From d91670a6c0b6147c473fef6df3c1cdad427c8cfc Mon Sep 17 00:00:00 2001
From: Aaron Liu <aaronliu0130@gmail.com>
Date: Wed, 26 Nov 2025 21:01:40 -0500
Subject: [PATCH] fix(IWYU): force std:: or <> for max, min, copy

suppress false positive on direct initialization (`int max(0);`)
---
 cpplint.py          | 14 ++++++++++----
 cpplint_unittest.py |  1 +
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/cpplint.py b/cpplint.py
index 146e798..50c8ab3 100755
--- a/cpplint.py
+++ b/cpplint.py
@@ -6837,9 +6837,6 @@ def ExpectingFunctionArgs(clean_lines, linenum):
     (
         "<algorithm>",
         (
-            "copy",
-            "max",
-            "min",
             "min_element",
             "sort",
             "transform",
@@ -6917,11 +6914,20 @@ def ExpectingFunctionArgs(clean_lines, linenum):
         for _template in _templates
     )
 
-# Map is often overloaded. Only check, if it is fully qualified.
+# Often overloaded, only check if fully qualified.
 # Match 'std::map<type>(...)', but not 'map<type>(...)''
 _re_pattern_headers_maybe_templates.append(
     (re.compile(r"(std\b::\bmap\s*\<)|(^(std\b::\b)map\b\(\s*\<)"), "map<>", "<map>")
 )
+# Otherwise, causes false positives with direct initialization. ('int max(0);')
+_re_pattern_headers_maybe_templates.extend(
+    (
+        re.compile(rf"std\b::\b{_template}\s*\([^\)]|\b{_template}\s*<.*?>\([^\)]"),
+        _template,
+        "<algorithm>",
+    )
+    for _template in ("copy", "max", "min")
+)
 
 # Other scripts may reach in and modify this pattern.
 _re_pattern_templates: list[tuple[re.Pattern, str, str]] = []
diff --git a/cpplint_unittest.py b/cpplint_unittest.py
index 574e5fd..a8e3f38 100755
--- a/cpplint_unittest.py
+++ b/cpplint_unittest.py
@@ -1227,6 +1227,7 @@ def testIncludeWhatYouUse(self):
         """,
             "Add #include <algorithm> for min  [build/include_what_you_use] [4]",
         )
+        self.TestIncludeWhatYouUse("int max(0), copy(max), min();", "")
         self.TestIncludeWhatYouUse(
             'cout << "hello world" << endl;',
             "Add #include <iostream> for cout  [build/include_what_you_use] [4]",