rtic/examples/t-cfg-resources.rs

//! [compile-pass] check that `#[cfg]` attributes applied on resources work
//!
#![no_main]
#![no_std]

use panic_halt as _;

#[rtic::app(device = lm3s6965)]
const APP: () = {
    struct Resources {
        // A resource
        #[init(0)]
        shared: u32,

        // A conditionally compiled resource behind feature_x
        #[cfg(feature = "feature_x")]
        x: u32,

        dummy: (),
    }

    #[init]
    fn init(_: init::Context) -> init::LateResources {
        init::LateResources {
            // The feature needs to be applied everywhere x is defined or used
            #[cfg(feature = "feature_x")]
            x: 0,
            dummy: (), // dummy such that we have at least one late resource
        }
    }

    #[idle]
    fn idle(_cx: idle::Context) -> ! {
        loop {
            cortex_m::asm::nop();
        }
    }
};