Is there any plan to move Velox from C++20 to C++23?

[PingLiuPing]

Velox currently builds with C++20.

set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED TRUE)

I wanted to ask whether there is any plan or timeline to move Velox from C++20 to C++23.

Thanks.

[PingLiuPing]

@czentgr @mbasmanova

[mbasmanova]

CC: @kgpai @pedroerp

[pedroerp]

@PingLiuPing is C++23 supported by the clang and gcc compiler versions we use today in CI?

[PingLiuPing]

@pedroerp I compiled the Velox code with Clang 17 on macOS, which is the same Clang version currently used in CI. From the compiler’s perspective, C++23 is supported, although some code changes are required to make the codebase compile successfully with C++23.

For Linux, I see that CI is currently using GCC 14. According to the GCC C++23 status page, GCC 14 already supports most C++23 features. But I haven’t verified the build with GCC 14 myself, as I don’t currently have access to such an environment.

[pedroerp]

@PingLiuPing That's cool. If our compilers already support it and it's just a matter of code changes, agreed that this is something to consider. Maybe we can discuss this in the next Velox OSS bi-weekly meeting?