1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
// PR c++/94462 // { dg-do compile { target c++20 } } namespace std { struct strong_ordering { }; } namespace Synth { struct B { friend std::strong_ordering operator<=>(B, B) = default; }; struct C { friend bool operator==(C, C); }; }