Mat(Mat) construction

[schmrlng]

julia> using FixedSizeArrays

julia> a = Mat((1,2), (3,4))
FixedSizeArrays.Mat{2,2,Int64}(
    1 3
    2 4
)

julia> Mat(a)
FixedSizeArrays.Mat{4,1,Int64}(
    1
    1
    1
    1
)

I think this last call should return a copy of a. I suspect that return :( $FSA($a_expr...) ) here should instead look something like return :( $FSA($a_expr.(1)...) ), but making that change introduces other test errors that are tricky to track down through the constructor magic. A likely related issue:

julia> Mat([1,2,3,4])  # Array{Float64,1}
FixedSizeArrays.Mat{4,1,Int64}(
    1
    1
    1
    1
)

julia> Mat([1,2,3,4]'')  # Array{Float64,2}
FixedSizeArrays.Mat{4,1,Int64}(
    1
    2
    3
    4
)

[SimonDanisch]

Okay, that's definitely a bug... Constructor magic is really just an euphomism for bad code :D
I'll look into it...

[SimonDanisch]

should be fixed by #67