good look -- thanks
On Sunday, October 18, 2015 at 9:13:14 PM UTC-4, Páll Haraldsson wrote:
>
> On Monday, October 19, 2015 at 1:00:33 AM UTC, Páll Haraldsson wrote:
>>
>> On Tuesday, September 1, 2015 at 1:08:38 PM UTC, Jeffrey Sarnoff wrote:
>>>
>>> import Base:(+),(*),(-)
>>>
>>> julia> 2+3+4
>>> 9
>>> julia> (+){T<:Integer}(a::T,b::T,c::T) = ((a+b)+c)+1
>>> julia> 2+3+4
>>> 10
>>>
>>> julia> 2-3-4
>>> -5
>>> julia> (+){T<:Integer}(a::T,b::T,c::T) = ((a-b)-c)-1
>>> julia> 2-3-4
>>> -5
>>>
>>> Are (+),(*) the only ops that can be n-ary specialized?
>>>
>>
>> No, it seems not.
>>
>
> I misread your question for "are (+),(*) the only ops n-ary specialized
> functions?".
>
> I didn't work through, why your "((a-b)-c)-1" didn't work as expected (but
> I wander why you are doing this.., just a test, like for me, seeing what is
> possible in Julia..?). I'm sure it has something to do with this:
>
> julia> edit(-, (Float64, Float64, Float64))
>> ERROR: no method found for the specified argument types
>> in which at ./reflection.jl:293
>> in edit at interactiveutil.jl:58
>>
>
> If this had been defined analogous to for + I guess it would have worked
> for you. I'm sure the n-ary minus is just not needed for Julia (I'm sure
> what I found is just for performance optimization), possibly even dangerous
> (- is for floating point..).
>
> --
> Palli.
>
>
