Disable copying of model diagrams

src/class_diagram/model/diagram.h

@@ -29,6 +29,13 @@ namespace clanguml::class_diagram::model {
 
 class diagram : public clanguml::common::model::diagram {
 public:
+    diagram() = default;
+
+    diagram(const diagram &) = delete;
+    diagram(diagram &&) = default;
+    diagram &operator=(const diagram &) = delete;
+    diagram &operator=(diagram &&) = default;
+
     const std::vector<class_> classes() const;
 
     const std::vector<enum_> enums() const;

src/package_diagram/model/diagram.h

@@ -34,7 +34,6 @@ public:
 
     diagram(const diagram &) = delete;
     diagram(diagram &&) = default;
-
     diagram &operator=(const diagram &) = delete;
     diagram &operator=(diagram &&) = default;
 

src/package_diagram/model/package.h

@@ -39,8 +39,8 @@ public:
 
     package(const package &) = delete;
     package(package &&) = default;
-
     package &operator=(const package &) = delete;
+    package &operator=(package &&) = default;
 
     std::string full_name(bool relative) const override;
 

src/sequence_diagram/model/diagram.h

@@ -27,6 +27,13 @@ namespace clanguml::sequence_diagram::model {
 
 class diagram : public clanguml::common::model::diagram {
 public:
+    diagram() = default;
+
+    diagram(const diagram &) = delete;
+    diagram(diagram &&) = default;
+    diagram &operator=(const diagram &) = delete;
+    diagram &operator=(diagram &&) = default;
+
     std::string to_alias(const std::string &full_name) const;
 
     bool started{false};