https://answer.freetools.me/tags/%E7%B1%BB%E5%9E%8B%E6%93%A6%E9%99%A4/ Recent content in 类型擦除 on Answer Hugo -- 0.152.2 zh-cn Fri, 13 Mar 2026 08:41:07 +0800 https://answer.freetools.me/%E6%B3%9B%E5%9E%8B%E7%9A%84%E4%B8%89%E7%A7%8D%E5%91%BD%E8%BF%90%E4%B8%BA%E4%BB%80%E4%B9%88%E5%90%8C%E4%B8%80%E4%B8%AA%E6%A6%82%E5%BF%B5%E5%9C%A8%E4%B8%8D%E5%90%8C%E8%AF%AD%E8%A8%80%E4%B8%AD%E8%B5%B0%E5%90%91%E4%BA%86%E6%88%AA%E7%84%B6%E4%B8%8D%E5%90%8C%E7%9A%84%E5%AE%9E%E7%8E%B0%E9%81%93%E8%B7%AF/ Fri, 13 Mar 2026 08:41:07 +0800 https://answer.freetools.me/%E6%B3%9B%E5%9E%8B%E7%9A%84%E4%B8%89%E7%A7%8D%E5%91%BD%E8%BF%90%E4%B8%BA%E4%BB%80%E4%B9%88%E5%90%8C%E4%B8%80%E4%B8%AA%E6%A6%82%E5%BF%B5%E5%9C%A8%E4%B8%8D%E5%90%8C%E8%AF%AD%E8%A8%80%E4%B8%AD%E8%B5%B0%E5%90%91%E4%BA%86%E6%88%AA%E7%84%B6%E4%B8%8D%E5%90%8C%E7%9A%84%E5%AE%9E%E7%8E%B0%E9%81%93%E8%B7%AF/ 从1975年ML首次引入参数化多态开始，泛型概念走过了半个世纪的演进历程。然而令人惊讶的是，同一个"泛型"概念在不同语言中却演化出了截然不同的实现策略：C++和Rust选择了单态化、Java选择了类型擦除、.NET选择了完全具体化、Go选择了GCShape模板化。本文深入剖析这四种实现策略的技术本质、设计决策背后的权衡，以及它们对编译时间、运行时性能和二进制大小的具体影响。