[polly] [clang] [clang-format] Add AllowShortType option for AlwaysBreakAfterReturnType. (PR #78011)

[Björn Schäpers via cfe-commits]

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@@ -587,7 +590,7 @@ bool ContinuationIndenter::mustBreak(const LineState &State) {
       !State.Line->ReturnTypeWrapped &&
       // Don't break before a C# function when no break after return type.
       (!Style.isCSharp() ||
-       Style.AlwaysBreakAfterReturnType != FormatStyle::RTBS_None) &&
+       Style.AlwaysBreakAfterReturnType > FormatStyle::RTBS_AllowShortType) &&
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HazardyKnusperkeks wrote:

I know, just wanted to state my opinion. The cumbersome part could be extracted into a function. I just don't like treating enums as numbers in general. Sometimes there are exceptions, but in my opinion I would use this in clang-format only for `Standard`.

https://github.com/llvm/llvm-project/pull/78011