Review requested:

• @nodejs/security-wg

CI: https://ci.nodejs.org/job/node-test-pull-request/64005/

@lemire is this a bug with simdutf or due to extremely old macOS in node.js infra?

12:01:06 ../deps/simdjson/simdjson.cpp:2821:10: error: expected concept name with optional arguments
12:01:06     } -> std::convertible_to<typename std::remove_cvref_t<T>::value_type>;
12:01:06          ^
12:01:06 1 error generated.

It is likely that you are trying to compile C++20 code with a compiler system that is too old to support C++20 properly.

I will issue a patch release that checks for the LLVM version and does not rely on what the compiler claims.

@anonrig If I am reading this right, LLVM did something dirty where they claimed that they supported C++20 when they did not. But we can route around this by manually checking the LLVM version.

simdjson/simdjson#2313

Closed in favor of #56250.