[Haskell-cafe] Re: Functional specification of DFS

Vimal j.vimal at gmail.com
Thu Oct 18 22:33:29 EDT 2007

> First, the suspicion that lazy evaluation may lead to a non-termination
> of such algorithm is almost surely wrong, and in any case it is against
> my religious beliefs [some twisted smiley here].

Sorry to have clubbed both lazy evaluation and non-termination. I
meant that Lazy eval could have given me a wrong answer. Recursive
procedures can give a wrong answer, if one recursive procedure's
answer is dependent on the one invoked after it.

> Then, please, would you mind stating again what do you *ultimately*
> want? A depth-first SEARCH of a goal node, if reachable, or the construction
> of the spanning tree (through backtracking). You probably said that, but
> I have probably missed that posting.

Okay, I want a DFS Spanning tree.


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