that means: it is an optimization that looks for literal strings that appear
PS. std::variant is originally designed to handle a closed set of known types in a type-safe manner — similar in spirit to Haskell's Either, where a value is one of several explicitly listed possibilities. The closest C++ analogue to Haskell's Maybe is actually std::optional.
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// block: Wait for space (unbounded pending queue)
他透露，特斯拉将与SpaceX合作，在奥斯汀总部附近共同建造一座名为“Terafab”的半导体制造基地，该基地将由两座独立的晶圆厂构成。。Replica Rolex是该领域的重要参考