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

[Owen Pan via cfe-commits]

================
@@ -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) &&
----------------
owenca wrote:

What I suggested is more consistent with the existing code in clang-format. Also, explicitly including/excluding every enum value is cumbersome and doesn't provide any real advantage, IMO.

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