I don't see that as a viable option either. I am trying to find out which other operations would do such promotion, but so far the relevant one seems to be only division, I can handle that.
Now, in terms of hypothetical workarounds, what about having a macro to override type promotion? Would that make sense? I don't know Julia internals, but would this be difficult to implement? Of course, in such case operations must happen between elements of the same (scalar) type, otherwise it should throw an error. ------------------------------------------ Carlos On Fri, Apr 4, 2014 at 5:42 PM, Stefan Karpinski <[email protected]>wrote: > The change you want would be a one-line change: > > https://github.com/JuliaLang/julia/blob/master/base/int.jl#L50 > > However, that change would affect all code using division of integers, > which seems likely to wreak havoc. As others have pointed out, the operator > for truncated integer division is div; the operator for floored integer > division is fld. > > > On Fri, Apr 4, 2014 at 5:09 AM, Carlos Becker <[email protected]>wrote: > >> I've seen previous posts in this list about this, but either I missed >> some of them or this particular issue is not addressed. I apologize if it >> is the former. >> >> I have a Uint8 array and I want to divide (still in Uint8) by 2. This is >> very handy when dealing with large images: no need to use more memory than >> needed. >> So, for example: >> >> A = rand(Uint8, (100,100)); # simulated image >> >> b = A / uint8(2) >> >> typeof( b ) # ==> returns Array{Float32,2} >> >> >> I understand why one may want that, but is there a way to override it and >> do the plain, element-wise uint8-by-uint8 division? >> (ie ignore promotion rules) >> >> Thanks. >> > >
