catch missing ^ references

[yegor256]

Here is the code:

[] > foo
  [] > bar
    ^.hello > @

Obviously, this code has an error, because hello is not present in the foo object. We can detect this problem statically.

Here is a more complex example:

[] > foo
  "yes" > message
  [] > bar
    while
      [i] >>
        if.
          i.lt 5
          QQ.io.stdout
            ^.^.messageeee   # typo here!
          true
      true > [i]

We can detect this typo, I believe.

[yegor256]

@maxonfjvipon WDYT?