From 09cdeb4bc9c9d8ed1cd24eef17799bfc84880792 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Thu, 5 May 2022 21:55:18 -0700
Subject: [PATCH] Handle "Show invisible delimeters (within comments)" change
 in rustc

---
 src/lib.rs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index 19742dc..5f4da61 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -323,7 +323,17 @@ fn try_expand(input: TokenStream, mode: Macro) -> Result<TokenStream> {
 
 fn lit_indoc(token: TokenTree, mode: Macro) -> Result<Literal> {
     let repr = token.to_string();
-    let repr = repr.trim();
+    let mut repr = repr.trim();
+
+    // https://github.com/rust-lang/rust/pull/96682
+    let invisible_delimiter_prefix = "/*«*/";
+    let invisible_delimiter_suffix = "/*»*/";
+    if repr.starts_with(invisible_delimiter_prefix) && repr.ends_with(invisible_delimiter_suffix) {
+        repr = repr
+            [invisible_delimiter_prefix.len()..repr.len() - invisible_delimiter_suffix.len()]
+            .trim();
+    }
+
     let is_string = repr.starts_with('"') || repr.starts_with('r');
     let is_byte_string = repr.starts_with("b\"") || repr.starts_with("br");