feature request from r5rs

Narang <[email protected]>
Newsgroups gmane.comp.java.sisc.devel
Message-ID <[email protected]>
From r5rs:
    * Some implementations may implement ``implicit forcing,'' where the value of a promise is forced by primitive procedures like cdr and +:

      (+ (delay (* 3 7)) 13)          ===>  34


Can this feature be added to sisc? thoughts.



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