[clang] [clang-format] Add option AllowShortRecordOnASingleLine (PR #154580)

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=?utf-8?q?Tomáš?= Slanina <itzexpoe...@gmail.com>,
=?utf-8?q?Tomáš?= Slanina <itzexpoe...@gmail.com>,
=?utf-8?q?Tomáš?= Slanina <itzexpoe...@gmail.com>,
=?utf-8?q?Tomáš?= Slanina <itzexpoe...@gmail.com>,
=?utf-8?q?Tomáš?= Slanina <itzexpoe...@gmail.com>,
=?utf-8?q?Tomáš?= Slanina <itzexpoe...@gmail.com>,
=?utf-8?q?Tomáš?= Slanina <itzexpoe...@gmail.com>,
=?utf-8?q?Tomáš?= Slanina <itzexpoe...@gmail.com>,
=?utf-8?q?Tomáš?= Slanina <itzexpoe...@gmail.com>,
=?utf-8?q?Tomáš?= Slanina <itzexpoe...@gmail.com>,
=?utf-8?q?Tomáš?= Slanina <itzexpoe...@gmail.com>,
=?utf-8?q?Tomáš?= Slanina <itzexpoe...@gmail.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/154...@github.com>


================
@@ -928,9 +954,15 @@ class LineJoiner {
         return 0;
       Limit -= 2;
       unsigned MergedLines = 0;
-      if (Style.AllowShortBlocksOnASingleLine != FormatStyle::SBS_Never ||
-          (I[1]->First == I[1]->Last && I + 2 != E &&
-           I[2]->First->is(tok::r_brace))) {
+
+      const bool TryMergeBlock =
+          Style.AllowShortBlocksOnASingleLine != FormatStyle::SBS_Never;
+      const bool TryMergeRecord =
+          Style.AllowShortRecordOnASingleLine == FormatStyle::SRS_Always;
+      const bool NextIsEmptyBlock = I[1]->First == I[1]->Last && I + 2 != E &&
+                                    I[2]->First->is(tok::r_brace);
+
+      if (TryMergeBlock || TryMergeRecord || NextIsEmptyBlock) {
----------------
owenca wrote:

```suggestion
      auto TryMergeBlock = [&] {
        if (Style.AllowShortBlocksOnASingleLine != FormatStyle::SBS_Never ||
            Style.AllowShortRecordOnASingleLine == FormatStyle::SRS_Always) {
          return true;
        }
        return I[1]->First == I[1]->Last && I + 2 != E &&
               I[2]->First->is(tok::r_brace);
      };

      if (TryMergeBlock()) {
```

https://github.com/llvm/llvm-project/pull/154580
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