Fix zero prio tasks when all async tasks have default (no) arguments

examples/rp2040_local_i2c_init/Cargo.toml

@@ -10,7 +10,7 @@ edition = "2021"
 
 [dependencies.rtic]
 path = "../../rtic"
-version = "=2.0.0-alpha.1"
+version = "=2.0.0-alpha.2"
 features = ["thumbv6-backend"]
 
 [dependencies.rtic-monotonics]

examples/stm32f3_blinky/Cargo.toml

@@ -9,7 +9,7 @@ version = "0.1.0"
 
 [dependencies.rtic]
 path = "../../rtic"
-version = "=2.0.0-alpha.1"
+version = "=2.0.0-alpha.2"
 features = ["thumbv7-backend"]
 
 [dependencies.rtic-monotonics]

rtic-macros/Cargo.toml

@@ -22,7 +22,7 @@ name = "rtic-macros"
 readme = "../README.md"
 repository = "https://github.com/rtic-rs/rtic"
 
-version = "2.0.0-alpha.0"
+version = "2.0.0-alpha.2"
 
 [lib]
 proc-macro = true

rtic-macros/src/syntax/ast.rs

@@ -242,7 +242,7 @@ pub struct SoftwareTaskArgs {
 impl Default for SoftwareTaskArgs {
     fn default() -> Self {
         Self {
-            priority: 1,
+            priority: 0,
             local_resources: LocalResources::new(),
             shared_resources: SharedResources::new(),
         }

rtic-macros/ui/task-no-prio.rs

@@ -0,0 +1,19 @@
+#![no_main]
+
+#[rtic_macros::mock_app(device = mock)]
+mod app {
+    #[shared]
+    struct Shared {}
+
+    #[local]
+    struct Local {}
+
+    #[init]
+    fn init(_: init::Context) -> (Shared, Local) {}
+
+    #[idle]
+    fn idle(_: idle::Context) -> ! {}
+
+    #[task]
+    async fn task1(_: task1::Context) {}
+}

rtic-macros/ui/task-no-prio.stderr

@@ -0,0 +1,5 @@
+error: Async task "task1" has priority 0, but `#[idle]` is defined. 0-priority async tasks are only allowed if there is no `#[idle]`.
+  --> ui/task-no-prio.rs:18:14
+   |
+18 |     async fn task1(_: task1::Context) {}
+   |              ^^^^^

rtic/Cargo.toml

@@ -22,7 +22,7 @@ name = "rtic"
 readme = "../README.md"
 repository = "https://github.com/rtic-rs/rtic"
 
-version = "2.0.0-alpha.1"
+version = "2.0.0-alpha.2"
 
 [package.metadata.docs.rs]
 features = ["rtic-macros/test-template"]
@@ -36,7 +36,7 @@ bare-metal = "1.0.0"
 #portable-atomic = { version = "0.3.19" }
 atomic-polyfill = "1"
 rtic-monotonics = { path = "../rtic-monotonics", version = "1.0.0-alpha.1", optional = true }
-rtic-macros = { path = "../rtic-macros", version = "2.0.0-alpha.0" }
+rtic-macros = { path = "../rtic-macros", version = "2.0.0-alpha.2" }
 rtic-core = "1"
 critical-section = "1"
 

rtic/examples/async-delay.rs

@@ -34,15 +34,6 @@ mod app {
         (Shared {}, Local {})
     }
 
-    #[idle]
-    fn idle(_: idle::Context) -> ! {
-        // debug::exit(debug::EXIT_SUCCESS);
-        loop {
-            // hprintln!("idle");
-            cortex_m::asm::wfi(); // put the MCU in sleep mode until interrupt occurs
-        }
-    }
-
     #[task]
     async fn foo(_cx: foo::Context) {
         hprintln!("hello from foo");

rtic/examples/spawn_loop.rs

@@ -25,6 +25,7 @@ mod app {
 
         (Shared {}, Local {})
     }
+
     #[idle]
     fn idle(_: idle::Context) -> ! {
         for _ in 0..3 {
@@ -35,7 +36,7 @@ mod app {
         loop {}
     }
 
-    #[task]
+    #[task(priority = 1)]
     async fn foo(_: foo::Context) {
         hprintln!("foo");
     }

rtic/ui/extern-interrupt-not-enough.rs

@@ -13,6 +13,6 @@ mod app {
         (Shared {}, Local {})
     }
 
-    #[task]
+    #[task(priority = 1)]
     async fn a(_: a::Context) {}
 }