From 514eaf9637552f94666992849d3647e25743c113 Mon Sep 17 00:00:00 2001
From: Puneet Dixit <236133619+puneetdixit200@users.noreply.github.com>
Date: Thu, 21 May 2026 18:29:43 +0530
Subject: [PATCH] Fix C++ function highlighting for keyword prefixes

---
 src/languages/cpp.js                              |  6 +++++-
 test/markup/cpp/function-like-keywords.expect.txt | 12 ++++++++++++
 test/markup/cpp/function-like-keywords.txt        | 12 ++++++++++++
 3 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/src/languages/cpp.js b/src/languages/cpp.js
index 1b3e337784..49f7a42de0 100644
--- a/src/languages/cpp.js
+++ b/src/languages/cpp.js
@@ -417,6 +417,10 @@ export default function(hljs) {
     _type_hints: TYPE_HINTS
   };
 
+  const RESERVED_KEYWORD_RE = regex.either(
+    ...RESERVED_KEYWORDS.map(keyword => keyword.replace(/\|\d+$/, ''))
+  );
+
   const FUNCTION_DISPATCH = {
     className: 'function.dispatch',
     relevance: 0,
@@ -425,7 +429,7 @@ export default function(hljs) {
       _hint: FUNCTION_HINTS },
     begin: regex.concat(
       /\b/,
-      `(?!${RESERVED_KEYWORDS.join('|')})`,
+      `(?!${RESERVED_KEYWORD_RE}\\b)`,
       hljs.IDENT_RE,
       regex.lookahead(/(<[^<>]+>|)\s*\(/))
   };
diff --git a/test/markup/cpp/function-like-keywords.expect.txt b/test/markup/cpp/function-like-keywords.expect.txt
index 2f6e266e58..c3db088541 100644
--- a/test/markup/cpp/function-like-keywords.expect.txt
+++ b/test/markup/cpp/function-like-keywords.expect.txt
@@ -10,3 +10,15 @@
 <span class="hljs-function"><span class="hljs-type">void</span> <span class="hljs-title">f</span><span class="hljs-params">()</span> </span>= <span class="hljs-keyword">delete</span>(<span class="hljs-string">&quot;reason&quot;</span>);
 
 <span class="hljs-keyword">static_assert</span>(<span class="hljs-literal">true</span>);
+
+<span class="hljs-built_in">format</span>();
+
+<span class="hljs-built_in">for_this</span>();
+
+<span class="hljs-built_in">whilexyz</span>();
+
+<span class="hljs-keyword">if</span> (<span class="hljs-built_in">ifsyz</span>()) {}
+
+<span class="hljs-built_in">returnxyz</span>();
+
+<span class="hljs-built_in">thisxyz</span>();
diff --git a/test/markup/cpp/function-like-keywords.txt b/test/markup/cpp/function-like-keywords.txt
index 608611fa8d..7ec3ee2e39 100644
--- a/test/markup/cpp/function-like-keywords.txt
+++ b/test/markup/cpp/function-like-keywords.txt
@@ -10,3 +10,15 @@ for (;;) {}
 void f() = delete("reason");
 
 static_assert(true);
+
+format();
+
+for_this();
+
+whilexyz();
+
+if (ifsyz()) {}
+
+returnxyz();
+
+thisxyz();