什么时候应该使用隐式转换？ [英] When should I use implicit casting?

问题描述

当是可以安全使用隐式转换？

使用案例：我正在与一组需要被照顾特殊（对Marshal.ReleaseComObject）的COM对象。它是确定创建隐式转换回实际的COM对象的包装类包装？

什么是某些情况下，当我的不应该的使用隐式转换？

解决方案

1. 您需要执行这一投了很多。
2. 在没有办法避免的演员。
3. 这是psented作为转换/投影功能不是越多越好重新$ P $。为了把它的另一种方式，它必须是同一个对象剧组后。
4. 您可以往返原始对象。 （不含蓄，虽然。）
5. 这不会乱用现有或未来可能出现的函数重载。

我平时总结这些点为从不，但讽刺的是你的用例实际上听起来像而去......

When is it safe to use implicit casting?

Use Case: I'm working with a set of com objects that need to be taken care of specially (Marshal.ReleaseComObject). Is it OK to create a wrapper class that implicitly converts back to the actual com object wrapped?

What are some situations when I shouldn't use implicit casting?

解决方案

1. You need to perform this cast a lot.
2. There isn't a way to avoid the cast.
3. It's not better represented as a conversion/projection function. To put it another way, it's got to be "the same object" after the cast.
4. You can round-trip to the original object. (Not implicitly, though.)
5. It's not going to mess with existing or possible future function overloads.

I usually summarize these points as "never", but ironically your use case actually sounds like a goer...

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