From 4d8273dea5d2f398c473dd4a9c8a178dadc5be4c Mon Sep 17 00:00:00 2001
From: Trevor Spiteri <tspiteri@ieee.org>
Date: Tue, 31 Mar 2020 21:37:13 +0200
Subject: [PATCH] expand vec![] to Vec::new()

---
 src/liballoc/macros.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/liballoc/macros.rs b/src/liballoc/macros.rs
index 422d3486f92..4bc0c3a079d 100644
--- a/src/liballoc/macros.rs
+++ b/src/liballoc/macros.rs
@@ -36,6 +36,9 @@
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow_internal_unstable(box_syntax)]
 macro_rules! vec {
+    () => (
+        $crate::vec::Vec::new()
+    );
     ($elem:expr; $n:expr) => (
         $crate::vec::from_elem($elem, $n)
     );
@@ -51,6 +54,9 @@ macro_rules! vec {
 // NB see the slice::hack module in slice.rs for more information
 #[cfg(test)]
 macro_rules! vec {
+    () => (
+        $crate::vec::Vec::new()
+    );
     ($elem:expr; $n:expr) => (
         $crate::vec::from_elem($elem, $n)
     );