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Object-oriented design patterns in the kernel, part 1Object-oriented design patterns in the kernel, part 1Posted Jun 1, 2011 20:40 UTC (Wed) by michaeljt (subscriber, #39183)Parent article: Object-oriented design patterns in the kernel, part 1
Surely one of the most important reasons for using a real function as a default and not a NULL pointer (see [ http://en.wikipedia.org/wiki/Null_Object_pattern ] by the way) is that having every caller check for NULL adds the potential for lots of additional typing mistakes or other errors in the caller code.
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Object-oriented design patterns in the kernel, part 1 Posted Jun 1, 2011 22:32 UTC (Wed) by martinfick (subscriber, #4455) [Link]
I think that would fall under Neil's generalization that:
> In general, any testing performed by the caller before calling a method can be seen as an instance of the "mid-layer mistake" discussed in a previous article.
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