Implement Display for the Error enum

2 files changed, 12 insertions, 0 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c4e1d97..833930d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 # Unreleased
 - Add the `Password` dialog box.
 - Add the `Zenity` backend.
+- Implement `std::fmt::Display` for the `Error` enum.
 
 # v0.1.0 (2019-01-08)
 - Initial release with the `Input`, `Message` and `Question` dialog boxes and
diff --git a/src/error.rs b/src/error.rs
index 6e32155..6872382 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,6 +1,7 @@
 // Copyright (C) 2019 Robin Krahl <robin.krahl@ireas.org>
 // SPDX-License-Identifier: MIT
 
+use std::fmt;
 use std::io;
 use std::process;
 use std::result;
@@ -21,6 +22,16 @@ pub enum Error {
     Utf8Error(str::Utf8Error),
 }
 
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
+            Error::Error(ref s) => write!(f, "Error: {}", s),
+            Error::IoError(ref e) => write!(f, "I/O error: {}", e),
+            Error::Utf8Error(ref e) => write!(f, "UTF-8 error: {}", e),
+        }
+    }
+}
+
 impl From<&str> for Error {
     fn from(string: &str) -> Error {
         Error::Error(string.to_string())