Auto merge of #62684 - petrochenkov:scopevisit, r=davidtwco

resolve: Improve candidate search for unresolved macro suggestions

Use same scope visiting machinery for both collecting suggestion candidates and actually resolving the names.

The PR is better read in per-commit fashion with whitespace changes ignored (the first commit in particular moves some code around).

This should be the last pre-requisite for #62086.
r? @davidtwco

src/librustc/hir/def.rs

@@ -398,4 +398,12 @@ impl<Id> Res<Id> {
             Res::Err => Res::Err,
         }
     }
+
+    pub fn macro_kind(self) -> Option<MacroKind> {
+        match self {
+            Res::Def(DefKind::Macro(kind), _) => Some(kind),
+            Res::NonMacroAttr(..) => Some(MacroKind::Attr),
+            _ => None,
+        }
+    }
 }

src/librustc_resolve/build_reduced_graph.rs

@@ -3,11 +3,11 @@
 //! Here we build the "reduced graph": the graph of the module tree without
 //! any imports resolved.
 
-use crate::macros::{InvocationData, ParentScope, LegacyScope};
+use crate::macros::{InvocationData, LegacyScope};
 use crate::resolve_imports::ImportDirective;
 use crate::resolve_imports::ImportDirectiveSubclass::{self, GlobImport, SingleImport};
 use crate::{Module, ModuleData, ModuleKind, NameBinding, NameBindingKind, Segment, ToNameBinding};
-use crate::{ModuleOrUniformRoot, PerNS, Resolver, ResolverArenas, ExternPreludeEntry};
+use crate::{ModuleOrUniformRoot, ParentScope, PerNS, Resolver, ResolverArenas, ExternPreludeEntry};
 use crate::Namespace::{self, TypeNS, ValueNS, MacroNS};
 use crate::{resolve_error, resolve_struct_error, ResolutionError, Determinacy};