================
@@ -2886,6 +2886,49 @@ class CXXPseudoDestructorExpr : public Expr {
}
};
+/// Represents a C++26 __builtin_type_order(T, U) expression. Used to implement
+/// std::type_order.
+class BuiltinTypeOrderExpr final : public Expr {
----------------
Tsche wrote:
That too would require special casing for this one of a kind builtin. We
currently only support bool and size_t as return types, not int.
Returning size_t 1/2/3 and then in library `__builtin_type_order(U, T) <=> 1`
could work (and I do have an implementation for that) but I find that strange.
Generally speaking I don't feel great about returning magic numbers while also
breaking libstdc++ compatibility for the sake of a smaller patch. Especially
considering that we already have utilities to look up `std::strong_ordering`
since we need it for the 3way comparison anyway.
https://github.com/llvm/llvm-project/pull/216462
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