From b2ce19bd3c52d708ed8035f8291812e39c25b80a Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Sun, 31 Dec 2017 15:53:29 -0800
Subject: [PATCH] Update to master `quote`

---
 crates/wasm-bindgen-macro/src/lib.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/crates/wasm-bindgen-macro/src/lib.rs b/crates/wasm-bindgen-macro/src/lib.rs
index 2b4fa39a..0bafa39f 100644
--- a/crates/wasm-bindgen-macro/src/lib.rs
+++ b/crates/wasm-bindgen-macro/src/lib.rs
@@ -11,7 +11,7 @@ extern crate wasm_bindgen_shared;
 use std::sync::atomic::*;
 
 use proc_macro::TokenStream;
-use proc_macro2::{Literal, Span};
+use proc_macro2::{Literal, Span, TokenNode, Delimiter, TokenTree};
 use quote::{Tokens, ToTokens};
 
 mod ast;
@@ -403,7 +403,11 @@ impl ToTokens for Receiver {
                 } else {
                     syn::Ident::from("borrow").to_tokens(tokens);
                 }
-                tokens.append_delimited("(", Default::default(), |_| ());
+                tokens.append(TokenTree {
+                    span: Default::default(),
+                    kind: TokenNode::Group(Delimiter::Parenthesis,
+                                           proc_macro2::TokenStream::empty()),
+                });
                 syn::token::Dot::default().to_tokens(tokens);
                 name.to_tokens(tokens);
             }