Implicit declarations?
======================

Is it possible?

Syntax test:

    # For a single variable it works
    n = 0
    b = false
    s = ""
    l = [ 1 2 ]

    # Array access can be distinguished:
    arr i = 0

    # But how about multi-value declarations?
    # Maybe use [] syntax?
    [ i j ] = get_indices

Related:

- Perhaps turn `int` and `bool` into regular types?
  Pre-requisites:
    - Add identity-less types
    - Make them UpperCase (Int, Bool, etc.)
    - Add to builtin declarations