Add workaround for tokio-rs/tokio#5502

src/setup/core.rs

@@ -20,6 +20,17 @@ pub trait AddGeneric<X: ToArtifact> {
 }
 
 macro_rules! add_generic {
+  // Workaround for https://github.com/tokio-rs/tokio/issues/5502
+  () => (
+    #[async_trait(?Send)]
+    impl<SR, L, B, Rs, As> AddGeneric<()> for Setup<SR, L, B, Rs, As>
+    {
+      async fn add_generic(&self, (): ()) -> Result<(StoringLogger, (), bool), (StoringLogger, Box<dyn Error>)>
+      {
+        Ok((StoringLogger::default(), (), false))
+      }
+    }
+  );
   ( $($name:ident)* ) => (
     #[async_trait(?Send)]
     #[allow(non_snake_case)]
@@ -202,3 +213,19 @@ impl<SR: SymbolRunner, L, B> SymbolRunner for RegularSetupCore<SR, L, B> {
     result
   }
 }
+
+#[cfg(test)]
+mod test {
+  use super::super::setup::Setup;
+  use super::AddGeneric;
+  use crate::async_utils::run;
+  use crate::DrySymbolRunner;
+
+  #[test]
+  fn empty() {
+    let setup: Setup<_, (), (), (), ()> = Setup::new(DrySymbolRunner);
+    run(async {
+      assert!(setup.add_generic(()).await.is_ok());
+    })
+  }
+}

src/setup/mod.rs

@@ -1,6 +1,6 @@
 mod core;
-mod util;
 mod symbol_runner;
+mod util;
 pub use symbol_runner::{
   DelayingSymbolRunner, DrySymbolRunner, InitializingSymbolRunner, ReportingSymbolRunner,
   SymbolRunner,

src/setup/setup.rs

@@ -27,6 +27,14 @@ struct SetupInner<CORE, Rs, As> {
 #[derive(Debug)]
 pub struct Setup<SR, L, B, Rs, As>(Rc<SetupInner<RegularSetupCore<SR, L, B>, Rs, As>>);
 
+impl<SR, L, B, Rs, As> Setup<SR, L, B, Rs, As> {
+  pub fn new(symbol_runner: SR) -> Self {
+    Self(Rc::new(SetupInner {
+      core: RegularSetupCore::new(symbol_runner),
+      resources: RefCell::default(),
+    }))
+  }
+}
 impl<L: 'static, B: 'static, SR: 'static, Rs: Hash + Eq + 'static, As: 'static>
   Setup<SR, L, B, Rs, As>
 {
@@ -111,13 +119,7 @@ impl<SR, LOG> SetupFacade<SR, LOG> {
 
 impl<L, B, As, SR, LOG, Rs: Hash + Eq> SetupFacade<SR, LOG, L, B, Rs, As> {
   pub fn new_with(symbol_runner: SR, logger: LOG) -> Self {
-    Self(
-      logger,
-      Setup(Rc::new(SetupInner {
-        core: RegularSetupCore::new(symbol_runner),
-        resources: RefCell::default(),
-      })),
-    )
+    Self(logger, Setup::new(symbol_runner))
   }
 }