[clang] [clang-format]: Add `Custom` to `ShortFunctionStyle`; add new AllowShortFunctionsOnASingleLineOptions for granular setup (PR #134337)

[via cfe-commits]

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@@ -1472,6 +1483,30 @@ static void expandPresetsSpacesInParens(FormatStyle &Expanded) {
   Expanded.SpacesInParensOptions = {};
 }
 
+static void expandPresetsShortFunctionsOnSingleLine(FormatStyle &Expanded) {
+  if (Expanded.AllowShortFunctionsOnASingleLine == FormatStyle::SFS_Custom)
+    return;
+  // Reset all flags
+  Expanded.AllowShortFunctionsOnASingleLineOptions = {};
+
+  if (Expanded.AllowShortFunctionsOnASingleLine == FormatStyle::SFS_None)
+    return;
+
+  if (Expanded.AllowShortFunctionsOnASingleLine == FormatStyle::SFS_Empty ||
+      Expanded.AllowShortFunctionsOnASingleLine == FormatStyle::SFS_Inline) {
+    Expanded.AllowShortFunctionsOnASingleLineOptions.Empty = true;
+  }
+
+  if (Expanded.AllowShortFunctionsOnASingleLine == FormatStyle::SFS_Inline ||
+      Expanded.AllowShortFunctionsOnASingleLine ==
+          FormatStyle::SFS_InlineOnly) {
+    Expanded.AllowShortFunctionsOnASingleLineOptions.Inline = true;
+  }
+
+  if (Expanded.AllowShortFunctionsOnASingleLine == FormatStyle::SFS_All)
+    Expanded.AllowShortFunctionsOnASingleLineOptions.Other = true;
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irymarchyk wrote:

This is not relevant anymore.

https://github.com/llvm/llvm-project/pull/134337