Strategy Design Pattern and RTIC

[Michał Hanusek]

Hello!
I am a newbie in Embedded Rust and RTIC framework.
I would like to implement a design pattern - Strategy or classic pointer to the function.

I created this trait:

trait OperationStrategy 
{
    fn operate(&mut self);
}

and main struct

struct Card<T: OperationStrategy> {
    strategy: T,
}

impl<T: OperationStrategy> Card<T> {
    pub fn new(strategy: T) -> Self {
        Self { strategy }
    }

    pub fn operate(&mut self) {
        self.strategy.operate();
    }
}

Rust Playground:
https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=3a24cfddcbbdb9f150209686c606e7ec

Embedded Rust (no_std) hasn't Box, Arc and Mutex.
I have a problem with adding the struct Card to Shared.

#[shared]
struct Shared {}

How to fix it?
Please Help

My github repo with code.

My platform: STM32F103

[Michał Hanusek]

I implemented two solutions.
https://github.com/hanusek/rtic-strategy-pattern/tree/solution1-enum
https://github.com/hanusek/rtic-strategy-pattern/tree/solution2-fnptr
What do you think?

[Henrik Tjäder]

If these two solutions work for you, great! We discussed this briefly during previous week's meeting, and some opinions came out of it, but nobody had tried this pattern so not much to draw from it.

If there is something else to do here, please reopen