the derivative function, the nullability check, the rewrite rules - they’re all structural recursion over this type. F#‘s pattern matching makes this natural to write and natural to read. and when you need raw performance in the hot loop, SRTP, inlining, and even raw embedded IL are right there.
正月里的湖南湘西十八洞村，气温逐渐转暖，村里热闹非凡。
，更多细节参见体育直播
至于其他潜在竞争者，则各有优劣。
It’s worth highlighting that “self-contained” doesn’t mean “isolated”. It’s desirable for a module to collaborate with other modules, but the communication should represent business processes interacting with each other (or a process with subprocesses).