Need a std::numeric_limits::lowest() equivalent

[Xavier Bigand via Digitalmars-d]

Hi,

I am creating an AABB struct that should be initialized in an invalid 
state. Here is my actual code :

struct AABB(type, int dimensions)
{
        static assert(dimensions == 2 || dimensions == 3);

        VectorType      min = Vector!(type, 3)(type.max, type.max, type.max);
        VectorType      max = Vector!(type, 3)(-type.max, -type.max, -type.max);

        bool    isValid() const
        {
                return max >= min;
        }

        private alias VectorType = Vector!(type, dimensions);

        unittest
        {
                AABB2i  aabbInt;
                AABB2f  aabbFloat;

                assert(aabbInt.isValid == false);
                assert(aabbFloat.isValid == false);
        }
}

Using -type.max is close to what I want but for integer int.min is 
different than -int.max.

In c++11 there is std::numeric_limits<T>::lowest() that works perfectly.

Can an equivalent property added to integer and floating types?

PS: I prefer to use border values to be sure that the AABB stay invalid 
with a partial initialization, else using -1 and 1 give the same result ;-)