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最新推荐文章于 2025-08-09 18:46:25 发布

原创最新推荐文章于 2025-08-09 18:46:25 发布 · 513 阅读

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#namespaces #compiler #list

本文探讨了使用声明与使用指令的区别及其安全性。使用声明能够精确显示所引入的名称，并在出现本地名称冲突时由编译器发出警告。而使用指令会引入所有名称，即使有些名称可能不需要，并且在发生本地名称冲突时会覆盖命名空间版本而不发出警告。

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Generally speaking, the using-declaration is safer to use because it shows exactly what names you are
making available. And if the name conflicts with a local name, the compiler lets you know. The using-directive
adds all names, even ones you might not need. If a local name conflicts, it overrides the namespace version,
and you won't be warned. Also, the open nature of namespaces means that the complete list of names in a namespace
might be spread over several locations, making it difficult to know exactly which names you are adding.