No type promotion for arithmetics of mixed types

[favba]

Current behavior:

julia> a = Vec(1,2)
<2 x Int64>[1, 2]

julia> b = Vec(1.,2.)
<2 x Float64>[1.0, 2.0]

julia> a + b
ERROR: MethodError: no method matching +(::Vec{2, Int64}, ::Vec{2, Float64})
...

julia> a*b
ERROR: MethodError: no method matching *(::Vec{2, Int64}, ::Vec{2, Float64})
...

[KristofferC]

I think this is kind of intended. When you do SIMD stuff you want to be very explicit in my opinion and doing arithmetic between different number types is kind of rare in practice and in those cases you can always do the conversion explicitly.

[favba]

Makes sense.
And type promotion when adding a scalar already works:

julia> Vec(1.0,2.0) + 1
<2 x Float64>[2.0, 3.0]

So it is better to handle Vec conversions explicitly.