public AnalysisSetTwoUnion(AnalysisProxy value1, AnalysisProxy value2, UnionComparer comparer)
{
Debug.Assert(!comparer.Equals(value1, value2));
Value1 = value1;
Value2 = value2;
_comparer = comparer;
}
public AnalysisSetTwoUnion(IEnumerable <AnalysisProxy> set, UnionComparer comparer)
{
_comparer = comparer;
var tup = FromEnumerable(set, comparer);
if (tup == null || tup.Item2 == null)
{
throw new InvalidOperationException("Sequence requires exactly two values");
}
Value1 = tup.Item1;
Value2 = tup.Item2;
}
internal static Tuple <AnalysisProxy, AnalysisProxy> FromEnumerable(IEnumerable <AnalysisProxy> set, UnionComparer comparer)
{
using (var e = set.GetEnumerator()) {
if (!e.MoveNext())
{
return(new Tuple <AnalysisProxy, AnalysisProxy>(null, null));
}
var value1 = e.Current;
if (!e.MoveNext())
{
return(new Tuple <AnalysisProxy, AnalysisProxy>(value1, null));
}
var value2 = e.Current;
if (comparer.Equals(e.Current, value1))
{
bool dummy;
return(new Tuple <AnalysisProxy, AnalysisProxy>(comparer.MergeTypes(value1, value2, out dummy), null));
}
if (e.MoveNext())
{
return(null);
}
return(new Tuple <AnalysisProxy, AnalysisProxy>(value1, value2));
}
}
public AnalysisSetOneUnion(AnalysisProxy value, UnionComparer comparer)
{
Value = value;
_comparer = comparer;
}
public AnalysisSetEmptyUnion(UnionComparer comparer)
{
_comparer = comparer;
}
