chore: Reintroduce preloading components for entt storage

Author: Kelwan

ecsact/entt/wrapper/core.hh

@@ -373,4 +373,21 @@ inline auto clear_component(ecsact_registry_id registry_id) -> void {
 	reg.clear<ecsact::entt::component_removed<C>>();
 }
 
+template<typename C>
+inline auto init_registry_with_component(ecsact_registry_id registry_id
+) -> void {
+	using namespace ecsact::entt;
+
+	auto& reg = ecsact::entt::get_registry(registry_id);
+
+	reg.template storage<C>();
+	reg.template storage<component_added<C>>();
+	reg.template storage<component_changed<C>>();
+	reg.template storage<component_removed<C>>();
+
+	if constexpr(!std::is_empty_v<C>) {
+		reg.storage<detail::beforechange_storage<C>>();
+	}
+}
+
 } // namespace ecsact::entt::wrapper::core

rt_entt_codegen/core/BUILD.bazel

@@ -13,6 +13,7 @@ cc_library(
 _CORE_CODEGEN_METHODS = {
     "execute_systems": [],
     "create_registry": [],
+    "init_registry_storage": [],
     "events": [],
     "print_sys_exec": [
         "//rt_entt_codegen/shared:comps_with_caps",

rt_entt_codegen/core/core.hh

@@ -21,6 +21,11 @@ auto print_create_registry( //
 	const ecsact_entt_details& details
 ) -> void;
 
+auto print_init_registry_storage( //
+	ecsact::codegen_plugin_context&                     ctx,
+	const ecsact::rt_entt_codegen::ecsact_entt_details& details
+) -> void;
+
 auto print_execute_system_like_template_specializations( //
 	codegen_plugin_context&    ctx,
 	const ecsact_entt_details& details

rt_entt_codegen/core/create_registry.cc

@@ -27,5 +27,7 @@ auto ecsact::rt_entt_codegen::core::print_create_registry( //
 		}
 	}
 
+	ctx.write("ecsact_init_registry_storage(registry_id);\n");
+
 	ctx.write("\nreturn registry_id;");
 }

rt_entt_codegen/core/init_registry_storage.cc

@@ -0,0 +1,29 @@
+#include "core.hh"
+
+#include "ecsact/lang-support/lang-cc.hh"
+#include "rt_entt_codegen/shared/util.hh"
+
+auto ecsact::rt_entt_codegen::core::print_init_registry_storage(
+	ecsact::codegen_plugin_context&                     ctx,
+	const ecsact::rt_entt_codegen::ecsact_entt_details& details
+) -> void {
+	using ecsact::cc_lang_support::cpp_identifier;
+	using ecsact::meta::decl_full_name;
+	using ecsact::rt_entt_codegen::util::method_printer;
+
+	auto printer = //
+		method_printer{ctx, "ecsact_init_registry_storage"}
+			.parameter("ecsact_registry_id", "registry_id")
+			.return_type("void");
+
+	for(auto comp_id : details.all_components) {
+		auto cpp_comp_name = cpp_identifier(decl_full_name(comp_id));
+
+		ctx.write(
+			"ecsact::entt::wrapper::core::init_registry_with_component<",
+			cpp_comp_name,
+			">(registry_id)"
+		);
+		ctx.write(";\n");
+	}
+}

rt_entt_codegen/rt_entt_codegen.cc

@@ -204,6 +204,7 @@ void ecsact_codegen_plugin(
 
 		core::print_check_error_template_specializations(ctx, details);
 		core::print_execute_system_like_template_specializations(ctx, details);
+		core::print_init_registry_storage(ctx, details);
 		core::print_create_registry(ctx, details);
 		core::print_trigger_ecsact_events_minimal(ctx, details);
 		core::print_trigger_ecsact_events_all(ctx, details);