# Open Meeting 2024-05-29

## IoMem abstraction

https://lore.kernel.org/rust-for-linux/ZkzptG6fJx-MJ_6s@pollux/

struct Io<T>(*mut T);

impl Io<[u8]> {
    fn try_readb(offset: usize) -> Result<u8> {
        ...
    }
}

impl<N: usize> Io<[u8; N]> {
    fn readb(offset: usize) -> u8 {
        build_assert!(offset + 1 <= N);
        ...
    }
}

Field projection:

#[repr(C)]
struct MyDevice {
    foo: u32,
    bar: u32,
}

let io: &Io<MyDevice> = ...;
project!(io => foo).read()

Code generation / proc macros...

## syn

Debian/Federa is happy to provide source package of syn at a fixed location

Distros suggest to use cargo to find the local source packages

Probably use `cargo metadata` to find out the path.

##