flatipc has no from_ipc_mut() method

[bunnie]

The Readme for flatipc gives these instructions to recover the original structure from a message:

xous-core/libs/flatipc/README.md

Lines 78 to 80 in 222f86d

	let Some(value) = IpcSimpleValue::from_ipc_mut(&mut message.data, message.signature) else {
	continue;
	}

However, I'm not able to find an implementation for from_ipc_mut. Or perhaps I'm not including the right trait to find it? I notice the example uses flatipc_derive:Ipc as the derive instead of flatipc::Ipc, but swapping that out doesn't seem to help.

Can you please clarify the server-side example?

[xobs]

I'm sorry, you're right, the trait got renamed to from_slice_mut() to be more inline with other Rust calls, and I didn't update the README.

Let me update that.

[bunnie]

I think it'd be also helpful to note that the signature field comes from the offset field in a memory message. Or at least I think it does? I'm not sure!

The example just says message.signature as the origin of the data, but no type is explicitly given for message and I don't find reference to signature in any of the legacy Xous APIs. But there's something buried in a proc macro that makes me think it might be offset but ideally we can call that out in the doc example.

[xobs]

I've updated the documentation in 0.1.2. Additionally, I've added Ipc::from_memory_message() that takes care of that for you.

See #581 and https://docs.rs/flatipc/latest/flatipc/