rename NEEDS_SUBST and NEEDS_INFER

compiler/rustc_codegen_cranelift/src/abi/mod.rs

@@ -70,7 +70,7 @@ pub(crate) fn get_function_sig<'tcx>(
     default_call_conv: CallConv,
     inst: Instance<'tcx>,
 ) -> Signature {
-    assert!(!inst.substs.needs_infer());
+    assert!(!inst.substs.has_infer());
     clif_sig_from_fn_abi(
         tcx,
         default_call_conv,

compiler/rustc_codegen_cranelift/src/base.rs

@@ -28,7 +28,7 @@ pub(crate) fn codegen_fn<'tcx>(
     module: &mut dyn Module,
     instance: Instance<'tcx>,
 ) -> CodegenedFunction {
-    debug_assert!(!instance.substs.needs_infer());
+    debug_assert!(!instance.substs.has_infer());
 
     let symbol_name = tcx.symbol_name(instance).name.to_string();
     let _timer = tcx.prof.generic_activity_with_arg("codegen fn", &*symbol_name);

compiler/rustc_codegen_gcc/src/callee.rs

@@ -17,7 +17,7 @@ use crate::context::CodegenCx;
 pub fn get_fn<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, instance: Instance<'tcx>) -> Function<'gcc> {
     let tcx = cx.tcx();
 
-    assert!(!instance.substs.needs_infer());
+    assert!(!instance.substs.has_infer());
     assert!(!instance.substs.has_escaping_bound_vars());
 
     let sym = tcx.symbol_name(instance).name;

compiler/rustc_codegen_gcc/src/mono_item.rs

@@ -31,7 +31,7 @@ impl<'gcc, 'tcx> PreDefineMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
 
     #[cfg_attr(not(feature="master"), allow(unused_variables))]
     fn predefine_fn(&self, instance: Instance<'tcx>, linkage: Linkage, visibility: Visibility, symbol_name: &str) {
-        assert!(!instance.substs.needs_infer());
+        assert!(!instance.substs.has_infer());
 
         let fn_abi = self.fn_abi_of_instance(instance, ty::List::empty());
         self.linkage.set(base::linkage_to_gcc(linkage));

compiler/rustc_codegen_llvm/src/callee.rs

@@ -27,7 +27,7 @@ pub fn get_fn<'ll, 'tcx>(cx: &CodegenCx<'ll, 'tcx>, instance: Instance<'tcx>) ->
 
     debug!("get_fn(instance={:?})", instance);
 
-    assert!(!instance.substs.needs_infer());
+    assert!(!instance.substs.has_infer());
     assert!(!instance.substs.has_escaping_bound_vars());
 
     if let Some(&llfn) = cx.instances.borrow().get(&instance) {

compiler/rustc_codegen_llvm/src/debuginfo/mod.rs

@@ -515,7 +515,7 @@ impl<'ll, 'tcx> DebugInfoMethods<'tcx> for CodegenCx<'ll, 'tcx> {
                         ty::Adt(def, ..) if !def.is_box() => {
                             // Again, only create type information if full debuginfo is enabled
                             if cx.sess().opts.debuginfo == DebugInfo::Full
-                                && !impl_self_ty.needs_subst()
+                                && !impl_self_ty.has_param()
                             {
                                 Some(type_di_node(cx, impl_self_ty))
                             } else {

compiler/rustc_codegen_llvm/src/mono_item.rs

@@ -48,7 +48,7 @@ impl<'tcx> PreDefineMethods<'tcx> for CodegenCx<'_, 'tcx> {
         visibility: Visibility,
         symbol_name: &str,
     ) {
-        assert!(!instance.substs.needs_infer());
+        assert!(!instance.substs.has_infer());
 
         let fn_abi = self.fn_abi_of_instance(instance, ty::List::empty());
         let lldecl = self.declare_fn(symbol_name, fn_abi);

compiler/rustc_codegen_ssa/src/mir/mod.rs

@@ -152,7 +152,7 @@ pub fn codegen_mir<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
     cx: &'a Bx::CodegenCx,
     instance: Instance<'tcx>,
 ) {
-    assert!(!instance.substs.needs_infer());
+    assert!(!instance.substs.has_infer());
 
     let llfn = cx.get_fn(instance);
 

compiler/rustc_const_eval/src/interpret/util.rs

@@ -14,7 +14,7 @@ where
     T: TypeVisitable<TyCtxt<'tcx>>,
 {
     debug!("ensure_monomorphic_enough: ty={:?}", ty);
-    if !ty.needs_subst() {
+    if !ty.has_param() {
         return Ok(());
     }
 
@@ -27,7 +27,7 @@ where
         type BreakTy = FoundParam;
 
         fn visit_ty(&mut self, ty: Ty<'tcx>) -> ControlFlow<Self::BreakTy> {
-            if !ty.needs_subst() {
+            if !ty.has_param() {
                 return ControlFlow::Continue(());
             }
 
@@ -46,7 +46,7 @@ where
                         // are used and require substitution.
                         // Just in case there are closures or generators within this subst,
                         // recurse.
-                        if unused_params.is_used(index) && subst.needs_subst() {
+                        if unused_params.is_used(index) && subst.has_param() {
                             return subst.visit_with(self);
                         }
                     }

compiler/rustc_hir_analysis/src/astconv/mod.rs

@@ -2318,7 +2318,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         let infcx = match self.infcx() {
             Some(infcx) => infcx,
             None => {
-                assert!(!self_ty.needs_infer());
+                assert!(!self_ty.has_infer());
                 infcx_ = tcx.infer_ctxt().ignoring_regions().build();
                 &infcx_
             }
@@ -2489,7 +2489,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         let infcx = if let Some(infcx) = self.infcx() {
             infcx
         } else {
-            assert!(!qself_ty.needs_infer());
+            assert!(!qself_ty.has_infer());
             infcx_ = tcx.infer_ctxt().build();
             &infcx_
         };
@@ -3039,7 +3039,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                 // the anon const, which is empty. This is why the
                 // `AlwaysApplicable` impl needs a `T: ?Sized` bound for
                 // this to compile if we were to normalize here.
-                if forbid_generic && ty.needs_subst() {
+                if forbid_generic && ty.has_param() {
                     let mut err = tcx.sess.struct_span_err(
                         path.span,
                         "generic `Self` types are currently not permitted in anonymous constants",

compiler/rustc_hir_analysis/src/check/wfcheck.rs

@@ -1027,7 +1027,7 @@ fn check_type_defn<'tcx>(tcx: TyCtxt<'tcx>, item: &hir::Item<'tcx>, all_sized: b
                 packed && {
                     let ty = tcx.type_of(variant.fields.raw.last().unwrap().did).subst_identity();
                     let ty = tcx.erase_regions(ty);
-                    if ty.needs_infer() {
+                    if ty.has_infer() {
                         tcx.sess
                             .delay_span_bug(item.span, &format!("inference variables in {:?}", ty));
                         // Just treat unresolved type expression as if it needs drop.
@@ -1292,7 +1292,7 @@ fn check_where_clauses<'tcx>(wfcx: &WfCheckingCtxt<'_, 'tcx>, span: Span, def_id
                     // Ignore dependent defaults -- that is, where the default of one type
                     // parameter includes another (e.g., `<T, U = T>`). In those cases, we can't
                     // be sure if it will error or not as user might always specify the other.
-                    if !ty.needs_subst() {
+                    if !ty.has_param() {
                         wfcx.register_wf_obligation(
                             tcx.def_span(param.def_id),
                             Some(WellFormedLoc::Ty(param.def_id.expect_local())),
@@ -1308,7 +1308,7 @@ fn check_where_clauses<'tcx>(wfcx: &WfCheckingCtxt<'_, 'tcx>, span: Span, def_id
                     // for `struct Foo<const N: usize, const M: usize = { 1 - 2 }>`
                     // we should eagerly error.
                     let default_ct = tcx.const_param_default(param.def_id).subst_identity();
-                    if !default_ct.needs_subst() {
+                    if !default_ct.has_param() {
                         wfcx.register_wf_obligation(
                             tcx.def_span(param.def_id),
                             None,
@@ -1342,7 +1342,7 @@ fn check_where_clauses<'tcx>(wfcx: &WfCheckingCtxt<'_, 'tcx>, span: Span, def_id
                 if is_our_default(param) {
                     let default_ty = tcx.type_of(param.def_id).subst_identity();
                     // ... and it's not a dependent default, ...
-                    if !default_ty.needs_subst() {
+                    if !default_ty.has_param() {
                         // ... then substitute it with the default.
                         return default_ty.into();
                     }
@@ -1355,7 +1355,7 @@ fn check_where_clauses<'tcx>(wfcx: &WfCheckingCtxt<'_, 'tcx>, span: Span, def_id
                 if is_our_default(param) {
                     let default_ct = tcx.const_param_default(param.def_id).subst_identity();
                     // ... and it's not a dependent default, ...
-                    if !default_ct.needs_subst() {
+                    if !default_ct.has_param() {
                         // ... then substitute it with the default.
                         return default_ct.into();
                     }

compiler/rustc_hir_analysis/src/coherence/orphan.rs

@@ -457,7 +457,7 @@ fn emit_newtype_suggestion_for_raw_ptr(
     ptr_ty: &ty::TypeAndMut<'_>,
     diag: &mut Diagnostic,
 ) {
-    if !self_ty.needs_subst() {
+    if !self_ty.has_param() {
         let mut_key = ptr_ty.mutbl.prefix_str();
         let msg_sugg = "consider introducing a new wrapper type".to_owned();
         let sugg = vec![

compiler/rustc_hir_analysis/src/impl_wf_check/min_specialization.rs

@@ -366,7 +366,7 @@ fn check_predicates<'tcx>(
             wf::obligations(infcx, tcx.param_env(impl1_def_id), impl1_def_id, 0, arg, span)
                 .unwrap();
 
-        assert!(!obligations.needs_infer());
+        assert!(!obligations.has_infer());
         impl2_predicates
             .extend(traits::elaborate(tcx, obligations).map(|obligation| obligation.predicate))
     }

compiler/rustc_hir_typeck/src/fn_ctxt/mod.rs

@@ -168,7 +168,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         ocx.normalize(&ObligationCause::dummy(), self.param_env, fn_sig);
                     if ocx.select_all_or_error().is_empty() {
                         let normalized_fn_sig = self.resolve_vars_if_possible(normalized_fn_sig);
-                        if !normalized_fn_sig.needs_infer() {
+                        if !normalized_fn_sig.has_infer() {
                             return normalized_fn_sig;
                         }
                     }

compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs

@@ -1384,7 +1384,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         }
         let item_ty = self.tcx.type_of(item.def_id).subst_identity();
         // FIXME(compiler-errors): This check is *so* rudimentary
-        if item_ty.needs_subst() {
+        if item_ty.has_param() {
             return false;
         }
         if self.can_coerce(item_ty, expected_ty) {

compiler/rustc_hir_typeck/src/generator_interior/drop_ranges/record_consumed_borrow.rs

@@ -202,7 +202,7 @@ impl<'tcx> expr_use_visitor::Delegate<'tcx> for ExprUseDelegate<'tcx> {
         // If the type being assigned needs dropped, then the mutation counts as a borrow
         // since it is essentially doing `Drop::drop(&mut x); x = new_value;`.
         let ty = self.tcx.erase_regions(assignee_place.place.base_ty);
-        if ty.needs_infer() {
+        if ty.has_infer() {
             self.tcx.sess.delay_span_bug(
                 self.tcx.hir().span(assignee_place.hir_id),
                 &format!("inference variables in {ty}"),

compiler/rustc_hir_typeck/src/generator_interior/mod.rs

@@ -460,7 +460,7 @@ impl<'a, 'tcx> Visitor<'tcx> for InteriorVisitor<'a, 'tcx> {
                 // Avoid ICEs in needs_drop.
                 let ty = self.fcx.resolve_vars_if_possible(ty);
                 let ty = self.fcx.tcx.erase_regions(ty);
-                if ty.needs_infer() {
+                if ty.has_infer() {
                     self.fcx
                         .tcx
                         .sess

compiler/rustc_hir_typeck/src/method/probe.rs

@@ -2032,7 +2032,7 @@ impl<'tcx> Candidate<'tcx> {
                     // means they are safe to put into the
                     // `WhereClausePick`.
                     assert!(
-                        !trait_ref.skip_binder().substs.needs_infer()
+                        !trait_ref.skip_binder().substs.has_infer()
                             && !trait_ref.skip_binder().substs.has_placeholders()
                     );
 

compiler/rustc_hir_typeck/src/writeback.rs

@@ -133,7 +133,7 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> {
 
     fn write_ty_to_typeck_results(&mut self, hir_id: hir::HirId, ty: Ty<'tcx>) {
         debug!("write_ty_to_typeck_results({:?}, {:?})", hir_id, ty);
-        assert!(!ty.needs_infer() && !ty.has_placeholders() && !ty.has_free_regions());
+        assert!(!ty.has_infer() && !ty.has_placeholders() && !ty.has_free_regions());
         self.typeck_results.node_types_mut().insert(hir_id, ty);
     }
 
@@ -508,7 +508,7 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> {
             fcx_typeck_results.user_provided_types().items().map(|(local_id, c_ty)| {
                 let hir_id = hir::HirId { owner: common_hir_owner, local_id };
 
-                if cfg!(debug_assertions) && c_ty.needs_infer() {
+                if cfg!(debug_assertions) && c_ty.has_infer() {
                     span_bug!(
                         hir_id.to_span(self.fcx.tcx),
                         "writeback: `{:?}` has inference variables",
@@ -527,7 +527,7 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> {
 
         self.typeck_results.user_provided_sigs.extend(
             fcx_typeck_results.user_provided_sigs.items().map(|(&def_id, c_sig)| {
-                if cfg!(debug_assertions) && c_sig.needs_infer() {
+                if cfg!(debug_assertions) && c_sig.has_infer() {
                     span_bug!(
                         self.fcx.tcx.def_span(def_id),
                         "writeback: `{:?}` has inference variables",
@@ -618,7 +618,7 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> {
         if let Some(substs) = self.fcx.typeck_results.borrow().node_substs_opt(hir_id) {
             let substs = self.resolve(substs, &span);
             debug!("write_substs_to_tcx({:?}, {:?})", hir_id, substs);
-            assert!(!substs.needs_infer() && !substs.has_placeholders());
+            assert!(!substs.has_infer() && !substs.has_placeholders());
             self.typeck_results.node_substs_mut().insert(hir_id, substs);
         }
     }
@@ -693,7 +693,7 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> {
         {
             let hir_id = hir::HirId { owner: common_hir_owner, local_id };
 
-            if cfg!(debug_assertions) && container.needs_infer() {
+            if cfg!(debug_assertions) && container.has_infer() {
                 span_bug!(
                     hir_id.to_span(self.fcx.tcx),
                     "writeback: `{:?}` has inference variables",
@@ -711,7 +711,7 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> {
     {
         let mut resolver = Resolver::new(self.fcx, span, self.body);
         let x = x.fold_with(&mut resolver);
-        if cfg!(debug_assertions) && x.needs_infer() {
+        if cfg!(debug_assertions) && x.has_infer() {
             span_bug!(span.to_span(self.fcx.tcx), "writeback: `{:?}` has inference variables", x);
         }
 

compiler/rustc_infer/src/infer/canonical/canonicalizer.rs

@@ -564,12 +564,12 @@ impl<'cx, 'tcx> Canonicalizer<'cx, 'tcx> {
         let _inside_canonical_ctxt_guard = infcx.set_canonicalization_ctxt();
 
         let needs_canonical_flags = if canonicalize_region_mode.any() {
-            TypeFlags::NEEDS_INFER |
+            TypeFlags::HAS_INFER |
             TypeFlags::HAS_FREE_REGIONS | // `HAS_RE_PLACEHOLDER` implies `HAS_FREE_REGIONS`
             TypeFlags::HAS_TY_PLACEHOLDER |
             TypeFlags::HAS_CT_PLACEHOLDER
         } else {
-            TypeFlags::NEEDS_INFER
+            TypeFlags::HAS_INFER
                 | TypeFlags::HAS_RE_PLACEHOLDER
                 | TypeFlags::HAS_TY_PLACEHOLDER
                 | TypeFlags::HAS_CT_PLACEHOLDER
@@ -600,7 +600,7 @@ impl<'cx, 'tcx> Canonicalizer<'cx, 'tcx> {
         // Once we have canonicalized `out_value`, it should not
         // contain anything that ties it to this inference context
         // anymore.
-        debug_assert!(!out_value.needs_infer() && !out_value.has_placeholders());
+        debug_assert!(!out_value.has_infer() && !out_value.has_placeholders());
 
         let canonical_variables =
             tcx.mk_canonical_var_infos(&canonicalizer.universe_canonicalized_variables());

compiler/rustc_infer/src/infer/freshen.rs

@@ -127,7 +127,7 @@ impl<'a, 'tcx> TypeFolder<TyCtxt<'tcx>> for TypeFreshener<'a, 'tcx> {
 
     #[inline]
     fn fold_ty(&mut self, t: Ty<'tcx>) -> Ty<'tcx> {
-        if !t.needs_infer() && !t.has_erasable_regions() {
+        if !t.has_infer() && !t.has_erasable_regions() {
             t
         } else {
             match *t.kind() {

compiler/rustc_infer/src/infer/mod.rs

@@ -1327,7 +1327,7 @@ impl<'tcx> InferCtxt<'tcx> {
     where
         T: TypeFoldable<TyCtxt<'tcx>>,
     {
-        if !value.needs_infer() {
+        if !value.has_infer() {
             return value; // Avoid duplicated subst-folding.
         }
         let mut r = InferenceLiteralEraser { tcx: self.tcx };
@@ -1365,7 +1365,7 @@ impl<'tcx> InferCtxt<'tcx> {
     pub fn fully_resolve<T: TypeFoldable<TyCtxt<'tcx>>>(&self, value: T) -> FixupResult<'tcx, T> {
         let value = resolve::fully_resolve(self, value);
         assert!(
-            value.as_ref().map_or(true, |value| !value.needs_infer()),
+            value.as_ref().map_or(true, |value| !value.has_infer()),
             "`{value:?}` is not fully resolved"
         );
         value

compiler/rustc_infer/src/infer/outlives/obligations.rs

@@ -347,7 +347,7 @@ where
         let is_opaque = alias_ty.kind(self.tcx) == ty::Opaque;
         if approx_env_bounds.is_empty()
             && trait_bounds.is_empty()
-            && (alias_ty.needs_infer() || is_opaque)
+            && (alias_ty.has_infer() || is_opaque)
         {
             debug!("no declared bounds");
             let opt_variances = is_opaque.then(|| self.tcx.variances_of(alias_ty.def_id));

compiler/rustc_infer/src/infer/resolve.rs

@@ -213,7 +213,7 @@ impl<'a, 'tcx> FallibleTypeFolder<TyCtxt<'tcx>> for FullTypeResolver<'a, 'tcx> {
     }
 
     fn try_fold_ty(&mut self, t: Ty<'tcx>) -> Result<Ty<'tcx>, Self::Error> {
-        if !t.needs_infer() {
+        if !t.has_infer() {
             Ok(t) // micro-optimize -- if there is nothing in this type that this fold affects...
         } else {
             let t = self.infcx.shallow_resolve(t);
@@ -243,7 +243,7 @@ impl<'a, 'tcx> FallibleTypeFolder<TyCtxt<'tcx>> for FullTypeResolver<'a, 'tcx> {
     }
 
     fn try_fold_const(&mut self, c: ty::Const<'tcx>) -> Result<ty::Const<'tcx>, Self::Error> {
-        if !c.needs_infer() {
+        if !c.has_infer() {
             Ok(c) // micro-optimize -- if there is nothing in this const that this fold affects...
         } else {
             let c = self.infcx.shallow_resolve(c);

compiler/rustc_lint/src/enum_intrinsics_non_enums.rs

@@ -42,7 +42,7 @@ declare_lint_pass!(EnumIntrinsicsNonEnums => [ENUM_INTRINSICS_NON_ENUMS]);
 /// Returns `true` if we know for sure that the given type is not an enum. Note that for cases where
 /// the type is generic, we can't be certain if it will be an enum so we have to assume that it is.
 fn is_non_enum(t: Ty<'_>) -> bool {
-    !t.is_enum() && !t.needs_subst()
+    !t.is_enum() && !t.has_param()
 }
 
 fn enforce_mem_discriminant(

compiler/rustc_middle/src/ty/context.rs

@@ -215,7 +215,7 @@ impl<'tcx> CtxtInterners<'tcx> {
     ) -> Fingerprint {
         // It's impossible to hash inference variables (and will ICE), so we don't need to try to cache them.
         // Without incremental, we rarely stable-hash types, so let's not do it proactively.
-        if flags.flags.intersects(TypeFlags::NEEDS_INFER) || sess.opts.incremental.is_none() {
+        if flags.flags.intersects(TypeFlags::HAS_INFER) || sess.opts.incremental.is_none() {
             Fingerprint::ZERO
         } else {
             let mut hasher = StableHasher::new();

compiler/rustc_middle/src/ty/erase_regions.rs

@@ -40,7 +40,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for RegionEraserVisitor<'tcx> {
     }
 
     fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> {
-        if ty.needs_infer() { ty.super_fold_with(self) } else { self.tcx.erase_regions_ty(ty) }
+        if ty.has_infer() { ty.super_fold_with(self) } else { self.tcx.erase_regions_ty(ty) }
     }
 
     fn fold_binder<T>(&mut self, t: ty::Binder<'tcx, T>) -> ty::Binder<'tcx, T>