dianaclarke commented on a change in pull request #9739:
URL: https://github.com/apache/arrow/pull/9739#discussion_r595979695
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File path: docs/source/developers/cpp/development.rst
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@@ -77,6 +77,10 @@ This project follows `Google's C++ Style Guide
* We relax the line length restriction to 90 characters.
* We use the ``NULLPTR`` macro in header files (instead of ``nullptr``) defined
in ``src/arrow/util/macros.h`` to support building C++/CLI (ARROW-1134)
+* For internal types (not in public headers) it is ok to use structs for
+ convenience (e.g. list initialization) if access control is not needed
+ (e.g. no public access to a nested type) even if the struct has
+ state/invaiants
Review comment:
`s/invaiants/invariants/` ?
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