Example does not run

First example:

fn fib n:
  if n < 2:  n
      else: (n - 1 -> fib) +
            (n - 2 -> fib)

[0:10] -> * fib -> print

$ clio run eg.clio 

 At file "eg.clio" when calling print:

   4 │             (n - 2 -> fib)
   5 │ 
   6 │ [0:10] -> * fib -> print
                          ^ At line 6 char 19

 Exception: BigInt is not defined

Installed as in instruction: npm i -g clio-lang

[pouya-eghbali]

Ranges are lazy in Clio, here’s why it prints [object Object] (it shouldn’t, i’ll fix it soon):

1. [0:10] compiles to

LazyRange({
    start: 0,
    end: 10,
    step: 1,
    get: (i, self) => self.start + self.step * i
})

1. When you map fib to this LazyRange object it becomes:

LazyRange({
    start: 0,
    end: 10,
    step: 1,
    get: (i, self) => fib(self.start + self.step * i)
})

1. When you call print on this object, it outputs [object Object] because it is an object. However if you map print to it, it will print the contents correctly. Anyways this isn’t the correct behavior and should be fixed, I’ll look into it, as I said I’m a little busy with the new parser and when I finish I will have more time to fix these issues.

I’m afraid most of these will need rewriting so I prefer if I don’t touch the current built-ins / definitions. Also, thanks for testing Clio and reporting the bugs, makes me happy to see people are interested, hopefully we’ll be able to use Clio in production soon, I have lots of plans for this language.

[fuzzthink]

Ah, issue was node was v8.15.0. Works with node v10.14.

But why output is [object Object] when output in online editor prints the array?