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Blitz Support : |
From: Dawson, Paul (UK Filton) (paul.dawson3_at_[hidden])
Date: 2005-03-09 08:47:05
Sorry if this question has come up before, but I've had a long search of the archive, and I can't seem to answer it.
I have a templated class Point<S> which inherits from TinyVector<S,3>.
When I do something like:
Point<S> myFunction() {
Point<S> p1;
Point<S> p2;
..
..
return p1 - p2;
}
I get an error to the effect that the result of p1 - p2 is not of type Point, but a blitz vector expression.
I can avoid this error by casting the return to a Point i.e. "return static_cast<Point>(p1 -p2);", but it seems to me that I might be losing the efficiency that comes from using vector expressions, and also making the code harder to understand.
If I do the same thing using tinyvectors explicitly, I don't have the same problem. I don't understand why my derived Point class does not have the same behaviour.
Many thanks, Paul.
---------------------------
Paul Dawson
paul.dawson3_at_[hidden]
0117 302 8311
---------------------------
Paul Dawson
paul.dawson3_at_[hidden]
0117 302 8311
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