From 4d8976b619fbb2ab19c1e46fccbca4294c0c2d0b Mon Sep 17 00:00:00 2001
From: Yip Coekjan <69834864+Coekjan@users.noreply.github.com>
Date: Sun, 14 Jul 2024 20:54:51 +0800
Subject: [PATCH] Fix lexer behavior on non-whitespace before ref (#4553)

---
 crates/typst-syntax/src/lexer.rs | 2 +-
 tests/suite/model/ref.typ        | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/crates/typst-syntax/src/lexer.rs b/crates/typst-syntax/src/lexer.rs
index dd05e73f..993af080 100644
--- a/crates/typst-syntax/src/lexer.rs
+++ b/crates/typst-syntax/src/lexer.rs
@@ -474,7 +474,7 @@ impl Lexer<'_> {
                 Some('-') if !s.at(['-', '?']) => {}
                 Some('.') if !s.at("..") => {}
                 Some('h') if !s.at("ttp://") && !s.at("ttps://") => {}
-                Some('@') if !s.at(is_id_start) => {}
+                Some('@') if !s.at(is_valid_in_label_literal) => {}
                 _ => break,
             }
 
diff --git a/tests/suite/model/ref.typ b/tests/suite/model/ref.typ
index 200f40aa..d0881202 100644
--- a/tests/suite/model/ref.typ
+++ b/tests/suite/model/ref.typ
@@ -54,3 +54,8 @@ $ A = 1 $ <eq2>
 // Error: 1-7 label occurs in the document and its bibliography
 @arrgh
 #bibliography("/assets/bib/works.bib")
+
+--- issue-4536-non-whitespace-before-ref ---
+// Test reference with non-whitespace before it.
+#figure[] <1>
+#test([(#ref(<1>))], [(@1)])