Auto merge of #107753 - kylematsuda:type-of, r=BoxyUwU

Switch to `EarlyBinder` for `type_of` query

Part of the work to finish #105779 and implement rust-lang/types-team#78.

Several queries `X` have a `bound_X` variant that wraps the output in `EarlyBinder`. This adds `EarlyBinder` to the return type of the `type_of` query and removes `bound_type_of`.

r? `@lcnr`

Author: bors

compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -2592,7 +2592,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
             if is_closure {
                 None
             } else {
-                let ty = self.infcx.tcx.type_of(self.mir_def_id());
+                let ty = self.infcx.tcx.type_of(self.mir_def_id()).subst_identity();
                 match ty.kind() {
                     ty::FnDef(_, _) | ty::FnPtr(_) => self.annotate_fn_sig(
                         self.mir_def_id(),

compiler/rustc_borrowck/src/diagnostics/mod.rs

@@ -1185,7 +1185,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                     let parent_self_ty =
                         matches!(tcx.def_kind(parent_did), rustc_hir::def::DefKind::Impl { .. })
                             .then_some(parent_did)
-                            .and_then(|did| match tcx.type_of(did).kind() {
+                            .and_then(|did| match tcx.type_of(did).subst_identity().kind() {
                                 ty::Adt(def, ..) => Some(def.did()),
                                 _ => None,
                             });

compiler/rustc_borrowck/src/diagnostics/region_errors.rs

@@ -575,7 +575,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
 
         let mut output_ty = self.regioncx.universal_regions().unnormalized_output_ty;
         if let ty::Alias(ty::Opaque, ty::AliasTy { def_id, .. }) = *output_ty.kind() {
-            output_ty = self.infcx.tcx.type_of(def_id)
+            output_ty = self.infcx.tcx.type_of(def_id).subst_identity()
         };
 
         debug!("report_fnmut_error: output_ty={:?}", output_ty);
@@ -896,7 +896,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
             debug!(?fn_did, ?substs);
 
             // Only suggest this on function calls, not closures
-            let ty = tcx.type_of(fn_did);
+            let ty = tcx.type_of(fn_did).subst_identity();
             debug!("ty: {:?}, ty.kind: {:?}", ty, ty.kind());
             if let ty::Closure(_, _) = ty.kind() {
                 return;

compiler/rustc_borrowck/src/diagnostics/region_name.rs

@@ -849,8 +849,9 @@ impl<'tcx> MirBorrowckCtxt<'_, 'tcx> {
             return None;
         };
 
-        let found = tcx
-            .any_free_region_meets(&tcx.type_of(region_parent), |r| *r == ty::ReEarlyBound(region));
+        let found = tcx.any_free_region_meets(&tcx.type_of(region_parent).subst_identity(), |r| {
+            *r == ty::ReEarlyBound(region)
+        });
 
         Some(RegionName {
             name: self.synthesize_region_name(),

compiler/rustc_borrowck/src/type_check/mod.rs

@@ -402,7 +402,7 @@ impl<'a, 'b, 'tcx> Visitor<'tcx> for TypeVerifier<'a, 'b, 'tcx> {
                     );
                 }
             } else if let Some(static_def_id) = constant.check_static_ptr(tcx) {
-                let unnormalized_ty = tcx.type_of(static_def_id);
+                let unnormalized_ty = tcx.type_of(static_def_id).subst_identity();
                 let normalized_ty = self.cx.normalize(unnormalized_ty, locations);
                 let literal_ty = constant.literal.ty().builtin_deref(true).unwrap().ty;
 

compiler/rustc_borrowck/src/universal_regions.rs

@@ -482,11 +482,8 @@ impl<'cx, 'tcx> UniversalRegionsBuilder<'cx, 'tcx> {
                 );
                 let region =
                     self.infcx.tcx.mk_re_var(self.infcx.next_nll_region_var(FR).to_region_vid());
-                let va_list_ty = self
-                    .infcx
-                    .tcx
-                    .bound_type_of(va_list_did)
-                    .subst(self.infcx.tcx, &[region.into()]);
+                let va_list_ty =
+                    self.infcx.tcx.type_of(va_list_did).subst(self.infcx.tcx, &[region.into()]);
 
                 unnormalized_input_tys = self.infcx.tcx.mk_type_list(
                     unnormalized_input_tys.iter().copied().chain(iter::once(va_list_ty)),
@@ -529,7 +526,7 @@ impl<'cx, 'tcx> UniversalRegionsBuilder<'cx, 'tcx> {
         match tcx.hir().body_owner_kind(self.mir_def.did) {
             BodyOwnerKind::Closure | BodyOwnerKind::Fn => {
                 let defining_ty = if self.mir_def.did.to_def_id() == typeck_root_def_id {
-                    tcx.type_of(typeck_root_def_id)
+                    tcx.type_of(typeck_root_def_id).subst_identity()
                 } else {
                     let tables = tcx.typeck(self.mir_def.did);
                     tables.node_type(self.mir_hir_id)
@@ -675,7 +672,7 @@ impl<'cx, 'tcx> UniversalRegionsBuilder<'cx, 'tcx> {
                 // For a constant body, there are no inputs, and one
                 // "output" (the type of the constant).
                 assert_eq!(self.mir_def.did.to_def_id(), def_id);
-                let ty = tcx.type_of(self.mir_def.def_id_for_type_of());
+                let ty = tcx.type_of(self.mir_def.def_id_for_type_of()).subst_identity();
                 let ty = indices.fold_to_region_vids(tcx, ty);
                 ty::Binder::dummy(tcx.intern_type_list(&[ty]))
             }

compiler/rustc_codegen_llvm/src/debuginfo/mod.rs

@@ -508,7 +508,7 @@ impl<'ll, 'tcx> DebugInfoMethods<'tcx> for CodegenCx<'ll, 'tcx> {
                     let impl_self_ty = cx.tcx.subst_and_normalize_erasing_regions(
                         instance.substs,
                         ty::ParamEnv::reveal_all(),
-                        cx.tcx.type_of(impl_def_id),
+                        cx.tcx.type_of(impl_def_id).skip_binder(),
                     );
 
                     // Only "class" methods are generally understood by LLVM,

compiler/rustc_const_eval/src/interpret/intrinsics/caller_location.rs

@@ -95,7 +95,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
         // Allocate memory for `CallerLocation` struct.
         let loc_ty = self
             .tcx
-            .bound_type_of(self.tcx.require_lang_item(LangItem::PanicLocation, None))
+            .type_of(self.tcx.require_lang_item(LangItem::PanicLocation, None))
             .subst(*self.tcx, self.tcx.mk_substs([self.tcx.lifetimes.re_erased.into()].iter()));
         let loc_layout = self.layout_of(loc_ty).unwrap();
         let location = self.allocate(loc_layout, MemoryKind::CallerLocation).unwrap();

compiler/rustc_const_eval/src/interpret/memory.rs

@@ -690,7 +690,11 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                 assert!(self.tcx.is_static(def_id));
                 assert!(!self.tcx.is_thread_local_static(def_id));
                 // Use size and align of the type.
-                let ty = self.tcx.type_of(def_id);
+                let ty = self
+                    .tcx
+                    .type_of(def_id)
+                    .no_bound_vars()
+                    .expect("statics should not have generic parameters");
                 let layout = self.tcx.layout_of(ParamEnv::empty().and(ty)).unwrap();
                 assert!(layout.is_sized());
                 (layout.size, layout.align.abi, AllocKind::LiveData)

compiler/rustc_const_eval/src/transform/check_consts/mod.rs

@@ -68,7 +68,7 @@ impl<'mir, 'tcx> ConstCx<'mir, 'tcx> {
     pub fn fn_sig(&self) -> PolyFnSig<'tcx> {
         let did = self.def_id().to_def_id();
         if self.tcx.is_closure(did) {
-            let ty = self.tcx.type_of(did);
+            let ty = self.tcx.type_of(did).subst_identity();
             let ty::Closure(_, substs) = ty.kind() else { bug!("type_of closure not ty::Closure") };
             substs.as_closure().sig()
         } else {