public ControlFlowElementData this[CanBeNull] IControlFlowElement element]
{
set
{
if (element != null)
this[element.Id] = value;
}
get { return element != null ? this[element.Id] : null; }
}
public bool Equals(CanBeNull <T> that)
{
if (that.hasValue != this.hasValue)
{
return(false);
}
if (!hasValue)
{
return(true);
}
return(val.Equals(that.val));
}
public static void Main()
{
CanBeNull <int> nint1 = CanBeNull <int> .NULL;
CanBeNull <int> nint2 = new CanBeNull <int>(3);
CanBeNull <int> nint3 = new CanBeNull <int>(5);
Console.WriteLine("nint1: {0}", nint1);
Console.WriteLine("nint2: {0}", nint2);
Console.WriteLine("nint3: {0}", nint3);
Console.WriteLine("nint1: {0}", nint1.GetValueOrDefault(-1));
Console.WriteLine(nint1.Equals(null));
Console.WriteLine(nint2.Equals(new CanBeNull <int>(3)));
Console.WriteLine();
Nullable <int> nnint1 = null;
Nullable <int> nnint2 = new Nullable <int>(3);
Nullable <int> nnint3 = new Nullable <int>(5);
Console.WriteLine("nint1: {0}", nnint1);
Console.WriteLine("nint2: {0}", nnint2);
Console.WriteLine("nint3: {0}", nnint3);
Console.WriteLine("nint1: {0}", nnint1.GetValueOrDefault(-1));
Console.WriteLine(nnint1.Equals(null));
Console.WriteLine(nnint2.Equals(new Nullable <int>(3)));
Console.WriteLine();
int?nnnint1 = null;
int?nnnint2 = 3;
int?nnnint3 = 5;
Console.WriteLine("nint1: {0}", nnnint1);
Console.WriteLine("nint2: {0}", nnnint2);
Console.WriteLine("nint3: {0}", nnnint3);
Console.WriteLine("nint1: {0}", nnnint1 ?? -1);
Console.WriteLine(nnint1.Equals(null));
Console.WriteLine(nnint2.Equals(new Nullable <int>(3)));
}
public void WorksWithReferenceTypes()
{
var x = new CanBeNull<string>("hello");
}
public void AssignsNullValueCorrectly()
{
const string input = "hello";
var x = new CanBeNull<string>(input);
Assert.That(x.Value, Is.SameAs(input));
}
public void AssignsNonNullValueCorrectly()
{
const string input = null;
var x = new CanBeNull<string>(input);
Assert.That(x.Value, Is.Null);
}
public NullabilityAttributeMetadataNames GetMetadataNames()
{
return(new NullabilityAttributeMetadataNames(NotNull.GetFullMetadataName(), CanBeNull.GetFullMetadataName(),
ItemNotNull.GetFullMetadataName(), ItemCanBeNull.GetFullMetadataName()));
}
