[clang-format] preprocessor directives indentation compatible with Visual Studio Code

[EugeneZelenko]

It'll be great to have option to count # as space for IndentPPDirectives: AfterHash mode so formatting will be compatible with Visual Studio Code.

Desired code example:

#ifdef __GNUC__
#   pragma GCC diagnostic push
#   pragma GCC diagnostic ignored "-Wshadow"
#   pragma GCC diagnostic ignored "-Wsuggest-override"
#endif

[llvmbot]

@llvm/issue-subscribers-clang-format

Author: None (EugeneZelenko)

It'll be great to have option to count `#` as space for `IndentPPDirectives: AfterHash` mode so formatting will be compatible with Visual Studio Code.

Desired code example:

#ifdef __GNUC__
#   pragma GCC diagnostic push
#   pragma GCC diagnostic ignored "-Wshadow"
#   pragma GCC diagnostic ignored "-Wsuggest-override"
#endif

[owenca]

Seems PPIndentWidth: 3 will do.

[EugeneZelenko]

PPIndentWidth: 3 works properly only for first nesting level, but not for deeper levels:

#ifdef __GNUC__
#   pragma GCC diagnostic push
#   pragma GCC diagnostic ignored "-Wshadow"
#   ifdef TEST
#      pragma GCC diagnostic ignored "-Wsuggest-override"
#   endif
#endif

Visual Studio Code:

#ifdef __GNUC__
#   pragma GCC diagnostic push
#   pragma GCC diagnostic ignored "-Wshadow"
#   ifdef TEST
#       pragma GCC diagnostic ignored "-Wsuggest-override"
#   endif
#endif