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//Define our object classes, you can
//also declare these outside of the nools
//file by passing them into the compile method
define Fibonacci {
value:-1,
sequence:null
}
define Result {
value : -1
}
rule Recurse {
when {
//you can use not or or methods in here
not(f : Fibonacci f.sequence == 1);
//f1 is how you can reference the fact else where
f1 : Fibonacci f1.sequence != 1;
}
then {
assert(new Fibonacci({sequence : f1.sequence - 1}));
}
}
rule Bootstrap {
when {
f : Fibonacci f.value == -1 && (f.sequence == 1 || f.sequence == 2);
}
then{
modify(f, function(){
this.value = 1;
});
}
}
rule Calculate {
when {
f1 : Fibonacci f1.value != -1 {sequence : s1};
//here we define constraints along with a hash so you can reference sequence
//as s2 else where
f2 : Fibonacci f2.value != -1 && f2.sequence == s1 + 1 {sequence:s2};
f3 : Fibonacci f3.value == -1 && f3.sequence == s2 + 1;
r : Result
}
then {
modify(f3, function(){
this.value = r.result = f1.value + f2.value;
});
retract(f1);
}
}
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