implement IkarusPropertySource and switch to cppbase::overloaded

Signed-off-by: Folling <mail@folling.io>

src/objects/properties/property_source.cpp

@@ -0,0 +1,46 @@
+#include "property_source.hpp"
+
+#include <boost/functional/overloaded_function.hpp>
+
+#include <objects/blueprint.hpp>
+
+IkarusPropertySource::IkarusPropertySource(Data data):
+    data{data} {}
+
+IkarusPropertySource * ikarus_property_source_create_blueprint(IkarusBlueprint * blueprint) {
+    return new IkarusPropertySource{blueprint};
+}
+
+IkarusPropertySource * ikarus_property_source_create_entity(IkarusEntity * entity) {
+    return new IkarusPropertySource{entity};
+}
+
+void ikarus_property_source_visit(
+    struct IkarusPropertySource * property_source,
+    void (*blueprint_visitor)(struct IkarusBlueprint *, void *),
+    void (*entity_visitor)(struct IkarusEntity *, void *),
+    void * user_data
+) {
+    boost::variant2::visit(
+        boost::make_overloaded_function(
+            [blueprint_visitor, user_data](IkarusBlueprint * blueprint) { blueprint_visitor(blueprint, user_data); },
+            [entity_visitor, user_data](IkarusEntity * entity) { entity_visitor(entity, user_data); }
+        ),
+        property_source->data
+    );
+}
+
+void ikarus_property_source_visit_const(
+    struct IkarusPropertySource const * property_source,
+    void (*blueprint_visitor)(struct IkarusBlueprint const *, void *),
+    void (*entity_visitor)(struct IkarusEntity const *, void *),
+    void * user_data
+) {
+    boost::variant2::visit(
+        boost::make_overloaded_function(
+            [blueprint_visitor, user_data](IkarusBlueprint const * blueprint) { blueprint_visitor(blueprint, user_data); },
+            [entity_visitor, user_data](IkarusEntity const * entity) { entity_visitor(entity, user_data); }
+        ),
+        property_source->data
+    );
+}

src/objects/properties/property_source.hpp

@@ -1,16 +1,15 @@
 #pragma once
 
-#include <variant>
+#include <boost/variant2.hpp>
 
 #include <ikarus/objects/properties/property_source.h>
 
 struct IkarusPropertySource {
 public:
-    using Data = std::variant<IkarusBlueprint *, IkarusEntity *>;
+    using Data = boost::variant2::variant<IkarusBlueprint *, IkarusEntity *>;
 
 public:
-    inline explicit IkarusPropertySource(Data data):
-        _data{data} {}
+    explicit IkarusPropertySource(Data data);
 
     IkarusPropertySource(IkarusPropertySource const&) = default;
     IkarusPropertySource(IkarusPropertySource&&) = default;
@@ -18,13 +17,8 @@ public:
     IkarusPropertySource& operator=(IkarusPropertySource const&) = default;
     IkarusPropertySource& operator=(IkarusPropertySource&&) = default;
 
-    ~IkarusPropertySource() = default;
+    virtual ~IkarusPropertySource() = default;
 
 public:
-    [[nodiscard]] inline Data const& get_data() const {
-        return _data;
-    }
-
-private:
-    std::variant<IkarusBlueprint *, IkarusEntity *> _data;
+    Data data;
 };

src/objects/properties/toggle_property.hpp

@@ -2,7 +2,7 @@
 
 #include <objects/properties/property.hpp>
 
-struct IkarusToggleProperty final : IkarusProperty {
+struct IkarusToggleProperty : IkarusProperty {
 public:
     IkarusToggleProperty(struct IkarusProject * project, IkarusId id);
 };