What is the purpose of an extra Int argument in ScalFun?

[twesterhout]

The first argument to ScalFun is an Int:
https://github.com/wellposed/hblas/blob/master/src/Numerical/HBLAS/BLAS/Internal/Level1.hs#L66
I'm wondering what its purpose is, because it could, I think, be easily extracted from the passed vector. And if one wants to scale only a part of the vector, it's easy enough to create a slice and scale it instead. Am I missing something here?

[cartazio]

woops, i lost track of old tickets :)))
i'll need to reload this stuff in my head, but i believe this was all to model out very precisly the semantics of the C ffi for blas