;;;; cl-scopes/csys/program - common and general csys program definitions

(defpackage :scopes/csys/program
  (:use :common-lisp)
  (:local-nicknames (:actor :scopes/core/actor)
                    (:csys :scopes/csys)
                    (:util :scopes/util))
  (:export #:basic-0))

(in-package :scopes/csys/program)

;;;; basic-0: minimal recursive system

(defun basic-0 ()
  (csys:make-program
    (list '(:c00 :initial) (csys:std-proc :actions (actions-zero-initial))
          '(:e01 :initial) (csys:eff-proc :actions (csys:basic-actions))
          ':default (csys:std-proc :actions (csys:basic-actions)))))

(defun actions-zero-initial () 
  (util:plist-merge (csys:basic-actions) 
                    (list :next (next-zero-initial))))

(defun next-zero-initial ()
  (lambda (msg scope) 
    (let ((self actor:*self*))
      (csys:send-create self :cat :e01 :connect :succ)
      (csys:send-create self :cat :s01 :loc "0-1" :connect :pred)
      (csys:send-connect self self :op (csys:multiply -1))
      ;; switch :active
      nil)))