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Avoid casts whenever practical, especially dynamic_casts in performance-sensitive code. If a design requires casting, try to develop a cast-free alternative.
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When casting is necessary, try to hide it inside a function. Clients can then call the function instead of putting casts in their own code.
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Prefer C++-style casts to old-style casts. They are easier to see, and they are more specific about what they do.
原文链接: https://www.cnblogs.com/zhtf2014/archive/2011/03/30/1999648.html
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