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In answering this question (https://stackoverflow.com/questions/352317/c-coding-question#352327), it got me wondering…
Is there any danger in regarding a static class as being equivalent to a non-static class instatiation that implements the singleton pattern?
The only thing that seems immediately apparent to me is that a static class is basically just a collection of scoped functions (explicitly avoiding ‘methods’ here) and a singleton is still something you can instantiate, even if you can only have 1. 1 > 0.
You can pass a singleton as an argument to something that expects an object of a certain interface, you cannot pass a static class anywhere (except through some reflection trickery)