Is there a generic way to to initialize to zero an object representing a point in a linear space? I know the base types can be constructed like int foo(0); or double bar(0); but but if I have a three-vector class, I don't want to give it Vector::Vector(double); because Vector(2) makes no sense. (Should Vector(2) make the Vector (2, 0, 0) or the Vector (2, 2, 2)?) I also would rather have Vector() create three uninitialized doubles rather than default-constructing (0,0,0). I know SGI's extension of MonoidOperation concept has an identity_element function to go with it (see http://www.sgi.com/tech/stl/MonoidOperation.html), but that's not widely supported. So, what's the best way to initialize a generic point in a linear space to zero before, e.g., adding up a bunch of points? —Ben