Added element_types diagram filter (#131)

src/config/config.h

@@ -61,6 +61,12 @@ struct filter {
 
     std::vector<std::string> elements;
 
+    // E.g.:
+    //   - class
+    //   - enum
+    //   - concept
+    std::vector<std::string> element_types;
+
     // E.g.:
     //   - inheritance/extension
     //   - dependency

src/config/yaml_decoders.cc

@@ -301,6 +301,10 @@ template <> struct convert<filter> {
         if (node["elements"])
             rhs.elements = node["elements"].as<decltype(rhs.elements)>();
 
+        if (node["element_types"])
+            rhs.element_types =
+                node["element_types"].as<decltype(rhs.element_types)>();
+
         if (node["access"])
             rhs.access = node["access"].as<decltype(rhs.access)>();
 

src/config/yaml_emitters.cc

@@ -60,6 +60,8 @@ YAML::Emitter &operator<<(YAML::Emitter &out, const filter &f)
         out << YAML::Key << "dependencies" << YAML::Value << f.dependencies;
     if (!f.elements.empty())
         out << YAML::Key << "elements" << YAML::Value << f.elements;
+    if (!f.element_types.empty())
+        out << YAML::Key << "element_types" << YAML::Value << f.element_types;
     if (!f.paths.empty())
         out << YAML::Key << "paths" << YAML::Value << f.paths;
     if (!f.relationships.empty())