[Feature] Add support for std args c++26/gnu++26/c++2c/gnu++2c/c++23preview

[sean-mcmanus]

Request Overview

The change would be similar to the PR that added c++23 at #2476 . I could do it myself depending on the ETA your team expects to be able to do it.

The corresponding vscode-cpptools change is at https://github.com/microsoft/vscode-cpptools/pull/13608/files and microsoft/vscode-cpptools-api#60 for C/C++ extension version 1.26.0. The 6.3 version of vscode-cpptools has not yet been published to npm but should be available.

Without this change, CMake Tools incorrectly reports a project using c++23 as using c++latest with MSVC mode and clang/gcc modes reports c++23 instead of c++26.

There's a Makefile Tool issue at microsoft/vscode-makefile-tools#735 .

Additional Information

No response

[sean-mcmanus]

@Amy-Li03 Why is this marked as Blocked? Can I submit a PR to fix it or did the CMake Tools team have an ETA on when they would have time to get to it?

[Amy-Li03]

@sean-mcmanus It seems the Blocked status is default, and we are very happy for you to provide a PR to fix it!

[sean-mcmanus]

This is actually largely a no-op so I'm closing it (I still have a PR, but it's only minor changes). The shipping product already correctly handles c++26/etc. -- the issue I was hitting previously was due to cmake itself using c++latest instead of c++23preview.