[clang] [clang-format] TableGen multi line string support. (PR #78032)

[Hirofumi Nakamura via cfe-commits]

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@@ -763,6 +773,53 @@ void FormatTokenLexer::handleCSharpVerbatimAndInterpolatedStrings() {
   resetLexer(SourceMgr.getFileOffset(Lex->getSourceLocation(Offset + 1)));
 }
 
+void FormatTokenLexer::handleTableGenMultilineString() {
+  FormatToken *MultiLineString = Tokens.back();
+  if (MultiLineString->isNot(TT_TableGenMultiLineString))
+    return;
+
+  bool PrevIsRBrace = false;
+  const char *FirstBreak = nullptr;
+  const char *LastBreak = nullptr;
+  const char *Begin = MultiLineString->TokenText.begin();
+  // Skip until }], the closer of multi line string found.
+  for (const char *Current = Begin, *End = Lex->getBuffer().end();
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hnakamura5 wrote:

Changed the algorithm to use find and rfind as suggestion. The new one looks better.

https://github.com/llvm/llvm-project/pull/78032