Use Error & ErrorKind pair instead of simple enums

Each plugin should define its own errors with a respective variant
in the main ErrorKind of frippy.
A new procedural macro was added to reduce the boilerplate required
for new error system.
It can be used by deriving "Error" and adding a name for the Error
via the "error" attribute.

So far non of the plugins except for Url and Factoids
use their own errors yet.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/plugins/factoids/utils.rs b/src/plugins/factoids/utils.rs
index 009b46b..70ac8a7 100644
--- a/src/plugins/factoids/utils.rs
+++ b/src/plugins/factoids/utils.rs
@@ -11,7 +11,11 @@ use self::LuaError::RuntimeError;
 pub fn download(_: &Lua, url: String) -> Result<String, LuaError> {
     match utils::download(&url, Some(1024)) {
         Ok(v) => Ok(v),
-        Err(e) => Err(RuntimeError(format!("Failed to download {} - {}", url, e.to_string()))),
+        Err(e) => Err(RuntimeError(format!(
+            "Failed to download {} - {}",
+            url,
+            e.to_string()
+        ))),
     }
 }