libimagcounter: Replace error code with code generator macro

libimagcounter/Cargo.toml

@@ -11,3 +11,6 @@ semver = "0.2"
 [dependencies.libimagstore]
 path = "../libimagstore"
 
+[dependencies.libimagerror]
+path = "../libimagerror"
+

libimagcounter/src/error.rs

@@ -2,85 +2,10 @@ use std::error::Error;
 use std::fmt::Error as FmtError;
 use std::fmt::{Display, Formatter};
 
-/**
- * Kind of error
- */
-#[derive(Clone, Copy, Debug, PartialEq)]
-pub enum CounterErrorKind {
-    StoreReadError,
-    StoreWriteError,
-    HeaderTypeError,
-    HeaderFieldMissingError,
-}
-
-fn counter_error_type_as_str(e: &CounterErrorKind) -> &'static str {
-    match *e {
-        CounterErrorKind::StoreReadError  => "Store read error",
-        CounterErrorKind::StoreWriteError => "Store write error",
-        CounterErrorKind::HeaderTypeError => "Header type error",
-        CounterErrorKind::HeaderFieldMissingError => "Header field missing error",
-    }
-}
-
-impl Display for CounterErrorKind {
-
-    fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
-        try!(write!(fmt, "{}", counter_error_type_as_str(self)));
-        Ok(())
-    }
-
-}
-
-/**
- * Store error type
- */
-#[derive(Debug)]
-pub struct CounterError {
-    err_type: CounterErrorKind,
-    cause: Option<Box<Error>>,
-}
-
-impl CounterError {
-
-    /**
-     * Build a new CounterError from an CounterErrorKind, optionally with cause
-     */
-    pub fn new(errtype: CounterErrorKind, cause: Option<Box<Error>>)
-        -> CounterError
-        {
-            CounterError {
-                err_type: errtype,
-                cause: cause,
-            }
-        }
-
-    /**
-     * Get the error type of this CounterError
-     */
-    pub fn err_type(&self) -> CounterErrorKind {
-        self.err_type
-    }
-
-}
-
-impl Display for CounterError {
-
-    fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
-        try!(write!(fmt, "[{}]", counter_error_type_as_str(&self.err_type)));
-        Ok(())
-    }
-
-}
-
-impl Error for CounterError {
-
-    fn description(&self) -> &str {
-        counter_error_type_as_str(&self.err_type)
-    }
-
-    fn cause(&self) -> Option<&Error> {
-        self.cause.as_ref().map(|e| &**e)
-    }
-
-}
+generate_error_types!(CounterError, CounterErrorKind,
+    StoreReadError          => "Store read error",
+    StoreWriteError         => "Store write error",
+    HeaderTypeError         => "Header type error",
+    HeaderFieldMissingError => "Header field missing error"
+);
 

libimagcounter/src/lib.rs

@@ -17,6 +17,7 @@ extern crate toml;
 #[macro_use] extern crate semver;
 
 #[macro_use] extern crate libimagstore;
+#[macro_use] extern crate libimagerror;
 
 module_entry_path_mod!("counter", "0.1.0");