Added calls through pointers and references in template instantiation sequence diagram test case

src/sequence_diagram/visitor/translation_unit_visitor.cc

@@ -567,7 +567,9 @@ bool translation_unit_visitor::VisitCallExpr(clang::CallExpr *expr)
                     clang::dyn_cast_or_null<clang::CXXDependentScopeMemberExpr>(
                         function_call_expr->getCallee());
 
-                if (!dependent_member_callee->getBaseType().isNull()) {
+                if (is_callee_valid_template_specialization(
+                        dependent_member_callee)) {
+
                     const auto *primary_template =
                         dependent_member_callee->getBaseType()
                             ->getAs<clang::TemplateSpecializationType>()
@@ -715,6 +717,17 @@ bool translation_unit_visitor::VisitCallExpr(clang::CallExpr *expr)
     return true;
 }
 
+bool translation_unit_visitor::is_callee_valid_template_specialization(
+    const clang::CXXDependentScopeMemberExpr *dependent_member_callee) const
+{
+    return !dependent_member_callee->getBaseType().isNull() &&
+        dependent_member_callee->getBaseType()
+            ->getAs<clang::TemplateSpecializationType>() &&
+        !dependent_member_callee->getBaseType()
+             ->getAs<clang::TemplateSpecializationType>()
+             ->isPointerType();
+}
+
 bool translation_unit_visitor::is_smart_pointer(
     const clang::TemplateDecl *primary_template) const
 {

src/sequence_diagram/visitor/translation_unit_visitor.h

@@ -302,6 +302,10 @@ private:
 
     bool is_smart_pointer(const clang::TemplateDecl *primary_template) const;
 
+    bool is_callee_valid_template_specialization(
+        const clang::CXXDependentScopeMemberExpr *dependent_member_callee)
+        const;
+
     // Reference to the output diagram model
     clanguml::sequence_diagram::model::diagram &diagram_;