From: Manfred Doudar (manfred.doudar_at_[hidden])
Date: 2004-11-14 21:35:35
In taking a holistic look at some of the work I do, I've come
to realize a need for a "transparent" data type, and wondering
whether or not it exists.
As all of you would have experienced, any organization has such
a representation of such a type; be it called:
"Null value", "Missing value", "Fill value", "Infinity" ,
What I am hoping for is support for such an representation,
with existing containers and algorithms; such that if you
perform any mathematical operation, (arithmetic, transcendental;
inverse; anything really ...); that you get back the *same*
object (ie. it passes transparently through any operation), and
not raise any exception if you so choose.
missing_val == atan(missing_val) - missing_val;
missing_val == 1 / missing_val;
missing_val == missing_val + missing_val;
missing_val == missing_val - missing_val;
typedef std::vector<any_type> dVec;
... populate some_vector ...
dVec::iterator = some_vector.find(missing_val);
Boosters, do we have such a representation; is there value in having
such a thing in Boost; is there a (simple) alternative work-around ??
All ideas and comments appreciated.
-- Manfred MetOcean Engineers