From bf27c55563994a634b76b6f78afcf538a8b89839 Mon Sep 17 00:00:00 2001
From: pommicket <pommicket@gmail.com>
Date: Wed, 17 Jul 2024 23:12:30 -0700
Subject: fix highlighting of '\u{1023}' in Rust

---
 syntax.c | 25 +++++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

(limited to 'syntax.c')

diff --git a/syntax.c b/syntax.c
index e68797a..956f653 100644
--- a/syntax.c
+++ b/syntax.c
@@ -596,14 +596,31 @@ static void syntax_highlight_rust(SyntaxState *state, const char32_t *line, u32
 					if (line[char_end] == '\'' && backslashes % 2 == 0) {
 						break;
 					}
+					if (backslashes % 2 == 1 && line[char_end] == 'u'
+						&& char_end + 3 < line_len && line[char_end + 1] == '{') {
+						// unicode character literal e.g. '\u{1234}'
+						char_end += 2; // skip u{
+						while (char_end + 1 < line_len) {
+							char_end++;
+							if (line[char_end] == '}') {
+								char_end++;
+								break;
+							}
+						}
+						if (line[char_end - 1] != '}') {
+							// not a unicode character
+							char_end = line_len;
+						}
+						break;
+					}
+					if (line[char_end] < CHAR_MAX
+						&& backslashes % 2 == 0
+						&& !strchr("abcdefABCDEF0123456789", (char)line[char_end]))
+						break;
 					if (line[char_end] == '\\')
 						++backslashes;
 					else
 						backslashes = 0;
-					if (line[char_end] < CHAR_MAX
-					&& line[char_end - 1] != '\\'
-					&& !strchr("abcdefABCDEF0123456789", (char)line[char_end]))
-						break;
 				}
 				if (char_end < line_len && line[char_end] == '\'') {
 					// a character literal
-- 
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