liblog: use #[deriving(Copy)]

src/liblog/lib.rs

@@ -232,11 +232,9 @@ struct DefaultLogger {
 }
 
 /// Wraps the log level with fmt implementations.
-#[deriving(PartialEq, PartialOrd)]
+#[deriving(Copy, PartialEq, PartialOrd)]
 pub struct LogLevel(pub u32);
 
-impl Copy for LogLevel {}
-
 impl fmt::Show for LogLevel {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
         let LogLevel(level) = *self;
@@ -341,14 +339,13 @@ pub struct LogRecord<'a> {
 }
 
 #[doc(hidden)]
+#[deriving(Copy)]
 pub struct LogLocation {
     pub module_path: &'static str,
     pub file: &'static str,
     pub line: uint,
 }
 
-impl Copy for LogLocation {}
-
 /// Tests whether a given module's name is enabled for a particular level of
 /// logging. This is the second layer of defense about determining whether a
 /// module's log statement should be emitted or not.