getter and setter syntax

[Sha]

Hi,

I am looking at these examples of getter and setter syntax in Lemon, but I do not understand it well nor can I figure out its purpose as to when it should be used.

Can someone please explain it to me?

Thanks

~ sha

// --- Getter

def f(var x) {  // The value of x is the original value of a, in this case nil

  return 100;   // The return value is the new value of a

} 

@getter(f) 

var a;    // same as: @f var a

a = 1;

print(a); // No matter what the value of a is, it will always output 100

// --- Setter

def g(var y){    // The value of y is assigned to the value of b, this time is 1

  return 200;    // The return value is the new value of b

}

@setter(g) 

var b;

b = 1;

print(b);  // output 100

[admin]

It's syntax sugar for getter and setter, if you don't know what getter and setter is, you should google it.

[Sha]

I have only used getters and setters in the context of a class, never in the context of a free standing function as the example suggests.

My (limited) understanding of Python syntax of @property comes close to what Lemon has to offer. I will keep on Googling though.

I usually do not ask a question on this forum without first doing some basic research ... my apologies if they sound very basic for you.

~ sha

[admin]

the module is also a scope, every lemon file is a module, so the bare variable is also a property of module. the getter and setter also working with class. example

def g(var x) {
        return self.y; // self is Foo instance auto binding by accessor
}

class Foo() {
        def __init__() {
                self.y = 200;
        }

        @g
        var x;
}

var foo = Foo();
print(foo.x);

[Sha]

Perfect!

Thanks for taking time to clarify.