rtic/examples/t-cfg-resources.rs

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

use panic_halt as _;

#[cfg(rustc_is_nightly)]
mod example {

    #[rtfm::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 {}
        }
    };
}