Generators

Generators are functions that effectively pause and return a value whenever a yield statement is hit. They are defined just like functions, but use the generator keyword instead of fun.

generator int generator_func(int max)
{
    for (let i = 0; i <= max; i++)
        yield i;
}

You can use a generator by calling it, then calling MoveNext on the object that it returns until it returns zero. When it returns 0 it means that the function has returned.

let gen = generator_func(10);
gen.MoveNext();
let return_value = gen.Current();//this gets the value last yielded

This generator would return 0 the first time MoveNext is called, then 1 the next time, then 2, so on and so forth until it hits the max value.

You can also reset the generator back to the beginning by calling Reset

gen.Reset();