clang-format and the --Wno-error=unknown option

[H-G-Hristov]

Feature Request

Does the extension support this option:

  --Wno-error=<value>            - If set don't error out on the specified warning type.
    =unknown                     -   If set, unknown format options are only warned about.

By default clang-format will report an error and break any formatting scripts (like the one we use) if it has a unknown option in the config file .clang-format like any new options not available in the currently bundled release.

I think this should be an on-off switch which should be enabled by default.

[H-G-Hristov]

An example .clang-format:

BasedOnStyle: Google
Standard: c++20
# Available in Clang-Format 15
IndentRequiresClause: true
RequiresClausePosition: OwnLine
# Available in Clang-Format 16
RequiresExpressionIndentation: OuterScope

The last line breaks the format request.

By passing --Wno-error=unknown and ignoring the warnings we can make the above .clang-format work.

[sean-mcmanus]

We've added --Wno-error=unknown as a default. I've created #10102 to track adding a setting to make that configurable.

[sean-mcmanus]

Fixed with 1.13.4 (pre-release): https://github.com/microsoft/vscode-cpptools/releases/tag/v1.13.4