libimagrt: Replace error code with code generator macro

libimagrt/Cargo.toml

@@ -21,3 +21,6 @@ path = "../libimagstorestdhook"
 [dependencies.libimagutil]
 path = "../libimagutil"
 
+[dependencies.libimagerror]
+path = "../libimagerror"
+

libimagrt/src/error.rs

@@ -4,60 +4,11 @@ use std::fmt::Formatter;
 use std::fmt::Error as FmtError;
 use std::io::Error as IOError;
 
-#[derive(Debug, PartialEq, Clone, Copy)]
-pub enum RuntimeErrorKind {
-    Instantiate,
-    IOError,
-    ProcessExitFailure,
-
-    // more?
-}
-
-#[derive(Debug)]
-pub struct RuntimeError {
-    kind: RuntimeErrorKind,
-    cause: Option<Box<Error>>,
-}
-
-impl RuntimeError {
-
-    pub fn new(kind: RuntimeErrorKind, cause: Option<Box<Error>>) -> RuntimeError {
-        RuntimeError {
-            kind: kind,
-            cause: cause,
-        }
-    }
-
-}
-
-fn runtime_error_kind_as_str(e: &RuntimeErrorKind) -> &'static str {
-    match *e {
-        RuntimeErrorKind::Instantiate          => "Could not instantiate",
-        RuntimeErrorKind::IOError              => "IO Error",
-        RuntimeErrorKind::ProcessExitFailure   => "Process exited with failure",
-    }
-}
-
-impl Display for RuntimeError {
-
-    fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
-        try!(write!(fmt, "{}", runtime_error_kind_as_str(&self.kind)));
-        Ok(())
-    }
-
-}
-
-impl Error for RuntimeError {
-
-    fn description(&self) -> &str {
-        runtime_error_kind_as_str(&self.kind)
-    }
-
-    fn cause(&self) -> Option<&Error> {
-        self.cause.as_ref().map(|e| &**e)
-    }
-
-}
+generate_error_types!(RuntimeError, RuntimeErrorKind,
+    Instantiate        => "Could not instantiate",
+    IOError            => "IO Error",
+    ProcessExitFailure => "Process exited with failure"
+);
 
 impl From<IOError> for RuntimeError {
 

libimagrt/src/lib.rs

@@ -26,6 +26,7 @@ extern crate toml;
 extern crate libimagstore;
 extern crate libimagstorestdhook;
 extern crate libimagutil;
+#[macro_use] extern crate libimagerror;
 
 mod configuration;
 mod logger;