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That means Option must store an explicit discriminant.。PDF资料是该领域的重要参考
，更多细节参见wps下载
Материалы по теме:。关于这个话题，PDF资料提供了深入分析
Any function that uses core::mem::transmute or other forms of type punning fails to compile.
Guido van Rossum Interviews Thomas Wouters (Python Core Dev)
· 陈静 · 来源：tutorial资讯