roll back to compiler version "nightly-2022-07-10"

bare_metal/src/board/peripherals.rs

@@ -21,8 +21,8 @@ use super::{
 /// Abstraction over the platform specific hardware instantiation
 /// TODO: Move to a better place
 pub trait Peripherals {
-    fn get_keyboard(&self) -> impl Keyboard + '_;
-    fn get_front_panel(&self) -> impl FrontPanel + '_;
+    fn get_keyboard<'a>(&'a self) -> KeyboardAvrDriver<'a>;
+    fn get_front_panel<'a>(&'a self) -> FrontPanelAvrHardware<'a>;
     fn get_screen_buffer(&self) -> ScreenBuffer;
 }
 
@@ -55,12 +55,12 @@ impl PeripheralsAvrHardware {
 }
 
 impl Peripherals for PeripheralsAvrHardware {
-    fn get_keyboard(&self) -> impl Keyboard + '_ {
+    fn get_keyboard<'a>(&'a self) -> KeyboardAvrDriver<'a> {
         let keyboard = KeyboardAvrDriver::new(&self.output_expander, &self.input_expander);
         keyboard
     }
 
-    fn get_front_panel(&self) -> impl FrontPanel + '_ {
+    fn get_front_panel<'a>(&'a self) -> FrontPanelAvrHardware<'a> {
         // Leds from the frontal panel
         let front_panel = FrontPanelAvrHardware::new(&self.output_expander);
         front_panel

bare_metal/src/main.rs

@@ -5,10 +5,12 @@
 #![feature(exclusive_range_pattern)]
 #![allow(non_snake_case)] // remove this line when possible
 #![allow(dead_code)]
-#![feature(lang_items)] // Necessary to eh_personality and to run "cargo fix" on the code.
-#![feature(return_position_impl_trait_in_trait)] // used in the peripherals factory abstraction
+#![feature(lang_items)]
+// Necessary to eh_personality and to run "cargo fix" on the code.
+//#![feature(return_position_impl_trait_in_trait)] // used in the peripherals factory abstraction
 #![feature(cell_update)] // used to update davigation state // TODO: check if this feature is stable enough
-                         //
+#![feature(let_else)]
+//
 extern crate alloc;
 #[lang = "eh_personality"]
 extern "C" fn eh_personality() {}

rust-toolchain.toml

@@ -1,5 +1,5 @@
 [toolchain]
-channel = "nightly-2023-06-21"
+channel = "nightly-2022-07-10"
 components = ["rust-docs", "cargo", "rustfmt", "clippy", "rust-src" ]
 targets = ["avr-unknown-gnu-atmega328"]
 profile = "minimal"