data: fixed indexer coverage

* revised the check if a declaration is implicit. this affects whether or not the reference to the decl should be recorded.

src/lib_parser/data/parser/cxx/ASTVisitor.cpp

@@ -1076,15 +1076,35 @@ void ASTVisitor::RecordTypeRef(
 	}
 }
 
+bool ASTVisitor::isImpliciit(clang::Decl* d) const
+{
+	if (!d)
+	{
+		return false;
+	}
+
+	if (clang::ClassTemplateSpecializationDecl* ctsd = clang::dyn_cast_or_null<clang::ClassTemplateSpecializationDecl>(d))
+	{
+		if (!ctsd->isExplicitSpecialization())
+		{
+			return true;
+		}
+	}
+
+	return isImpliciit(clang::dyn_cast_or_null<clang::Decl>(d->getDeclContext()));
+}
+
 void ASTVisitor::RecordDeclRef(
-        clang::NamedDecl *d,
+        clang::NamedDecl* d,
         clang::SourceLocation beginLoc,
         RefType refType,
         SymbolType symbolType)
 {
-	if ((!d) ||
-		(d->isImplicit() && !isLocatedInProjectFile(beginLoc)) ||
-		(!d->isImplicit() && !isLocatedInUnparsedProjectFile(beginLoc)))
+	bool isImplicit = isImpliciit(d);
+
+	if (!d ||
+		(isImplicit && !isLocatedInProjectFile(beginLoc)) ||
+		(!isImplicit && !isLocatedInUnparsedProjectFile(beginLoc)))
 	{
 		return;
 	}

src/lib_parser/data/parser/cxx/ASTVisitor.h

@@ -287,6 +287,8 @@ private:
 		RefType refType,
 		SymbolType symbolType = ST_Max);
 
+	bool isImpliciit(clang::Decl* d) const;
+
     void RecordDeclRef(
             clang::NamedDecl *d,
             clang::SourceLocation beginLoc,

src/lib_parser/data/parser/cxx/name_resolver/CxxTypeNameResolver.cpp

@@ -116,7 +116,7 @@ std::shared_ptr<DataType> CxxTypeNameResolver::typeToDataType(const clang::Type*
 				CxxDeclNameResolver declNameResolver(tagType->getDecl(), getIgnoredContextDecls());
 				typeNameHerarchy = declNameResolver.getDeclNameHierarchy();
 			}
-			else // specialization of a template template parameter (no concrete class)
+			else // specialization of a template template parameter (no concrete class) important, may help: has no underlying decl!
 			{
 				const clang::TemplateSpecializationType* templateSpecializationType = type->getAs<clang::TemplateSpecializationType>();
 				CxxDeclNameResolver declNameResolver(templateSpecializationType->getTemplateName().getAsTemplateDecl(), getIgnoredContextDecls());