diff options
Diffstat (limited to 'src/algebra/ystream.spad.pamphlet')
| -rw-r--r-- | src/algebra/ystream.spad.pamphlet | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/src/algebra/ystream.spad.pamphlet b/src/algebra/ystream.spad.pamphlet index 2f63b7bb..a085c647 100644 --- a/src/algebra/ystream.spad.pamphlet +++ b/src/algebra/ystream.spad.pamphlet @@ -38,20 +38,22 @@ ParadoxicalCombinatorsForStreams(A):Exports == Implementation where ++ a list of n streams and returns a list of n streams. Implementation ==> add + import %head: ST A -> A from Foreign Builtin + import %tail: ST A -> ST A from Foreign Builtin Y f == - y : ST A := CONS(0$I,0$I)$Lisp + y : ST A := %makepair(0$I,0$I)$Foreign(Builtin) j := f y - RPLACA(y,frst j)$Lisp - RPLACD(y,rst j)$Lisp + %store(%head y,frst j)$Foreign(Builtin) + %store(%tail y,rst j)$Foreign(Builtin) y Y(g,n) == - x : L ST A := [CONS(0$I,0$I)$Lisp for i in 1..n] + x : L ST A := [%makepair(0$I,0$I)$Foreign(Builtin) for i in 1..n] j := g x for xi in x for ji in j repeat - RPLACA(xi,frst ji)$Lisp - RPLACD(xi,rst ji)$Lisp + %store(%head xi,frst ji)$Foreign(Builtin) + %store(%tail xi,rst ji)$Foreign(Builtin) x @ |