public VectorDomain <T> Lub(VectorDomain <T> other)
{
if (Elements.Count != other.Elements.Count)
{
return(null);
}
var res = new Seq <T>(Elements.Count);
for (var i = 0; i < Elements.Count; i++)
{
res.Add(Elements[i].Lub(other.Elements[i]));
}
return(new VectorDomain <T>(res));
}
public bool CommutableWith(VectorDomain <T> other)
{
if (Elements.Count != other.Elements.Count)
{
throw new InvalidOperationException("incompatible domains");
}
for (var i = 0; i < Elements.Count; i++)
{
if (!Elements[i].CommutableWith(other.Elements[i]))
{
return(false);
}
}
return(true);
}
public bool Lte(VectorDomain <T> other)
{
if (Elements.Count != other.Elements.Count)
{
throw new InvalidOperationException("comparing vectors of unequal length");
}
for (var i = 0; i < Elements.Count; i++)
{
if (!Elements[i].Lte(other.Elements[i]))
{
return(false);
}
}
return(true);
}
public VectorDomain <T> Lub(VectorDomain <T> other, BoolRef changed)
{
if (Elements.Count != other.Elements.Count)
{
return(null);
}
var res = default(Seq <T>);
for (var i = 0; i < Elements.Count; i++)
{
var thisChanged = new BoolRef();
var elem = Elements[i].Lub(other.Elements[i], thisChanged);
if (elem == null)
{
return(null);
}
if (thisChanged.Value && res == null)
{
changed.Set();
res = new Seq <T>(Elements.Count);
for (var j = 0; j < i; j++)
{
res.Add(Elements[i]);
}
}
if (res != null)
{
res[i] = elem;
}
}
if (res == null)
{
return(this);
}
else
{
return(new VectorDomain <T>(res));
}
}