Daniel-Nikpayuk_SICP-Solutions/Chapter 3/3.5/exercise-3.67 (all pairs)/exercise.lsp
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;; Copyright 2015 Daniel Nikpayuk
;;
;; This file is part of SICP Solutions.
;;
;; SICP Solutions is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License
;; as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
;;
;; SICP Solutions is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
;; of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License along with SICP Solutions. If not, see
;; <http://www.gnu.org/licenses/>.
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(define (all-pairs s t)
 (cons-stream
  (list (stream-car s) (stream-car t))
  (interleave
   (stream-map (lambda (x) (list x (stream-car t))) (stream-cdr s))
   (interleave
    (stream-map (lambda (y) (list (stream-car s) y)) (stream-cdr t))
    (all-pairs (stream-cdr s) (stream-cdr t))
   )
  )
 )
)

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(all-pairs integers integers)

