[clang] [clang-format] Preserve trailing NOLINTEND placement with SeparateDefinitionBlocks (PR #190741)

[Björn Schäpers via cfe-commits]

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@@ -4768,5 +4768,25 @@ bool isClangFormatOff(StringRef Comment) {
   return isClangFormatOnOff(Comment, /*On=*/false);
 }
 
+static bool isNoLintBeginEnd(StringRef Comment, bool On) {
+  if (Comment == (On ? "/* NOLINTBEGIN */" : "/* NOLINTEND */"))
+    return true;
+
+  static const char NoLintBegin[] = "// NOLINTBEGIN";
+  static const char NoLintEnd[] = "// NOLINTEND";
+  const unsigned Size = (On ? sizeof NoLintBegin : sizeof NoLintEnd) - 1;
+
+  return Comment.starts_with(On ? NoLintBegin : NoLintEnd) &&
+         (Comment.size() == Size || Comment[Size] == ':');
+}
+
+bool isNoLintEnd(StringRef Comment) {
+  return isNoLintBeginEnd(Comment, /*On=*/false);
+}
+
+bool isNoLintBegin(StringRef Comment) {
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HazardyKnusperkeks wrote:

For what? You never call this one.

https://github.com/llvm/llvm-project/pull/190741