From 5c7677e5fa134b60c7d4c29d3643125901a31fb8 Mon Sep 17 00:00:00 2001
From: Tom Smeding <tom.smeding@gmail.com>
Date: Sun, 13 Sep 2020 17:58:51 +0200
Subject: WIP rust client

---
 rust/src/error.rs | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 rust/src/error.rs

(limited to 'rust/src/error.rs')

diff --git a/rust/src/error.rs b/rust/src/error.rs
new file mode 100644
index 0000000..f25bc5d
--- /dev/null
+++ b/rust/src/error.rs
@@ -0,0 +1,27 @@
+use std::io;
+
+pub trait IntoIOError {
+    fn ioerr(self) -> io::Error;
+    fn perror(self, parent: io::Error) -> io::Error;
+}
+
+// This impl bound is taken directly from the io::Error::new function.
+impl<E: Into<Box<dyn std::error::Error + Send + Sync>>> IntoIOError for E {
+    fn ioerr(self) -> io::Error {
+        io::Error::new(io::ErrorKind::Other, self)
+    }
+
+    fn perror(self, parent: io::Error) -> io::Error {
+        io::Error::new(parent.kind(), format!("{}: {}", self.into(), parent))
+    }
+}
+
+pub trait IntoIOResult<T> {
+    fn iores(self) -> io::Result<T>;
+}
+
+impl<T, E: IntoIOError> IntoIOResult<T> for Result<T, E> {
+    fn iores(self) -> io::Result<T> {
+        self.map_err(|e| e.ioerr())
+    }
+}
-- 
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