From feb83e66c6ee656a60f888698c64f976756c614c Mon Sep 17 00:00:00 2001
From: Campbell Barton <campbell@blender.org>
Date: Sun, 2 Jul 2023 19:37:20 +1000
Subject: [PATCH] code_clean: add use_empty_void_arg cleanup operation

Removes the use of (void) in C++ for functions with no arguments
---
 tools/utils_maintenance/code_clean.py | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/tools/utils_maintenance/code_clean.py b/tools/utils_maintenance/code_clean.py
index 13a90e31631..c744f35f47b 100755
--- a/tools/utils_maintenance/code_clean.py
+++ b/tools/utils_maintenance/code_clean.py
@@ -569,6 +569,32 @@ class edit_generators:
 
             return edits
 
+    class use_empty_void_arg(EditGenerator):
+        """
+        Use ``()`` instead of ``(void)`` for C++ code.
+
+        Replace:
+          function(void) {}
+        With:
+          function() {}
+        """
+        @staticmethod
+        def edit_list_from_file(source: str, data: str, _shared_edit_data: Any) -> List[Edit]:
+            edits: List[Edit] = []
+
+            # The user might include C & C++, if they forget, it is better not to operate on C.
+            if source.lower().endswith((".h", ".c")):
+                return edits
+
+            # `(void)` -> `()`.
+            for match in re.finditer(r"(\(void\))(\s*{)", data, flags=re.MULTILINE):
+                edits.append(Edit(
+                    span=match.span(),
+                    content="()" + match.group(2),
+                    content_fail="(__ALWAYS_FAIL__) {",
+                ))
+            return edits
+
     class unused_arg_as_comment(EditGenerator):
         """
         Replace `UNUSED(argument)` in C++ code.