private struct fields

[cburgdorf]

What was wrong?

As described in #236 we need support for private fields in structs.

How was it fixed?

Public fields now need to be declared with the pub modifier, otherwise they default to private fields.
If a struct contains private fields it can not be constructed directly except from within the
struct itself. The recommended way is to implement a method new(...) as demonstrated in the
following example.

struct House:
    pub price: u256
    pub size: u256
    vacant: bool

    pub fn new(price: u256, size: u256) -> House
      return House(price=price, size=size, vacant=true)

contract Manager:

  house: House

  pub fn create_house(price: u256, size: u256):
    self.house = House::new(price, size)
    let can_access_price: u256 = self.house.price
    # can not access `self.house.vacant` because the field is private

[sbillig]

Looks great! 🤠

[sbillig]

This doesn't have to be fatal.

[cburgdorf]

eagle eyes! 🦅