1 files changed, 32 insertions, 0 deletions
diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..051a8c3
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,32 @@
+pub type Result<T> = std::result::Result<T, Error>;
+
+#[derive(Debug)]
+pub enum Error {
+    Io(std::io::Error),
+    Utf8(std::str::Utf8Error),
+    Opts(String),
+}
+
+impl std::error::Error for Error {}
+
+impl std::fmt::Display for Error {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Error::Io(e) => write!(f, "cat: {}", e),
+            Error::Utf8(e) => write!(f, "cat: {}", e),
+            Error::Opts(s) => write!(f, "cat: unrecognized option '{}'", s),
+        }
+    }
+}
+
+impl From<std::io::Error> for Error {
+    fn from(value: std::io::Error) -> Self {
+        Error::Io(value)
+    }
+}
+
+impl From<std::str::Utf8Error> for Error {
+    fn from(value: std::str::Utf8Error) -> Self {
+        Error::Utf8(value)
+    }
+}