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Allow overriding how scripted objects are converted to strings

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solves #26796

- ADD `String to_string()` method to Object which can be overriden by `String _to_string()` in scripts
- ADD `String to_string(r_valid)` method to ScriptInstance to allow langauges to control how scripted objects are converted to strings
- IMPLEMENT to_string for GDScriptInstance, VisualScriptInstance, and NativeScriptInstance
- ADD Documentation about `Object.to_string` and `Object._to_string`
- Changed `Variant::operator String` to use `obj->to_string()`
This commit is contained in:
Leonard Meagher 2019-04-09 22:07:40 -07:00
parent 5772f60f96
commit f7eb426e2e
14 changed files with 107 additions and 1 deletions
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12
core/object.cpp
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@ -956,6 +956,16 @@ void Object::notification(int p_notification, bool p_reversed) {
}
}
String Object::to_string() {
if (script_instance) {
bool valid;
String ret = script_instance->to_string(&valid);
if (valid)
return ret;
}
return "[" + get_class() + ":" + itos(get_instance_id()) + "]";
}
void Object::_changed_callback(Object *p_changed, const char *p_prop) {
}
@ -1682,6 +1692,7 @@ void Object::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_property_list"), &Object::_get_property_list_bind);
ClassDB::bind_method(D_METHOD("get_method_list"), &Object::_get_method_list_bind);
ClassDB::bind_method(D_METHOD("notification", "what", "reversed"), &Object::notification, DEFVAL(false));
ClassDB::bind_method(D_METHOD("to_string"), &Object::to_string);
ClassDB::bind_method(D_METHOD("get_instance_id"), &Object::get_instance_id);
ClassDB::bind_method(D_METHOD("set_script", "script"), &Object::set_script);
@ -1768,6 +1779,7 @@ void Object::_bind_methods() {
#endif
BIND_VMETHOD(MethodInfo("_init"));
BIND_VMETHOD(MethodInfo(Variant::STRING, "_to_string"));
BIND_CONSTANT(NOTIFICATION_POSTINITIALIZE);
BIND_CONSTANT(NOTIFICATION_PREDELETE);