On 28 January 2010 01:31, Patrick Horgan <phorgan1@xxxxxxxxx> wrote: > In a templated class we define our difference type like this: > > typedef typeof(T() - T()) differenceType; > That works? Wouldn't it give unsigned when T is unsigned? > How simple, how elegant, but typeof is not part of the C++ standard, and > isn't available when we use -std=c++0x. Other than using specializations > for each type that we might use with this class, is there some other > equivalently simple way to do this? > I assume that decltype can do it. http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2115.pdf ~ Scott
