Issue 21886. Make enums available outside of the defining library.

pkg/analyzer/lib/src/generated/resolver.dart

Index: pkg/analyzer/lib/src/generated/resolver.dart
diff --git a/pkg/analyzer/lib/src/generated/resolver.dart b/pkg/analyzer/lib/src/generated/resolver.dart
index c272ed1969f1ca6dad2030c4ab6a70ccb03073ad..bd25f67db5e44bb1c1c3c810ebe3b29987200d7c 100644
--- a/pkg/analyzer/lib/src/generated/resolver.dart
+++ b/pkg/analyzer/lib/src/generated/resolver.dart
@@ -10223,6 +10223,9 @@ class NamespaceBuilder {
     for (PropertyAccessorElement element in compilationUnit.accessors) {
       _addIfPublic(definedNames, element);
     }
+    for (ClassElement element in compilationUnit.enums) {
+      _addIfPublic(definedNames, element);
+    }
     for (FunctionElement element in compilationUnit.functions) {
       _addIfPublic(definedNames, element);
     }
@@ -11342,6 +11345,13 @@ class ResolverVisitor extends ScopedVisitor {
   }
 
   /**
+   * Prepares this [ResolverVisitor] to using it for incremental resolution.
+   */
+  void initForIncrementalResolution() {
+    _overrideManager.enterScope();
+  }
+
+  /**
    * If it is appropriate to do so, override the current type of the static and propagated elements
    * associated with the given expression with the given type. Generally speaking, it is appropriate
    * if the given type is more specific than the current type.
@@ -11588,13 +11598,6 @@ class ResolverVisitor extends ScopedVisitor {
     return null;
   }
 
-  /**
-   * Prepares this [ResolverVisitor] to using it for incremental resolution.
-   */
-  void initForIncrementalResolution() {
-    _overrideManager.enterScope();
-  }
-
   @override
   Object visitCompilationUnit(CompilationUnit node) {
     //