Add GDExtension support to Script

* Ability to create script languages from GDExtension
* Some additions to gdnative_extension.h to make this happen
* Moved the GDExtension binder to core

This now allows creating scripting languages from GDExtension, with the same ease as if it was a module. It replaces the old PluginScript from Godot 3.x.
Warning: GodotCPP will need to be updated to support this (it may be a bit of work as ScriptInstance needs to be created over there again).

1 files changed, 16 insertions, 0 deletions

diff --git a/core/core_bind.cpp b/core/core_bind.cpp
index 7150459d84..8b060b09f9 100644
--- a/core/core_bind.cpp
+++ b/core/core_bind.cpp
@@ -2296,6 +2296,18 @@ Vector<String> Engine::get_singleton_list() const {
 	return ret;
 }
 
+void Engine::register_script_language(ScriptLanguage *p_language) {
+	ScriptServer::register_language(p_language);
+}
+
+int Engine::get_script_language_count() {
+	return ScriptServer::get_language_count();
+}
+
+ScriptLanguage *Engine::get_script_language(int p_index) const {
+	return ScriptServer::get_language(p_index);
+}
+
 void Engine::set_editor_hint(bool p_enabled) {
 	::Engine::get_singleton()->set_editor_hint(p_enabled);
 }
@@ -2347,6 +2359,10 @@ void Engine::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("unregister_singleton", "name"), &Engine::unregister_singleton);
 	ClassDB::bind_method(D_METHOD("get_singleton_list"), &Engine::get_singleton_list);
 
+	ClassDB::bind_method(D_METHOD("register_script_language", "language"), &Engine::register_script_language);
+	ClassDB::bind_method(D_METHOD("get_script_language_count"), &Engine::get_script_language_count);
+	ClassDB::bind_method(D_METHOD("get_script_language", "index"), &Engine::get_script_language);
+
 	ClassDB::bind_method(D_METHOD("is_editor_hint"), &Engine::is_editor_hint);
 
 	ClassDB::bind_method(D_METHOD("set_print_error_messages", "enabled"), &Engine::set_print_error_messages);