cuda-api-wrappers

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Should cuda::device::count() return an std::size or a device::id_t?

std::size_t is semantically more accurate, i.e. it's the size of a set of devices. It's non-negative. And in C++ we use this types for this purpose a lot.

cuda::device::id_t is what the underlying API returns, so it has the appropriate range; it's smaller-sized; and it won't give you warnings when you compare device::id_t's to it (although it will give you warnings if you cmpare unsigned indices to it...)

Which should it be?