[clang] [clang-format] Refactor case and goto label parsing (PR #196815)

[via cfe-commits]

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@@ -1714,9 +1714,32 @@ void UnwrappedLineParser::parseStructuralElement(
       if (!Line->InMacroBody || CurrentLines->size() > 1)
         Line->Tokens.begin()->Tok->MustBreakBefore = true;
       FormatTok->setFinalizedType(TT_GotoLabelColon);
-      parseLabel(Style.IndentGotoLabels);
+      const auto OldLineLevel = Line->Level;
+      switch (Style.IndentGotoLabels) {
+      case FormatStyle::IGLS_NoIndent:
+        Line->Level = 0;
+        break;
+      case FormatStyle::IGLS_OuterIndent:
+        if (Line->Level > 1 || (!Line->InPPDirective && Line->Level > 0))
+          --Line->Level;
+        break;
+      case FormatStyle::IGLS_HalfIndent:
+      case FormatStyle::IGLS_InnerIndent:
+        break;
+      }
+      nextToken();
+      if (FormatTok->is(tok::semi))
+        nextToken();
+      addUnwrappedLine();
+      Line->Level = OldLineLevel;
       if (HasLabel)
         *HasLabel = true;
+
+      if (FormatTok->isNot(tok::l_brace)) {
+        // "Rerun" this function, this is e.g. for unbraced control statements.
+        parseStructuralElement();
+        addUnwrappedLine();
+      }
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owenca wrote:

Ditto.

https://github.com/llvm/llvm-project/pull/196815