Re: Binary search tree

Eric Bezault <[email protected]>
Newsgroups gmane.comp.lang.eiffel.gobo.devel
Message-ID <[email protected]>
Hi Daniel,

Is there a reason why `void_is_valid_key' is False
in DS_BINARY_SEARCH_TREE? For example in DS_HASH_TABLE
it is possible to have void keys. And the algorithms
seem to work with void anyway since `void_is_valid_key'
is True in DS_BINARY_SEARCH_TREE_SET. I think that it
would make the interface simplier if we could get rid
of this feature `void_is_valid_key'.

Apart from that, I still need to improve one thing and
then it will be ready to be committed in SVN. The
problem is with `equality_tester'. This is assumed to
be used in many places. Just look at the header comments
of `is_subset', `interset', etc. in DS_BINARY_SEARCH_TREE_SET.
But in fact it uses KL_COMPARATOR.order_equal. I'm currently
trying to use the KL_COMPARATOR as if it was a
KL_EQUALITY_TESTER of `equality_tester' (in other words
`comparator' and `equality_tester' would be the same
object).

-- 
Eric Bezault
mailto:[email protected]
http://www.gobosoft.com

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