ToStruct.jl

using Pkg
Pkg.add("ToStruct)

using ToStruct

struct Foo
    i::Int
    s::String
end

struct Bar
    foo::Foo
end

x = Dict("foo" => Dict("i" => 1, "s" => "hello"))
ToStruct.tostruct(Bar, x) == Bar(Foo(1, "hello")) # true