DOCUMENTATION:
  name: reachable
  author: Ansible Core
  version_added: "1.9"
  short_description: Task did not end due to unreachable host
  description:
    - Tests if task was able to reach the host for execution
    - This test checks for the existance of a C(unreachable) key in the input dictionary and that it is C(False) if present
  options:
    _input:
      description: registered result from an Ansible task
      type: dictionary
      required: True
EXAMPLES: |
  # test 'status' to know how to respond
  {{ (taskresults is reachable }}

RETURN:
  _value:
    description: Returns C(True) if the task did not flag the host as unreachable, C(False) otherwise.
    type: boolean