Andrea Faulds wrote on 06/09/2015 17:20:
If we hadn't seen the class declaration at the top which makes `KeyType` and `ValueType` be type parameters, we might not realise they weren't ordinary classes or interfaces when we looked at `__construct`. The -Type suffix you've used helps a little, but that's a convention, and isn't guaranteed to be used. Also, in some existing projects, there might be classes with that suffix.
As I understand it, the convention in a lot of languages is that type parameters are a single upper-case letter. I'm not sure if any enforce this restriction, though, and a sigil does seem more flexible and readable.
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