Top-Level cv-Qualifiers in Function Parameters

最新推荐文章于 2020-10-20 14:59:56 发布

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最新推荐文章于 2020-10-20 14:59:56 发布

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分类专栏： C/C++ 文章标签： function parameters types c

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本文深入探讨了C++中cv-qualifiers（const和volatile）在函数参数声明中的角色及其应用。通过具体实例展示了如何通过参数类型差异仅在cv-qualifiers上进行区分来重载函数，并解释了为什么C++在确定函数签名时会忽略这些cv-qualifiers，而C语言不会忽略它们。文章还提供了相关PDF文件的链接以供进一步研究。

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关键字:volatile const

Forthe past few months, I’ve been discussing the role of cv-qualifiers (the keywords constand volatile) appearing in function parameter declarations. I’ve been focusing on how you can overload functions whose parameter types differ only in their use of cv-qualifiers, 1 and why you might want to do so.2,3 Although cv-qualifiers that appear in a parameter declaration usually become part of the function’s signature, they’re not always part of the signature. There are times when C++ ignores cv-qualifiers in parameter declarations as it determines a function`s signature. In contrast, C never ignores cv-qualifiers in parameterdeclarations. This subtle difference between C++ and C is my topic for this month.