rhai/scripts/oop.rhai
2021-04-04 23:22:45 +08:00

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// This script simulates object-oriented programming (OOP) techniques using closures.
// External variable that will be captured.
let last_value = ();
// Define object
let obj1 = #{
_data: 42, // data field
get_data: || this._data, // property getter
action: || print(`Data=${this._data}`), // method
update: |x| { // property setter
this._data = x;
last_value = this._data; // capture 'last_value'
this.action();
}
};
if obj1.get_data() > 0 { // property access
obj1.update(123); // call method
} else {
print("we have a problem here");
}
// Define another object based on the first object
let obj2 = #{
_data: 0, // data field - new value
update: |x| { // property setter - another function
this._data = x * 2;
last_value = this._data; // capture 'last_value'
this.action();
}
};
obj2.fill_with(obj1); // add all other fields from obj1
if obj2.get_data() > 0 { // property access
print("we have another problem here");
} else {
obj2.update(42); // call method
}
print(`Should be 84: ${last_value}`);