From d5ea92526549e40ff43b34f25fe6bee4418a3186 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Fri, 15 May 2020 09:12:41 -0700
Subject: [PATCH] Implement Default for proc_macro::TokenStream

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

diff --git a/src/libproc_macro/lib.rs b/src/libproc_macro/lib.rs
index 31bc61263abe6..b6544341fa95b 100644
--- a/src/libproc_macro/lib.rs
+++ b/src/libproc_macro/lib.rs
@@ -158,6 +158,13 @@ impl fmt::Debug for TokenStream {
     }
 }
 
+#[stable(feature = "proc_macro_token_stream_default", since = "1.45.0")]
+impl Default for TokenStream {
+    fn default() -> Self {
+        TokenStream::new()
+    }
+}
+
 #[unstable(feature = "proc_macro_quote", issue = "54722")]
 pub use quote::{quote, quote_span};