From 2d383d48b7f728f4bff732e2f017cacf0e914ba8 Mon Sep 17 00:00:00 2001
From: gifnksm <makoto.nksm+github@gmail.com>
Date: Mon, 3 Nov 2014 20:03:15 +0900
Subject: [PATCH] Implements `std::error::Error` for `ErrCode`.

This change supports "Error interoperation".
See rust-lang/rfcs#201, rust-lang/rust#17747.
---
 src/ffi/err.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/ffi/err.rs b/src/ffi/err.rs
index 2a2caba879..cef0913b12 100644
--- a/src/ffi/err.rs
+++ b/src/ffi/err.rs
@@ -1,5 +1,5 @@
 use std::c_str::CString;
-use std::fmt;
+use std::{error, fmt, str};
 use libc::{c_int,c_char};
 
 #[allow(non_camel_case_types)]
@@ -148,3 +148,9 @@ impl fmt::Show for ErrCode {
         }
     }
 }
+
+impl error::Error for ErrCode {
+    fn description(&self) -> &str {
+        unsafe { str::raw::c_str_to_static_slice(curl_easy_strerror(*self)) }
+    }
+}