Hi Jake,
your example works because you don't leave Julia session. `foo` is defined
in this session, so the the pair of module name and function name is enough
to get function object. If you save serialized function (or just retype it
byte by byte) , it won't work. Here's an example:
Session #1:
julia> io = IOBuffer()
IOBuffer(data=Uint8[...], readable=true, writable=true, seekable=true,
append=false, size=0, maxsize=Inf, ptr=1, mark=-1)
julia> foo(x) = x + 1
foo (generic function with 1 method)
julia> serialize(io, foo)
julia> takebuf_array(io)
9-element Array{Uint8,1}:
0x13
0x02
0x23
0x2f
0x02
0x03
0x66
0x6f
0x6f
julia>
Session #2:
julia> data = Uint8[0x13, 0x02, 0x23, 0x2f, 0x02, 0x03, 0x66, 0x6f, 0x6f]
9-element Array{Uint8,1}:
0x13
0x02
0x23
0x2f
0x02
0x03
0x66
0x6f
0x6f
julia> io = IOBuffer(data)
IOBuffer(data=Uint8[...], readable=true, writable=false, seekable=true,
append=false, size=9, maxsize=Inf, ptr=1, mark=-1)
julia> bar = deserialize(io)
(anonymous function)
julia> bar(1)
ERROR: function foo not defined on process 1
in error at error.jl:21
in anonymous at serialize.jl:398
julia>
On Friday, August 14, 2015 at 5:49:55 PM UTC+3, Jake Bolewski wrote:
>
> Andrei Zh
>
> I'm confused. Have you actually tried?
>
> julia> io = IOBuffer()
> IOBuffer(data=UInt8[...], readable=true, writable=true, seekable=true,
> append=false, size=0, maxsize=Inf, ptr=1, mark=-1)
>
> julia> foo(x) = x + 1
> foo (generic function with 1 method)
>
> julia> serialize(io, foo)
>
> julia> seekstart(io)
> IOBuffer(data=UInt8[...], readable=true, writable=true, seekable=true,
> append=false, size=9, maxsize=Inf, ptr=1, mark=-1)
>
> julia> baz = deserialize(io)
> foo (generic function with 1 method)
>
> julia> baz(1)
> 2
>
> The serialization code won't recursively serialize all the of the
> functions dependencies so you will have to send/serialize the code that
> defines the environment (types, constants, Packages, etc).
>
