseItem::visit (HIR::TypeBoundWhereClauseItem &item)
    1050              : {
    1051          563 :   auto binder_pin = context->push_lifetime_binder ();
    1052          563 :   if (item.has_for_lifetimes ())
    1053              :     {
    1054           14 :       for (auto &lifetime_param : item.get_for_lifetimes ())
    1055              :         {
    1056            7 :           context->intern_and_insert_lifetime (lifetime_param.get_lifetime ());
    1057              :         }
    1058              :     }
    1059              : 
    1060          563 :   auto &binding_type_path = item.get_bound_type ();
    1061          563 :   TyTy::BaseType *binding = TypeCheckType::Resolve (binding_type_path);
    1062              : 
    1063              :   // FIXME double check there might be a trait cycle here see TypeParam handling
    1064              : 
    1065          563 :   std::vector<TyTy::TypeBoundPredicate> specified_bounds;
    1066         1126 :   for (auto &bound : item.get_type_param_bounds ())
    1067              :     {
    1068          563 :       switch (bound->get_bound_type ())
    1069              :         {
    1070          559 :         case HIR::TypeParamBound::BoundType::TRAITBOUND:
    1071          559 :           {
    1072          559 :             auto *b = static_cast<HIR::TraitBound *> (bound.get ());
    1073              : 
    1074          559 :             TyTy::TypeBoundPredicate predicate
    1075          559 :               = get_predicate_from_bound (b->get_path (), binding_type_path);
    1076          559 :             if (!predicate.is_error ())
    1077          559 :               specified_bounds.push_back (std::move (predicate));
    1078          559 :           }
    1079          559 :           break;
    1080            4 :         case HIR::TypeParamBound::BoundType::LIFETIME:
    1081            4 :           {
    1082            8 :             if (auto param = binding->try_as<TyTy::ParamType> ())
    1083              :               {
    1084            4 :                 auto *b = static_cast<HIR::Lifetime *> (bound.get ());
    1085            4 :                 auto region = context->lookup_and_resolve_lifetime (*b);
    1086            4 :                 if (!region.has_value ())
    1087              :                   {
    1088            0 :                     rust_error_at (UNKNOWN_LOCATION,
    1089              :                                    "failed to resolve lifetime");
    1090              :                   }
    1091            4 :                 region_constraints.type_region.emplace_back (param,
    1092              :                                                              region.value ());
    1093              :               }
    1094              :           }
    1095            4 :           break;
    1096              : 
    1097              :         default:
    1098              :           break;
    1099              :         }
    1100              :     }
    1101          563 :   binding->inherit_bounds (specified_bounds);
    1102              : 
    1103              :   // When we apply these bounds we must lookup which type this binding
    1104              :   // resolves to, as this is the type which will be used during resolution
    1105              :   // of the block.
    1106          563 :   NodeId ast_node_id = binding_type_path.get_mappings ().get_nodeid ();
    1107              : 
    1108              :   // then lookup the reference_node_id
    1109          563 :   NodeId ref_node_id = UNKNOWN_NODEID;
    1110              : 
    1111          563 :   auto &nr_ctx
    1112          563 :     = Resolver2_0::ImmutableNameResolutionContext::get ().resolver ();
    1113              : 
    1114          563 :   if (auto id = nr_ctx.lookup (ast_node_id))
    1115              :     {
    1116          563 :       ref_node_id = *id;
    1117              :     }
    1118              :   else
    1119              :     {
    1120              :       // FIXME
    1121            0 :       rust_error_at (UNDEF_LOCATION,
    1122              :                      "Failed to lookup type reference for node: %s",
    1123            0 :                      binding_type_path.to_string ().c_str ());
    1124            0 :       return;
    1125              :     }
    1126              : 
    1127              :   // node back to HIR
    1128          563 :   if (auto hid = mappings.lookup_node_to_hir (ref_node_id))
    1129              :     {
    1130              :       // the base reference for this name _must_ have a type set
    1131          563 :       TyTy::BaseType *lookup;
    1132          563 :       if (!context->lookup_type (*hid, &lookup))
    1133              :         {
    1134            0 :           rust_error_at (mappings.lookup_location (*hid),
    1135              :                          "Failed to resolve where-clause binding type: %s",
    1136            0 :                          binding_type_path.to_string ().c_str ());
    1137            0 :           return;
    1138              :         }
    1139              : 
    1140              :       // FIXME
    1141              :       // rust_assert (binding->is_equal (*lookup));
    1142          563 :       lookup->inherit_bounds (specified_bounds);
    1143          563 :       return;
    1144              :     }
    1145            0 :   rust_error_at (UNDEF_LOCATION, "where-clause reverse lookup failure");
    1146          563 : }
    1147              : 
    1148              : } // namespace Resolver
    1149              : } // namespace Rust
        

Generated by: LCOV version 2.4-beta

LCOV profile is generated on x86_64 machine using following configure options: configure --disable-bootstrap --enable-coverage=opt --enable-languages=c,c++,fortran,go,jit,lto,rust,m2 --enable-host-shared. GCC test suite is run with the built compiler.