From fa8ee06ee5456a70edffd768e907f790a7060757 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Sun, 7 Jun 2020 10:53:57 -0700
Subject: [PATCH] Generate more concise code for empty quote

---
 src/lib.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index e2869e3..2977e47 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -472,6 +472,9 @@ pub mod spanned;
 /// ```
 #[macro_export]
 macro_rules! quote {
+    () => {
+        $crate::__private::TokenStream::new()
+    };
     ($($tt:tt)*) => {{
         let mut _s = $crate::__private::TokenStream::new();
         $crate::quote_each_token!(_s $($tt)*);
@@ -577,6 +580,10 @@ macro_rules! quote {
 /// placed appropriately by the compiler.
 #[macro_export]
 macro_rules! quote_spanned {
+    ($span:expr=>) => {{
+        let _: $crate::__private::Span = $span;
+        $crate::__private::TokenStream::new()
+    }};
     ($span:expr=> $($tt:tt)*) => {{
         let mut _s = $crate::__private::TokenStream::new();
         let _span: $crate::__private::Span = $span;