Rudder

We want :

# non strict structure
struct A {
  a: String,
  b: Integer
}
# implicit type structure
struct A {
  a, b # 2 strings
}

We could also have an implicit struct declaration during definition

# magic
let var.a 
let var.b
# classic
let var.a = "ok" 
let var.b = "ko" 
# classic 2
let var = { a = "ok", b= "ko" }