itch.io

Another example with two equivalent Set, and an error because Get does not depend on the test: AT treestand.

redescribe = auto_beta
: match "get ladder"  {
   : if (is_at "treestand" && is_beside "ladder") {
      : set_graphic graphic = "treestand2"  target = "treestand" ;
   }
   : get "ladder" ;
   : done ;
}
> GET    LADDE AT treestand
              PRESENT ladder
              NOTCARR ladder
              SET has_done_something_
              SET has_done_something_
              LET 18 255 LET 19 10
              GET ladder
              DONE