[llvm] [CodingStandard] Add a rule about non-member definitions in CPP files (PR #126775)

[Rahul Joshi via llvm-commits]

https://github.com/jurahul created https://github.com/llvm/llvm-project/pull/126775

Add a rule suggesting that non-member definitions in CPP files should be made static unless they are referenced outside that file.

>From 3fd77ac4f5a4ff9b62a44484f549e657e4431330 Mon Sep 17 00:00:00 2001
From: Rahul Joshi <rjoshi at nvidia.com>
Date: Tue, 11 Feb 2025 10:14:48 -0800
Subject: [PATCH] [CodingStandard] Add a rule about non-member definitions in
 CPP files

- Add a rule suggesting that non-member definitions in CPP files should
  be made static unless they are referenced outside that file.
---
 llvm/docs/CodingStandards.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/llvm/docs/CodingStandards.rst b/llvm/docs/CodingStandards.rst
index d6d6ecf759cf3..2ab4234d1cfc5 100644
--- a/llvm/docs/CodingStandards.rst
+++ b/llvm/docs/CodingStandards.rst
@@ -1499,6 +1499,12 @@ Do:
     }
   };
 
+Make non-member variables and functions in `.cpp` files static
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+When non-member functions or variables are defined in a `.cpp`` file and need
+not be referenced outside that file, make them `static`.
+
 Microscopic Details
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