diff options
Diffstat (limited to 'sly/actor.scm')
| -rw-r--r-- | sly/actor.scm | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sly/actor.scm b/sly/actor.scm index fd21a64..5b6d7e3 100644 --- a/sly/actor.scm +++ b/sly/actor.scm @@ -37,6 +37,7 @@ call-with-actor action-lift + action-effect-lift idle both then @@ -106,6 +107,18 @@ transformed." effects (apply proc object args))))) +(define (action-effect-lift proc) + "Create an action constructor from PROC, a procedure of any number +of arguments, whose first two arguments are the world being +transformed and the game object being acted upon. The actions +returned from this new procedure specify that PROC should be performed +as an effect on the world, and do not change the actor itself." + (lambda args + (lambda (world effects object) + (values #f + (list (lambda (world) (apply proc world object args))) + object)))) + (define (idle world effects object) "Do nothing. Do not change OBJECT nor add anything to EFFECTS." (values #f effects object)) |