C++: improve support for anonymous classes

Fix:
* highlighting
* find usages
* follow symbol
* code completion

Task-number: QTCREATORBUG-6497
Task-number: QTCREATORBUG-8963
Task-number: QTCREATORBUG-3610
Task-number: QTCREATORBUG-7579

Change-Id: I3dcaf1c515d0199c3e6bee72284fbb40064686ee
Reviewed-by: Petar Perisin <petar.perisin@gmail.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/libs/cplusplus/LookupContext.cpp

@@ -60,7 +60,7 @@ static void addNames(const Name *name, QList<const Name *> *names, bool addAllNa
     else if (const QualifiedNameId *q = name->asQualifiedNameId()) {
         addNames(q->base(), names);
         addNames(q->name(), names, addAllNames);
-    } else if (addAllNames || name->isNameId() || name->isTemplateNameId()) {
+    } else if (addAllNames || name->isNameId() || name->isTemplateNameId() || name->isAnonymousNameId()) {
         names->append(name);
     }
 }
@@ -716,7 +716,7 @@ ClassOrNamespace *ClassOrNamespace::lookupType_helper(const Name *name,
     } else if (! processed->contains(this)) {
         processed->insert(this);
 
-        if (name->isNameId() || name->isTemplateNameId()) {
+        if (name->isNameId() || name->isTemplateNameId() || name->isAnonymousNameId()) {
             flush();
 
             foreach (Symbol *s, symbols()) {
@@ -798,10 +798,26 @@ ClassOrNamespace *ClassOrNamespace::findSpecializationWithPointer(const Template
 ClassOrNamespace *ClassOrNamespace::nestedType(const Name *name, ClassOrNamespace *origin)
 {
     Q_ASSERT(name != 0);
-    Q_ASSERT(name->isNameId() || name->isTemplateNameId());
+    Q_ASSERT(name->isNameId() || name->isTemplateNameId() || name->isAnonymousNameId());
 
     const_cast<ClassOrNamespace *>(this)->flush();
 
+    const AnonymousNameId *anonymousNameId = name->asAnonymousNameId();
+    if (anonymousNameId) {
+        QHash<const AnonymousNameId *, ClassOrNamespace *>::const_iterator cit
+                = _anonymouses.find(anonymousNameId);
+        if (cit != _anonymouses.end()) {
+            return cit.value();
+        } else {
+            ClassOrNamespace *newAnonymous = _factory->allocClassOrNamespace(this);
+#ifdef DEBUG_LOOKUP
+            newAnonymous->_name = anonymousNameId;
+#endif // DEBUG_LOOKUP
+            _anonymouses[anonymousNameId] = newAnonymous;
+            return newAnonymous;
+        }
+    }
+
     Table::const_iterator it = _classOrNamespaces.find(name);
     if (it == _classOrNamespaces.end())
         return 0;
@@ -1201,7 +1217,7 @@ ClassOrNamespace *ClassOrNamespace::findOrCreateType(const Name *name, ClassOrNa
 
         return findOrCreateType(q->base(), origin)->findOrCreateType(q->name(), origin);
 
-    } else if (name->isNameId() || name->isTemplateNameId()) {
+    } else if (name->isNameId() || name->isTemplateNameId() || name->isAnonymousNameId()) {
         ClassOrNamespace *e = nestedType(name, origin);
 
         if (! e) {
@@ -1470,7 +1486,7 @@ bool CreateBindings::visit(NamespaceAlias *a)
         return false;
 
     } else if (ClassOrNamespace *e = _currentClassOrNamespace->lookupType(a->namespaceName())) {
-        if (a->name()->isNameId() || a->name()->isTemplateNameId())
+        if (a->name()->isNameId() || a->name()->isTemplateNameId() || a->name()->isAnonymousNameId())
             _currentClassOrNamespace->addNestedType(a->name(), e);
 
     } else if (false) {

src/libs/cplusplus/LookupContext.h

@@ -131,6 +131,7 @@ private:
     QSharedPointer<Control> _control;
     TemplateNameIdTable _specializations;
     QMap<const TemplateNameId *, ClassOrNamespace *> _instantiations;
+    QHash<const AnonymousNameId *, ClassOrNamespace *> _anonymouses;
 
     QHash<Internal::FullyQualifiedName, Symbol *> *_scopeLookupCache;
 

src/libs/cplusplus/NamePrettyPrinter.cpp

@@ -268,3 +268,8 @@ void NamePrettyPrinter::visit(const SelectorNameId *name)
         }
     }
 }
+
+void NamePrettyPrinter::visit(const AnonymousNameId *name)
+{
+    _name = QString(QLatin1String("Anonymous:%1")).arg(name->classTokenIndex());
+}

src/libs/cplusplus/NamePrettyPrinter.h

@@ -57,6 +57,7 @@ protected:
     virtual void visit(const ConversionNameId *name);
     virtual void visit(const QualifiedNameId *name);
     virtual void visit(const SelectorNameId *name);
+    virtual void visit(const AnonymousNameId *name);
 
 private:
     const Overview *_overview;