Hello everyone,
in the example below the initCar proc creates a new car and defines sensible
default values. Now I decide to extend the car with a new attribute maxSpeed:
Natural. By default the compiler will set the value of maxSpeed to 0 which
doesn't make sense for cars. As module author I'm in charge to set a default
for maxSpeed in the constructor initCar. With a lot of attributes one can loose
track of them and I may forget to init the car with a maxSpeed of 100 . Hence
my question:
Does Nim provide a pragma to ensure that all attributes of an object are
provided during its creation using the Car()-syntax (here in initCar)?
type
Car = object
numOfWheels: Natural
numOfDoors: Natural
color: string
hadAccident: bool
distanceDriven: Natural
# and many more attributes ...
# create car with default values provided by module author
proc initCar(): Car =
Car(
numOfWheels: 4,
numOfDoors: 4,
color: "red",
hadAccident: false,
distanceDriven: 0
)
var c = initCar()
# user wants a blue car
c.color = "blue"
Run
