🚀 go-pugleaf

kloppen@gmdzi.UUCP (Jelske Kloppenburg) writes:
:ugprussa@cs.Buffalo.EDU (Michal Prussak) writes:

:> Wirth describes in his book "Algorithms and Data Structures" (from 1986)
:> a recursive data type (p 173):
     ^^^^^^^^^ ^^^^ ^^^^
RECURSIVE DATA TYPE ???
:> TYPE
:>    ped = RECORD
:>      CASE known: BOOLEAN OF
:>         TRUE: name: ARRAY[1..10] OF CHAR |
:>            FALSE: father, mother: ped;   <--- recursive fields
:>         END (* case *);                       ^^^^^^^^^
:>    END (* record *);
:
:That can not work...

DYNAMIC MEMORY ALLOCATION (not recursive)
:TYPE
:   LinkPTR = POINTER TO Link;
:   Link = RECORD
:             Text: String;
:             Count: CARDINAL;
:             Left, Right: LinkPTR
:   END;

This is dynamic memory allocation... but this is not a RECURSIVE
data type.  Personally, I don't see what the use of a recursive
data structure is.  Dynamic memory allocation is of obvious
worth (no pun intended), but I don't see what the hell you would
do with a recursive boolean expression?....... huh?

Please Explain if you are still there.

Hmmm...

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