public DiagBox(int rank, int size, T diagElem)
{
Contract.Requires <ArgumentOutOfRangeException>(rank >= 0, "rank is negative");
Contract.Requires <ArgumentOutOfRangeException>(size >= 0, "size is negative");
_rank = rank;
_size = size;
_diagElem = diagElem;
_zeroElem = TypeTraits.GetInstanceTraits(diagElem).GetZero();
}
public static Matrix <T> Diag <T>(int size, T element)
{
T zero = default(T);
var traits = TypeTraits.GetInstanceTraits <T>(element);
if (traits != null)
{
zero = traits.GetZero();
}
return(new DiagMatrix <T>(size, element, zero));
}
private ITypeInstanceTraits <T> TryGetElementTraits()
{
if (IsEmpty)
{
return(null);
}
var element = _matrix[0, 0];
return(TypeTraits.GetInstanceTraits(element));
}
private ITypeInstanceTraits <T> TryGetInstanceTraits()
{
if (_box.Sizes.All(s => s > 0))
{
int[] indices = new int[_box.Rank];
return(TypeTraits.GetInstanceTraits(_box.ElementAt(indices)));
}
else
{
return(null);
}
}
public Vector <T> GetZero()
{
if (IsEmpty)
{
return(Vector.Zero <T>(_vector.Size));
}
else
{
var traits = TypeTraits.GetInstanceTraits(_vector[0]);
if (traits == null)
{
return(Vector.Zero <T>(_vector.Size));
}
else
{
return(Vector.Zero(_vector.Size, traits));
}
}
}