1 files changed, 81 insertions, 0 deletions
diff --git a/third_party/rust/anyhow/src/wrapper.rs b/third_party/rust/anyhow/src/wrapper.rs
new file mode 100644
index 0000000000..5f18a50313
--- /dev/null
+++ b/third_party/rust/anyhow/src/wrapper.rs
@@ -0,0 +1,81 @@
+use crate::StdError;
+use core::fmt::{self, Debug, Display};
+
+#[cfg(backtrace)]
+use std::any::Demand;
+
+#[repr(transparent)]
+pub struct MessageError<M>(pub M);
+
+impl<M> Debug for MessageError<M>
+where
+    M: Display + Debug,
+{
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        Debug::fmt(&self.0, f)
+    }
+}
+
+impl<M> Display for MessageError<M>
+where
+    M: Display + Debug,
+{
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        Display::fmt(&self.0, f)
+    }
+}
+
+impl<M> StdError for MessageError<M> where M: Display + Debug + 'static {}
+
+#[repr(transparent)]
+pub struct DisplayError<M>(pub M);
+
+impl<M> Debug for DisplayError<M>
+where
+    M: Display,
+{
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        Display::fmt(&self.0, f)
+    }
+}
+
+impl<M> Display for DisplayError<M>
+where
+    M: Display,
+{
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        Display::fmt(&self.0, f)
+    }
+}
+
+impl<M> StdError for DisplayError<M> where M: Display + 'static {}
+
+#[cfg(feature = "std")]
+#[repr(transparent)]
+pub struct BoxedError(pub Box<dyn StdError + Send + Sync>);
+
+#[cfg(feature = "std")]
+impl Debug for BoxedError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        Debug::fmt(&self.0, f)
+    }
+}
+
+#[cfg(feature = "std")]
+impl Display for BoxedError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        Display::fmt(&self.0, f)
+    }
+}
+
+#[cfg(feature = "std")]
+impl StdError for BoxedError {
+    fn source(&self) -> Option<&(dyn StdError + 'static)> {
+        self.0.source()
+    }
+
+    #[cfg(backtrace)]
+    fn provide<'a>(&'a self, demand: &mut Demand<'a>) {
+        self.0.provide(demand);
+    }
+}