C++: fix support for nested anonymous classes

A member of nested anonymous class should be visible as a member of
enclosing class(if there is no declaration of this nested anonymous
class).

Fix:
* marking
* find usage
* follow symbol
* completion

Task-number: QTCREATORBUG-10876
Task-number: QTCREATORBUG-11170
Change-Id: If5b4d198e9075f2a8aa899ae59190f2c05f7b1ff
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Przemyslaw Gorszkowski <pgorszkowski@gmail.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/libs/cplusplus/LookupContext.cpp

@@ -680,6 +680,15 @@ void ClassOrNamespace::lookup_helper(const Name *name, ClassOrNamespace *binding
 
         foreach (ClassOrNamespace *u, binding->usings())
             lookup_helper(name, u, result, processed, binding->_templateId);
+
+        Anonymouses::const_iterator cit = binding->_anonymouses.begin();
+        Anonymouses::const_iterator citEnd = binding->_anonymouses.end();
+        for (; cit != citEnd; ++cit) {
+            const AnonymousNameId *anonymousNameId = cit.key();
+            ClassOrNamespace *a = cit.value();
+            if (!binding->_declaredAnonymouses.contains(anonymousNameId))
+                lookup_helper(name, a, result, processed, binding->_templateId);
+        }
     }
 }
 
@@ -1578,8 +1587,12 @@ bool CreateBindings::visit(Declaration *decl)
                 }
             }
         }
+    } else if (Class *clazz = decl->type()->asClassType()) {
+        if (const Name *name = clazz->name()) {
+            if (const AnonymousNameId *anonymousNameId = name->asAnonymousNameId())
+                _currentClassOrNamespace->_declaredAnonymouses.insert(anonymousNameId);
+        }
     }
-
     return false;
 }
 

src/libs/cplusplus/LookupContext.h

@@ -93,6 +93,7 @@ public:
 private:
     typedef std::map<const Name *, ClassOrNamespace *, Name::Compare> Table;
     typedef std::map<const TemplateNameId *, ClassOrNamespace *, TemplateNameId::Compare> TemplateNameIdTable;
+    typedef QHash<const AnonymousNameId *, ClassOrNamespace *> Anonymouses;
 
     /// \internal
     void flush();
@@ -138,7 +139,8 @@ private:
     QSharedPointer<Control> _control;
     TemplateNameIdTable _specializations;
     QMap<const TemplateNameId *, ClassOrNamespace *> _instantiations;
-    QHash<const AnonymousNameId *, ClassOrNamespace *> _anonymouses;
+    Anonymouses _anonymouses;
+    QSet<const AnonymousNameId *> _declaredAnonymouses;
 
     QHash<Internal::FullyQualifiedName, Symbol *> *_scopeLookupCache;