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

4 files changed, 26 insertions, 2 deletions

diff --git a/rtic-macros/Cargo.toml b/rtic-macros/Cargo.toml
index 71358c0..f7e6c7b 100644
--- a/rtic-macros/Cargo.toml
+++ b/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
diff --git a/rtic-macros/src/syntax/ast.rs b/rtic-macros/src/syntax/ast.rs
index d5510cb..3f4956c 100644
--- a/rtic-macros/src/syntax/ast.rs
+++ b/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(),
         }
diff --git a/rtic-macros/ui/task-no-prio.rs b/rtic-macros/ui/task-no-prio.rs
new file mode 100644
index 0000000..8327777
--- /dev/null
+++ b/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) {}
+}
diff --git a/rtic-macros/ui/task-no-prio.stderr b/rtic-macros/ui/task-no-prio.stderr
new file mode 100644
index 0000000..4ff97ec
--- /dev/null
+++ b/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) {}
+   |              ^^^^^