[clang-format] NFC allow Format.h to be clang-formatted but still maintain the same doc layout in ClangFormatStyleOptions.rst

Summary:
Format.h is used to generate ClangFormatStyleOptions.rst, the layout of the comments is critical to the rst file. Accidentally clang-formatting Format.h can lead to the .rst changing.

This revision simply add // clang-format off/on statement around the areas who formatting needs to be maintained, mainly around the options that are related to what happens when the line breaks due to `ColumnLimit` (which is what is happening to the comment)

This allows Format.h to be clang-formatted without causing a change in the documentation when dump_format_style.py is rerun, which is also part of the revision.

Reviewers: mitchell-stellar, klimek, sammccall, owenpan

Reviewed By: mitchell-stellar

Subscribers: cfe-commits

Tags: #clang, #clang-format

Differential Revision: https://reviews.llvm.org/D69951

clang/docs/ClangFormatStyleOptions.rst

@@ -1584,8 +1584,9 @@ the configuration (without a prefix: ``Auto``).
 **IndentCaseLabels** (``bool``)
   Indent case labels one level from the switch statement.
 
-  When ``false``, use the same indentation level as for the switch statement.
-  Switch statement body is always indented one level more than case labels.
+  When ``false``, use the same indentation level as for the switch
+  statement. Switch statement body is always indented one level more than
+  case labels.
 
   .. code-block:: c++
 

clang/include/clang/Format/Format.h

@@ -1161,6 +1161,7 @@ struct FormatStyle {
   /// \endcode
   bool CompactNamespaces;
 
+  // clang-format off
   /// If the constructor initializers don't fit on a line, put each
   /// initializer on its own line.
   /// \code
@@ -1178,6 +1179,7 @@ struct FormatStyle {
   ///   }
   /// \endcode
   bool ConstructorInitializerAllOnOneLineOrOnePerLine;
+  // clang-format on
 
   /// The number of characters to use for indentation of constructor
   /// initializer lists as well as inheritance lists.
@@ -1306,8 +1308,9 @@ struct FormatStyle {
 
   /// Indent case labels one level from the switch statement.
   ///
-  /// When ``false``, use the same indentation level as for the switch statement.
-  /// Switch statement body is always indented one level more than case labels.
+  /// When ``false``, use the same indentation level as for the switch
+  /// statement. Switch statement body is always indented one level more than
+  /// case labels.
   /// \code
   ///    false:                                 true:
   ///    switch (fool) {                vs.     switch (fool) {
@@ -1453,6 +1456,7 @@ struct FormatStyle {
   /// The JavaScriptQuoteStyle to use for JavaScript strings.
   JavaScriptQuoteStyle JavaScriptQuotes;
 
+  // clang-format off
   /// Whether to wrap JavaScript import/export statements.
   /// \code{.js}
   ///    true:
@@ -1466,6 +1470,7 @@ struct FormatStyle {
   ///    import {VeryLongImportsAreAnnoying, VeryLongImportsAreAnnoying, VeryLongImportsAreAnnoying,} from "some/module.js"
   /// \endcode
   bool JavaScriptWrapImports;
+  // clang-format on
 
   /// If true, the empty line at the start of blocks is kept.
   /// \code
@@ -1747,6 +1752,7 @@ struct FormatStyle {
   /// \endcode
   std::vector<RawStringFormat> RawStringFormats;
 
+  // clang-format off
   /// If ``true``, clang-format will attempt to re-flow comments.
   /// \code
   ///    false:
@@ -1760,6 +1766,7 @@ struct FormatStyle {
   ///     * information */
   /// \endcode
   bool ReflowComments;
+  // clang-format on
 
   /// If ``true``, clang-format will sort ``#includes``.
   /// \code
@@ -2294,8 +2301,7 @@ tooling::Replacements reformat(const FormatStyle &Style, StringRef Code,
 /// a non-recoverable syntax error.
 tooling::Replacements reformat(const FormatStyle &Style, StringRef Code,
                                ArrayRef<tooling::Range> Ranges,
-                               StringRef FileName,
-                               bool *IncompleteFormat);
+                               StringRef FileName, bool *IncompleteFormat);
 
 /// Clean up any erroneous/redundant code in the given \p Ranges in \p
 /// Code.
@@ -2406,6 +2412,6 @@ inline StringRef getLanguageName(FormatStyle::LanguageKind Language) {
 namespace std {
 template <>
 struct is_error_code_enum<clang::format::ParseError> : std::true_type {};
-}
+} // namespace std
 
 #endif // LLVM_CLANG_FORMAT_FORMAT_H