From d1aa29ba3282662518e3b30e6db6f7af2b906356 Mon Sep 17 00:00:00 2001
From: Seiichi Uchida <seuchida@gmail.com>
Date: Tue, 26 Dec 2017 22:11:18 +0900
Subject: Do not panic on interpolated token inside quote macro

---
 src/libsyntax/ext/quote.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/libsyntax')

diff --git a/src/libsyntax/ext/quote.rs b/src/libsyntax/ext/quote.rs
index 426dde4f2a7..6141c38ab14 100644
--- a/src/libsyntax/ext/quote.rs
+++ b/src/libsyntax/ext/quote.rs
@@ -669,7 +669,11 @@ fn expr_mk_token(cx: &ExtCtxt, sp: Span, tok: &token::Token) -> P<ast::Expr> {
                                 vec![mk_name(cx, sp, ast::Ident::with_empty_ctxt(ident))]);
         }
 
-        token::Interpolated(_) => panic!("quote! with interpolated token"),
+        token::Interpolated(_) => {
+            cx.span_err(sp, "quote! with interpolated token");
+            // Use dummy name.
+            "Interpolated"
+        }
 
         token::Eq           => "Eq",
         token::Lt           => "Lt",
-- 
cgit 1.4.1-3-g733a5