public LatticeQueryable(Lattice /*!*/ lattice, Lattice.Element /*!*/ element)
{
Contract.Requires(element != null);
Contract.Requires(lattice != null);
this.lattice = lattice;
this.element = element;
// base();
}
private Element /*!*/ Combine(Element /*!*/ first, ICombineNameMap /*?*/ firstToResult, Element /*!*/ second, ICombineNameMap /*?*/ secondToResult, CombineOp c)
{
Contract.Requires(second != null);
Contract.Requires(first != null);
Contract.Ensures(Contract.Result <Element>() != null);
Elt a = (Elt)first;
Elt b = (Elt)second;
int unionCount = System.Math.Max(a.Count, b.Count);
Elt combined = new Elt(unionCount, IsBottom(a) && IsBottom(b));
for (int i = 0; i < unionCount; i++)
{
bool thisExists = a.Contains(i);
bool thatExists = b.Contains(i);
if (thisExists && thatExists)
{
Lattice.Element suba = a[i];
Lattice.Element subb = b[i];
Contract.Assert(suba != null && subb != null);
switch (c)
{
case CombineOp.Meet:
combined[i] = SubLattice(i).Meet(suba, subb);
break;
case CombineOp.Join:
if (firstToResult != null && secondToResult != null)
{
combined[i] = SubLattice(i).Join(suba, firstToResult, subb, secondToResult);
}
else
{
combined[i] = SubLattice(i).Join(suba, subb);
}
break;
case CombineOp.Widen:
if (firstToResult != null && secondToResult != null)
{
combined[i] = SubLattice(i).Widen(suba, firstToResult, subb, secondToResult);
}
else
{
combined[i] = SubLattice(i).Widen(suba, subb);
}
break;
}
}
else if (thisExists)
{
combined[i] = a[i];
}
else
{
combined[i] = b[i];
}
}
Debug.Assert(combined.IsValid);
return(combined);
}
public LatticeQueryable(Lattice/*!*/ lattice, Lattice.Element/*!*/ element) {
Contract.Requires(element != null);
Contract.Requires(lattice != null);
this.lattice = lattice;
this.element = element;
// base();
}
