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From: Yitzhak Sapir (yitzhaks_at_[hidden])
Date: 2002-12-18 09:01:59

I would like to detect overflow in a function, before I multiply a
variable X of integral type X_type by 2.

I could write:

        if (X > std::numeric_limits<X_type>::max() / 2)

but this causes an extra dependency on X's type.

I had considered writing an helper function to work as a typeof

template <class T>
T numeric_limits_max(T) { return std::numeric_limits<T>::max(); }

and then I could write:

        if (X > numeric_limits_max(X) / 2) ...

Something similar could be done for min(), of course. I was wondering if
such functions would be useful as part of the boost facilities in

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