Make macro comma optional

Author: blogscot

macros/src/lib.rs

@@ -1,10 +1,12 @@
+#![feature(macro_at_most_once_rep)]
+
 #[macro_export]
 macro_rules! hashmap {
   () => {
     HashMap::new()
   };
 
-  ( $( $key:expr => $value:expr $(,)* ), *) => {
+  ( $( $key:expr => $value:expr $(,)? ), *) => {
     {
       let mut hm = HashMap::new();
       $(

macros/tests/macros.rs

@@ -1,3 +1,5 @@
+#![feature(macro_at_most_once_rep)]
+
 #[macro_use]
 extern crate macros;