public static Costs operator +(Costs sum, Cost c)
{
Mana m = c as Mana;
if (m != null)
{
for (int i = 0; i < sum.CostList.Count; i++)
{
Mana mm = sum.CostList[i] as Mana;
if (mm == null)
{
continue;
}
if (mm.IsSameType(m))
{
sum.CostList[i] += m;
return(sum);
}
}
}
sum.CostList.Add(c);
return(sum);
}
public static Cost operator -(Cost c1, Cost c2)
{
Mana m = c1 as Mana;
Mana n = c2 as Mana;
Costs cst1 = c1 as Costs;
if (cst1 != null)
{
for (int i = 0; i < cst1.CostList.Count; i++)
{
Mana cst1m = cst1.CostList[i] as Mana;
if (cst1m != null)
{
if (cst1m.IsSameType(n))
{
cst1m.count -= n.count;
return(cst1);
}
}
}
}
if (!(m == null || n == null))
{
if (m.IsSameType(n))
{
m.count += n.count;
return(m);
}
}
if (c1 == null)
{
if (c2 == null)
{
return(null);
}
else
{
return(c2);
}
}
else if (c2 == null)
{
return(c1);
}
Costs sum = new Costs();
sum += c1;
sum += c2;
return(sum);
}
