However, it does look like this use pattern does resolve to 'getindex',
*julia> **dump(:( Int[1, 2, 3, 4] ))*
Expr
head: Symbol ref
args: Array(Any,(5,))
1: Symbol Int
2: Int64 1
3: Int64 2
4: Int64 3
5: Int64 4
typ: Any
*julia> **getindex(Int, 1, 2, 3, 4)*
*4-element Array{Int64,1}:*
* 1*
* 2*
* 3*
* 4*
So now I am not so sure about my claim that most concatenation doesn't go
through function calls. However, I don't think that the rest of the
concatenating heads (:vect, :vcat, :typed_vcat, etc.) lower to getindex:
*julia> **@which([1, 2, 3, 4])*
*vect{T}(X::T...) at abstractarray.jl:13*
*julia> **@which([1; 2; 3; 4])*
*vcat{T<:Number}(X::T<:Number...) at abstractarray.jl:643*
they seem instead to call the type 'vect', 'vcat', etc. itself on the array
arguments.
