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Date: | 2002-06-02 (15:16) |
From: | John Max Skaller <skaller@o...> |
Subject: | Re: [Caml-list] about Obj.magic |
Pierre Weis wrote: >>An 'almost legal' use of Obj.magic is to populate an array with dummy >>values. >>For example: >> >> class Deep .. >> let a = Array.make 100 (Obj.magic 0 :> Deep) in >> let len_a = ref 0 in >> >>This is roughly as safe as an unsafe array access, >>only now the array length is a variable. >> >>-- >>John Max Skaller, mailto:skaller@ozemail.com.au >>snail:10/1 Toxteth Rd, Glebe, NSW 2037, Australia. >>voice:61-2-9660-0850 >> > >I'm afraid that this use is not ``almost legal'' and, on the contrary, >it is strongly discouraged by good programming practice! > And I'm sorry too, because it is the only way to achieve the desired effect: Ocaml could do well with a variable length array in the standard library, IMHO. -- John Max Skaller, mailto:skaller@ozemail.com.au snail:10/1 Toxteth Rd, Glebe, NSW 2037, Australia. voice:61-2-9660-0850 ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners