836-no-path-exists2.yaml

version: 1
name: Builtin pathfinding, unreachable goal, enclosed goal
description: |
  There is infinite area to explore, so
  this will fail to terminate unless
  a limit is set on the max distance.

  In this scenario, we fall back onto the internal distance limit.
  Normally, it would be very expensive to allow this goal condition
  check to run upon every tick. But in this case, we should
  have won the scenario by the first tick.
creative: false
objectives:
  - goal:
      - Flower must not be reachable.
    condition: |
      as base {
        nextDir <- path (inL ()) (inR "flower");
        return $ case nextDir (\_. true) (\_. false);
      };
solution: |
  noop;
entities:
  - name: wayfinder
    display:
      char: 'w'
    description:
      - Enables `path` command
    properties: [known, pickable]
    capabilities: [path]
robots:
  - name: base
    dir: east
    devices:
      - treads
      - logger
      - ADT calculator
      - dictionary
      - wayfinder
world:
  palette:
    'B': [grass, null, base]
    '.': [grass]
    'x': [stone, mountain]
    'f': [grass, flower]
  upperleft: [0, 0]
  map: |
    ......xxxxx
    ......x...x
    ..B...x.f.x
    ......x...x
    ......xxxxx