From 29400d4fab3794d2cb7d65112a88af72282a3911 Mon Sep 17 00:00:00 2001
From: Abhinav Singh <theawless@gmail.com>
Date: Wed, 11 Jun 2025 18:26:02 -0700
Subject: [PATCH 1/3] fix: unicode backslash escaped single quote in char
 literal

---
 grammar.js               | 4 ++++
 test/corpus/literals.txt | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/grammar.js b/grammar.js
index a97fd9f..138ccee 100644
--- a/grammar.js
+++ b/grammar.js
@@ -165,10 +165,14 @@ module.exports = grammar({
 
     character_literal: _ => token(seq(
       '\'',
+      // this accepts multiple characters while java doesn't
+      // hence multiple characters (even unicode ones) are allowed
       repeat1(choice(
         /[^\\'\n]/,
         /\\./,
         /\\\n/,
+        /\\u+005[cC]./,
+        /\\u+005[cC]\n/,
       )),
       '\'',
     )),
diff --git a/test/corpus/literals.txt b/test/corpus/literals.txt
index fe49e80..5e42bcc 100644
--- a/test/corpus/literals.txt
+++ b/test/corpus/literals.txt
@@ -125,6 +125,8 @@ character literals
 '\uFFFF';
 '\177';
 '™';
+'\u005cn';
+'\u005c'';
 
 ---
 
@@ -137,6 +139,8 @@ character literals
   (expression_statement (character_literal))
   (expression_statement (character_literal))
   (expression_statement (character_literal))
+  (expression_statement (character_literal))
+  (expression_statement (character_literal))
   (expression_statement (character_literal)))
 
 ===============

From 722c45e231547f1aa822babe27145f46b0cd1393 Mon Sep 17 00:00:00 2001
From: Abhinav Singh <theawless@gmail.com>
Date: Wed, 11 Jun 2025 21:36:01 -0700
Subject: [PATCH 2/3] fix: multiple u chars in unicode escapes within string
 literals

---
 grammar.js               | 2 +-
 test/corpus/literals.txt | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/grammar.js b/grammar.js
index 138ccee..8e9566c 100644
--- a/grammar.js
+++ b/grammar.js
@@ -222,7 +222,7 @@ module.exports = grammar({
         /[^xu0-7]/,
         /[0-7]{1,3}/,
         /x[0-9a-fA-F]{2}/,
-        /u[0-9a-fA-F]{4}/,
+        /u+[0-9a-fA-F]{4}/,
         /u\{[0-9a-fA-F]+\}/,
       ))),
 
diff --git a/test/corpus/literals.txt b/test/corpus/literals.txt
index 5e42bcc..c6ecbbc 100644
--- a/test/corpus/literals.txt
+++ b/test/corpus/literals.txt
@@ -151,6 +151,7 @@ string literals
 "\"";
 "This is a string";
 "'";
+"\uuu0041";
 
 ---
 
@@ -165,7 +166,10 @@ string literals
           (string_fragment)))
       (expression_statement
         (string_literal
-          (string_fragment))))
+          (string_fragment)))
+      (expression_statement
+        (string_literal
+          (escape_sequence))))
 
 ===============
 text block

From a6b5342f579e329a07df09ef70f09df7b1736e7d Mon Sep 17 00:00:00 2001
From: Abhinav Singh <theawless@gmail.com>
Date: Wed, 11 Jun 2025 21:44:46 -0700
Subject: [PATCH 3/3] fix: unicode backslash escaped double quote in string
 literal

---
 grammar.js               | 2 +-
 test/corpus/literals.txt | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/grammar.js b/grammar.js
index 8e9566c..0426af2 100644
--- a/grammar.js
+++ b/grammar.js
@@ -217,7 +217,7 @@ module.exports = grammar({
       prec(1, $.escape_sequence),
     ),
     escape_sequence: _ => token.immediate(seq(
-      '\\',
+      choice('\\', /\\u+005[cC]/),
       choice(
         /[^xu0-7]/,
         /[0-7]{1,3}/,
diff --git a/test/corpus/literals.txt b/test/corpus/literals.txt
index c6ecbbc..18940a0 100644
--- a/test/corpus/literals.txt
+++ b/test/corpus/literals.txt
@@ -152,6 +152,7 @@ string literals
 "This is a string";
 "'";
 "\uuu0041";
+"\u005c"";
 
 ---
 
@@ -167,6 +168,9 @@ string literals
       (expression_statement
         (string_literal
           (string_fragment)))
+      (expression_statement
+        (string_literal
+          (escape_sequence)))
       (expression_statement
         (string_literal
           (escape_sequence))))