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Add automatic generation of getters and setters to GDCLASS and a helper macro for using them #1401

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Add automatic generation of getters and setters to GDCLASS and a helper macro for using them #1401

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8f007c6
Add auto generated getters and setters to GDCLASS and add macro to ob…
blaster23 Mar 4, 2024
3c7f444
Fix naming
blaster23 Mar 4, 2024
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15 changes: 15 additions & 0 deletions include/godot_cpp/classes/wrapped.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -149,6 +149,15 @@ struct EngineClassRegistration {
}
};

template <typename>
struct MemberPointerTraits;

template <typename Result, typename Object>
struct MemberPointerTraits<Result (Object::*)> {
using result_type = Result;
using object_type = Object;
};

} // namespace internal

} // namespace godot
Expand Down Expand Up @@ -369,6 +378,12 @@ public:
_gde_binding_reference_callback, \
}; \
\
template <auto T> \
typename internal::MemberPointerTraits<decltype(T)>::result_type _get_data_member() { return (this->*T); } \
\
template <auto T> \
void _set_data_member(typename internal::MemberPointerTraits<decltype(T)>::result_type t) { (this->*T) = t; } \
\
private:

// Don't use this for your classes, use GDCLASS() instead.
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8 changes: 8 additions & 0 deletions include/godot_cpp/core/object.hpp
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Expand Up @@ -51,6 +51,14 @@
#define ADD_GROUP(m_name, m_prefix) godot::ClassDB::add_property_group(get_class_static(), m_name, m_prefix)
#define ADD_SUBGROUP(m_name, m_prefix) godot::ClassDB::add_property_subgroup(get_class_static(), m_name, m_prefix)
#define ADD_PROPERTY(m_property, m_setter, m_getter) godot::ClassDB::add_property(get_class_static(), m_property, m_setter, m_getter)
#define AUTO_ADD_PROPERTY(p_property, p_method) \
{ \
auto get = &godot::internal::MemberPointerTraits<decltype(p_method)>::object_type::_get_data_member<p_method>; \
auto set = &godot::internal::MemberPointerTraits<decltype(p_method)>::object_type::_set_data_member<p_method>; \
ClassDB::bind_method(D_METHOD(StringName("get") + StringName(&#p_method[1])), get); \
ClassDB::bind_method(D_METHOD(StringName("set") + StringName(&#p_method[1])), set); \
ClassDB::add_property(get_class_static(), p_property, StringName("set") + StringName(&#p_method[1]), StringName("get") + StringName(&#p_method[1])); \
}
#define ADD_PROPERTYI(m_property, m_setter, m_getter, m_index) godot::ClassDB::add_property(get_class_static(), m_property, m_setter, m_getter, m_index)

namespace godot {
Expand Down