From ce14a42c2c791694ed99c26c317373419cad88be Mon Sep 17 00:00:00 2001
From: Sam Rawlins <srawlins@google.com>
Date: Mon, 22 Jul 2024 20:30:58 -0700
Subject: [PATCH 1/3] Update Dart for digit-separators feature

---
 src/languages/dart.js | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/languages/dart.js b/src/languages/dart.js
index 2b801255e4..d7a2065516 100644
--- a/src/languages/dart.js
+++ b/src/languages/dart.js
@@ -25,6 +25,15 @@ export default function(hljs) {
     keywords: 'true false null this is new super'
   };
 
+  const NUMBER = {
+    className: 'number',
+    relevance: 0,
+    variants: [
+      { begin: "\\b[0-9][0-9_]*(\\.[0-9][0-9_]*)?([eE][+-]?[0-9][0-9_]*)?\\b" },
+      { begin: "\\b0[xX][0-9A-Fa-f][0-9A-Fa-f_]*\\b" }
+    ]
+  };
+
   const STRING = {
     className: 'string',
     variants: [
@@ -87,7 +96,7 @@ export default function(hljs) {
     ]
   };
   BRACED_SUBST.contains = [
-    hljs.C_NUMBER_MODE,
+    NUMBER,
     STRING
   ];
 
@@ -248,7 +257,7 @@ export default function(hljs) {
           hljs.UNDERSCORE_TITLE_MODE
         ]
       },
-      hljs.C_NUMBER_MODE,
+      NUMBER,
       {
         className: 'meta',
         begin: '@[A-Za-z]+'

From 0ad4bf9c2accb5aba227f3de6f4cde7a6aa494fe Mon Sep 17 00:00:00 2001
From: Sam Rawlins <srawlins@google.com>
Date: Mon, 22 Jul 2024 20:39:43 -0700
Subject: [PATCH 2/3] changelog

---
 CHANGES.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGES.md b/CHANGES.md
index d84c96801a..7363f1b07a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -13,6 +13,7 @@ Core Grammars:
 - enh(erlang) OTP 27 doc attribute [nixxquality][]
 - enh(erlang) OTP 27 Sigil type [nixxquality][]
 - enh(erlang) OTP25/27 maybe statement [nixxquality][]
+- enh(dart) Support digit-separators in number literals [Sam Rawlins][]
 
 New Grammars:
 

From 12d034fdabace20a22fdd20e2437a4f90c995379 Mon Sep 17 00:00:00 2001
From: Sam Rawlins <srawlins@google.com>
Date: Wed, 24 Jul 2024 09:57:31 -0700
Subject: [PATCH 3/3] feedback

---
 CHANGES.md            | 1 +
 src/languages/dart.js | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/CHANGES.md b/CHANGES.md
index 7363f1b07a..8b1b9d3dc4 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -34,6 +34,7 @@ CONTRIBUTORS
 [BaliBalo]: https://github.com/BaliBalo
 [William Wilkinson]: https://github.com/wilkinson4
 [nixxquality]: https://github.com/nixxquality
+[srawlins]: https://github.com/srawlins
 
 
 ## Version 11.10.0
diff --git a/src/languages/dart.js b/src/languages/dart.js
index d7a2065516..32e4b43b2a 100644
--- a/src/languages/dart.js
+++ b/src/languages/dart.js
@@ -29,8 +29,8 @@ export default function(hljs) {
     className: 'number',
     relevance: 0,
     variants: [
-      { begin: "\\b[0-9][0-9_]*(\\.[0-9][0-9_]*)?([eE][+-]?[0-9][0-9_]*)?\\b" },
-      { begin: "\\b0[xX][0-9A-Fa-f][0-9A-Fa-f_]*\\b" }
+      { match: /\b[0-9][0-9_]*(\.[0-9][0-9_]*)?([eE][+-]?[0-9][0-9_]*)?\b/ },
+      { match: /\b0[xX][0-9A-Fa-f][0-9A-Fa-f_]*\b/ }
     ]
   };