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

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=?utf-8?q?Tom=C3=A1=C5=A1?= Slanina <itzexpoexpo at gmail.com>,
=?utf-8?q?Tom=C3=A1=C5=A1?= Slanina <itzexpoexpo at gmail.com>,
=?utf-8?q?Tom=C3=A1=C5=A1?= Slanina <itzexpoexpo at gmail.com>,
=?utf-8?q?Tom=C3=A1=C5=A1?= Slanina <itzexpoexpo at gmail.com>,
=?utf-8?q?Tom=C3=A1=C5=A1?= Slanina <itzexpoexpo at gmail.com>,
=?utf-8?q?Tom=C3=A1=C5=A1?= Slanina <itzexpoexpo at gmail.com>,
=?utf-8?q?Tom=C3=A1=C5=A1?= Slanina <itzexpoexpo at gmail.com>,
=?utf-8?q?Tom=C3=A1=C5=A1?= Slanina <itzexpoexpo at gmail.com>,
=?utf-8?q?Tom=C3=A1=C5=A1?= Slanina <itzexpoexpo at gmail.com>,
=?utf-8?q?Tom=C3=A1=C5=A1?= Slanina <itzexpoexpo at gmail.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/154580 at github.com>


================
@@ -873,9 +894,11 @@ class LineJoiner {
         return 1;
       } else if (Limit != 0 && !Line.startsWithNamespace() &&
                  !startsExternCBlock(Line)) {
-        // We don't merge short records.
-        if (isRecordLBrace(*Line.Last))
+        // Merge short records only when requested.
+        if (isRecordLBrace(*Line.Last) &&
+            Style.AllowShortRecordOnASingleLine < FormatStyle::SRS_Always) {
----------------
owenca wrote:

```suggestion
            Style.AllowShortRecordOnASingleLine != FormatStyle::SRS_Always) {
```

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