Micah Zimmerman
People claim std::variant and std::visit provide a more "TYPE SAFE" way, but in fact they just provide some checks. It simply ensures that an invalid cast like (TypeA*) type_b_object is caught either at compile time (if the type is not in the variant at all) or at runtime (if the active type does not match), rather than silently producing undefined behavior as the hand-written version would.。业内人士推荐whatsapp作为进阶阅读
，详情可参考手游
DW live updates。wps对此有专业解读
it might end up running for a very, very long time.