From 3ae2d21c12a1fbe909f72a96b012d7092c5419e4 Mon Sep 17 00:00:00 2001
From: Waffle <waffle.lapkin@gmail.com>
Date: Thu, 9 Apr 2020 11:03:57 +0300
Subject: [PATCH] simplify `vec!` macro

Simplify `vec!` macro by replacing 2 following branches:
- `($($x:expr),*) => (...)`
- `($($x:expr,)*) => (...)`
with one:
- `($($x:expr),* $(,)?) => (...)`
---
 src/liballoc/macros.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/liballoc/macros.rs b/src/liballoc/macros.rs
index 4bc0c3a079d..4a613b92ce8 100644
--- a/src/liballoc/macros.rs
+++ b/src/liballoc/macros.rs
@@ -42,10 +42,9 @@ macro_rules! vec {
     ($elem:expr; $n:expr) => (
         $crate::vec::from_elem($elem, $n)
     );
-    ($($x:expr),*) => (
+    ($($x:expr),* $(,)?) => (
         <[_]>::into_vec(box [$($x),*])
     );
-    ($($x:expr,)*) => ($crate::vec![$($x),*])
 }
 
 // HACK(japaric): with cfg(test) the inherent `[T]::into_vec` method, which is