Merge pull request #189 from dtolnay/sealed

Add Sealed supertrait to private AsDynError trait
dtolnay · Sep 13, 2022 · 12acbc5 · 12acbc5
2 parents c6b8fcf + 85d812f
commit 12acbc5
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Showing 2 changed files with 14 additions and 1 deletion.
diff --git a/src/aserror.rs b/src/aserror.rs
@@ -1,7 +1,8 @@
+use self::private::Sealed;
 use std::error::Error;
 use std::panic::UnwindSafe;
 
-pub trait AsDynError<'a> {
+pub trait AsDynError<'a>: Sealed {
     fn as_dyn_error(&self) -> &(dyn Error + 'a);
 }
 
@@ -39,3 +40,14 @@ impl<'a> AsDynError<'a> for dyn Error + Send + Sync + UnwindSafe + 'a {
         self
     }
 }
+
+mod private {
+    use super::*;
+
+    pub trait Sealed {}
+    impl<'a, T: Error + 'a> Sealed for T {}
+    impl<'a> Sealed for dyn Error + 'a {}
+    impl<'a> Sealed for dyn Error + Send + 'a {}
+    impl<'a> Sealed for dyn Error + Send + Sync + 'a {}
+    impl<'a> Sealed for dyn Error + Send + Sync + UnwindSafe + 'a {}
+}
diff --git a/src/lib.rs b/src/lib.rs
@@ -206,6 +206,7 @@
     clippy::doc_markdown,
     clippy::module_name_repetitions,
     clippy::return_self_not_must_use,
+    clippy::wildcard_imports,
 )]
 
 mod aserror;