You could also just write it using outer constructors. It is slightly more
verbose, but cleans up the A type nicely.
type A{T}
x::T
end
function A{T<:Number}(y::T)
y < 0 ? A{T}(zero(y)) : A{T}(y)
end
function A(y::Char)
y == 'a' ? A{Char}('b') : A{Char}(y)
end
julia> A('a')
A{Char}('b')
julia> A('C')
A{Char}('C')
julia> A(-100)
A{Int64}(0)
julia> A(10.4)
A{Float64}(10.4)
Cheers,
Kevin
On Fri, May 8, 2015 at 1:51 AM, Toivo Henningsson <toivo....@gmail.com>
wrote:
> I think this is fine. You could also have a helper function that does the
> checking and is called by the inner constructor. If you define it inside
> the type it will only be accessible to the inner constructor (and other
> functions within the type).
