dcharkes
commented
1 year ago .ref is an extension method, not an instance method: https://api.dart.dev/stable/3.0.5/dart-ffi/StructPointer/ref.html
Even methods that are instance methods in dart:ffi are often prohibited to be used from dynamic. The reason is that we need to "see" the dart:ffi uses at compile time because it uses a special compilation.
Why do you want to use dynamic? Why not use final testClass = createClass() (or var testClass = ...) and have static typing without having to write the type?
millie-molly
I have initialize function that retrun a class ( object ). I am trying to get a return value as a dynamic how can I make it?
here is an example.
define function typedef CreateClassFileC = Pointer Function(); // cannot define cast type. like Pointer
typedef CreateClassFileDart = Pointer Function();
Pointer createClass() {
final createClass = dll.lookup<NativeFunction>('Dll_createClass');
final createClassFunc = createClass.asFunction();
final resp = createClassFunc();
return resp;
}
call function Pointer testClass= createClass();
OR
dynamic testClass= createClass();
now, I am trying to call a class's function. testClass.callFunc(); // how to call dynamic funtion's method? I got no instance error. // I got error "NoSuchMethodError: Class 'Pointer' has no instance getter 'ref'(callFunc)."
// or was called on null error.
Or can you tell me how to get return value as a class ( object ) from a function?