[clang] [clang-format] Option to insert spaces before the closing `*/` (PR #162105)

[Björn Schäpers via cfe-commits]

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@@ -315,6 +315,19 @@ class AnnotatedLine;
 
 /// A wrapper around a \c Token storing information about the
 /// whitespace characters preceding it.
+
+// Describes the kind of a block comment.
+enum class CommentKind {
+  // A plain comment, i.e. /* ... */.
+  Plain,
+  // A comment that starts with /*! or /**.
+  Docstring,
+  // A comment that looks like a parameter, e.g. /*in*/.
+  Parameter,
+  // A comment that is a sentinel, e.g. /*FALLTHROUGH*/.
+  Sentinel,
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HazardyKnusperkeks wrote:

Do you have a style guide which suggest adding spaces into comments, but doesn't for the potential `Sentinel`s? I personally wouldn't enable this option, so no real input from me, but I'd guess someone who wants spaces inside the comments can also live with `/* FALLTHROUGH */`. Most of those comments I've seen are also in lower case and sometimes with `fall-through` or `fall through`, which may open endless possibilities to support, if we support one. So I'd say we don't need that, the comments on the other hand as suggested by @mydeveloperday are common practice in many code bases (e.g. LLVM).

https://github.com/llvm/llvm-project/pull/162105