libimagentrylist: Replace error code with code generator macro

libimagentrylist/Cargo.toml

@@ -11,3 +11,6 @@ toml = "0.1.25"
 [dependencies.libimagstore]
 path = "../libimagstore"
 
+[dependencies.libimagerror]
+path = "../libimagerror"
+

libimagentrylist/src/error.rs

@@ -2,83 +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 ListErrorKind {
-    FormatError,
-    EntryError,
-    IterationError,
-    CLIError,
-}
-
-fn counter_error_type_as_str(err: &ListErrorKind) -> &'static str{
-    match *err {
-        ListErrorKind::FormatError    => "FormatError",
-        ListErrorKind::EntryError     => "EntryError",
-        ListErrorKind::IterationError => "IterationError",
-        ListErrorKind::CLIError       => "No CLI subcommand for listing entries",
-    }
-}
-
-impl Display for ListErrorKind {
-
-    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 ListError {
-    err_type: ListErrorKind,
-    cause: Option<Box<Error>>,
-}
-
-impl ListError {
-
-    /**
-     * Build a new ListError from an ListErrorKind, optionally with cause
-     */
-    pub fn new(errtype: ListErrorKind, cause: Option<Box<Error>>) -> ListError {
-            ListError {
-                err_type: errtype,
-                cause: cause,
-            }
-        }
-
-    /**
-     * Get the error type of this ListError
-     */
-    pub fn err_type(&self) -> ListErrorKind {
-        self.err_type
-    }
-
-}
-
-impl Display for ListError {
-
-    fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
-        try!(write!(fmt, "[{}]", counter_error_type_as_str(&self.err_type)));
-        Ok(())
-    }
-
-}
-
-impl Error for ListError {
-
-    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!(ListError, ListErrorKind,
+    FormatError    => "FormatError",
+    EntryError     => "EntryError",
+    IterationError => "IterationError",
+    CLIError       => "No CLI subcommand for listing entries"
+);
 

libimagentrylist/src/lib.rs

@@ -19,6 +19,7 @@ extern crate clap;
 extern crate toml;
 
 extern crate libimagstore;
+#[macro_use] extern crate libimagerror;
 
 pub mod cli;
 pub mod error;