Is there a way to store traits in context for libraries to have internal context?

[ChocolateLoverRaj]

Here is what I want to do, which can be done in JavaScript:

import { createContext, FC, useContext, useState } from 'react';

import './style.css';

export const App: FC<{ name: string }> = ({ name }) => {
  const [state, setState] = useState(0);

  return (
    <LibraryComponent
      state={{ get: () => state, set: (value) => setState(value) }}
    />
  );
};

interface GetSet<T> {
  get: () => T;
  set: (value: T) => void;
}

const LibraryContext = createContext(undefined);

const LibraryComponent: FC<{ state: GetSet<number> }> = ({ state }) => {
  return (
    <LibraryContext.Provider value={state}>
      <LibrarySubComponent />
      <LibrarySubComponent />
    </LibraryContext.Provider>
  );
};

const LibrarySubComponent: FC = () => {
  const state = useContext(LibraryContext);

  return (
    <>
      <p>{state.get()}</p>
      <button onClick={() => state.set(state.get() + 1)}>Inc</button>
    </>
  );
};

https://stackblitz.com/edit/stackblitz-starters-rhhxds?description=React%20%20%20TypeScript%20starter%20project&file=src%2FApp.tsx&title=React%20Starter

This is what I tried:

pub trait GetSet<T>: Clone {
    fn get(&self) -> T;
    fn set(&mut self, value: T);
}

thread_local! {
    pub static CONTEXT: Context<Option<Box<dyn GetSet<i32>>>> = create_context(None.into());
}

error[E0038]: the trait `GetSet` cannot be made into an object
  --> src/lib.rs:35:44
   |
35 |     pub static CONTEXT: Context<Option<Box<dyn GetSet<i32>>>> = create_context(None.into());
   |                                            ^^^^^^^^^^^^^^^ `GetSet` cannot be made into an object
   |
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
  --> src/lib.rs:29:22
   |
29 | pub trait GetSet<T>: Clone {
   |           ------     ^^^^^ ...because it requires `Self: Sized`
   |           |
   |           this trait cannot be made into an object...

[yishn]

This is a Rust question, not a wasm-react one. Only so-called object-safe traits can be used as trait objects (e.g. Box<dyn Trait>). Unfortunately, the Clone trait is not object-safe.