[clang] [clang-format] Introduce "ReflowComments: IndentOnly" to re-indent comments without breaking internal structure (think Doxygen). (PR #96804)

[Iuri Chaer via cfe-commits]

================
@@ -3749,24 +3749,47 @@ struct FormatStyle {
   /// \version 13
   ReferenceAlignmentStyle ReferenceAlignment;
 
-  // clang-format off
-  /// If ``true``, clang-format will attempt to re-flow comments. That is it
-  /// will touch a comment and *reflow* long comments into new lines, trying to
-  /// obey the ``ColumnLimit``.
-  /// \code
-  ///    false:
-  ///    // veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment with 
plenty of information
-  ///    /* second veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment 
with plenty of information */
-  ///
-  ///    true:
-  ///    // veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment with 
plenty of
-  ///    // information
-  ///    /* second veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment 
with plenty of
-  ///     * information */
-  /// \endcode
-  /// \version 3.8
-  bool ReflowComments;
-  // clang-format on
+  /// \brief Types of comment re-flow style.
+  enum ReflowCommentsStyle : int8_t {
+    // clang-format off
+    /// Leave comments untouched.
+    /// \code
+    ///    // veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment with 
plenty of information
+    ///    /* second veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment 
with plenty of information */
+    ///    /* third veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment 
with plenty of information
+    ///         * and a misaligned second line */
+    /// \endcode
+    // clang-format on
+    RCS_Never,
+    // clang-format off
+    /// Only apply indentation rules, moving comments left or right, without
+    /// changing formatting inside the comments.
+    /// \code
+    ///    // veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment with 
plenty of information
+    ///    /* second veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment 
with plenty of information */
+    ///    /* third veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment 
with plenty of information
+    ///     * and a misaligned second line */
+    /// \endcode
+    // clang-format on
+    RCS_IndentOnly,
+    // clang-format off
+    /// Apply indentation rules and re-flow long comments into new lines, 
trying
+    /// to obey the ``ColumnLimit``.
+    /// \code
+    ///    // veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment with 
plenty of
+    ///    // information
+    ///    /* second veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment 
with plenty of
+    ///     * information */
+    ///    /* third veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment 
with plenty of
+    ///     * information and a misaligned second line */
+    /// \endcode
+    // clang-format on
+    RCS_Always
+  };
+
+  /// \brief Comment reformatting style.
+  /// \version 20
----------------
ichaer wrote:

lol, why have I changed that :sweat_smile:

https://github.com/llvm/llvm-project/pull/96804
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