| Issue |
146838
|
| Summary |
[Clang] Implement the `__builtin_type_order` intrinsic for P2830R10 Constexpr Type Ordering
|
| Labels |
clang:frontend,
c++26
|
| Assignees |
|
| Reporter |
frederick-vs-ja
|
Recently, GCC & libstdc++ has implemented [P2830R10](https://wg21.link/p2830r10) Constexpr Type Ordering (per gcc-mirror/gcc@29c7661c6f92d80f63a9a3cc37f3dc790a161f3f). A new intrinsic `__builtin_type_order` is added for this. It's probably better to have this intrinsic in Clang to improve compatibility with GCC.
If I understood correctly, `__builtin_type_order(T, U)` returns a `std::strong_ordering` value equal to `strcmp(mangled-name(T), mangled-name(U)) <=> 0`.
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