| private ReferenceEquals ( Object objA, Object objB ) : bool | ||
| objA | Object | |
| objB | Object | |
| return | bool | |
public void TestObjectReferenceEquals()
{
Assert.That(Object.ReferenceEquals(null, null), Is.True);
var suffix = "_";
var o1 = "TestString" + suffix;
var o2 = "TestString" + suffix;
var o3 = o1;
Assert.That(Object.ReferenceEquals(null, o1), Is.False);
Assert.That(Object.ReferenceEquals(o1, o2), Is.False);
Assert.That(Object.ReferenceEquals(o1, o3), Is.True);
// Object.ReferenceEquals(valueType1, valueType2) always returns false
int age = 34;
Assert.That(Object.ReferenceEquals(age, age), Is.False);
// When comparing strings, the interned string is compared if the string is interned.
var s1 = "TestString";
var s2 = "TestString";
Assert.That(String.IsInterned(s1), Is.Not.Null);
Assert.That(String.IsInterned(s2), Is.Not.Null);
Assert.That(Object.ReferenceEquals(s1, s2), Is.True);
}
public static bool operator ==(DataType x, DataType y)
{
if (Object.ReferenceEquals(x, null) && Object.ReferenceEquals(y, null))
{
return(true);
}
if (Object.ReferenceEquals(x, null) || Object.ReferenceEquals(y, null))
{
return(false);
}
return(x.Name.ToUpper() == y.Name.ToUpper());
}
public static void Copy(Array sourceArray, int sourceIndex, Array destinationArray, int destinationIndex, int length)
{
if (sourceArray == null)
{
throw new ArgumentNullException("sourceArray");
}
if (destinationArray == null)
{
throw new ArgumentNullException("destinationArray");
}
if (length < 0)
{
throw new ArgumentOutOfRangeException("length", "Value has to be >= 0.");
}
if (sourceArray.Rank != destinationArray.Rank)
{
throw new RankException(SR.Rank_MultiDimNotSupported);
}
if (sourceIndex < 0)
{
throw new ArgumentOutOfRangeException("sourceIndex", "Value has to be >= 0.");
}
if (destinationIndex < 0)
{
throw new ArgumentOutOfRangeException("destinationIndex", "Value has to be >= 0.");
}
if (FastCopy(sourceArray, sourceIndex, destinationArray, destinationIndex, length))
{
return;
}
int source_pos = sourceIndex - sourceArray.GetLowerBound(0);
int dest_pos = destinationIndex - destinationArray.GetLowerBound(0);
if (dest_pos < 0)
{
throw new ArgumentOutOfRangeException("destinationIndex", "Index was less than the array's lower bound in the first dimension.");
}
// re-ordered to avoid possible integer overflow
if (source_pos > sourceArray.Length - length)
{
throw new ArgumentException("length");
}
if (dest_pos > destinationArray.Length - length)
{
throw new ArgumentException("Destination array was not long enough. Check destIndex and length, and the array's lower bounds", nameof(destinationArray));
}
Type src_type = sourceArray.GetType().GetElementType();
Type dst_type = destinationArray.GetType().GetElementType();
var dst_type_vt = dst_type.IsValueType;
if (!Object.ReferenceEquals(sourceArray, destinationArray) || source_pos > dest_pos)
{
for (int i = 0; i < length; i++)
{
Object srcval = sourceArray.GetValueImpl(source_pos + i);
if (srcval == null && dst_type_vt)
{
throw new InvalidCastException();
}
try {
destinationArray.SetValueImpl(srcval, dest_pos + i);
} catch (ArgumentException) {
throw CreateArrayTypeMismatchException();
} catch (InvalidCastException) {
if (CanAssignArrayElement(src_type, dst_type))
{
throw;
}
throw CreateArrayTypeMismatchException();
}
}
}
else
{
for (int i = length - 1; i >= 0; i--)
{
Object srcval = sourceArray.GetValueImpl(source_pos + i);
try {
destinationArray.SetValueImpl(srcval, dest_pos + i);
} catch (ArgumentException) {
throw CreateArrayTypeMismatchException();
} catch {
if (CanAssignArrayElement(src_type, dst_type))
{
throw;
}
throw CreateArrayTypeMismatchException();
}
}
}
}
private static void Copy(Array sourceArray, int sourceIndex, Array destinationArray, int destinationIndex, int length, bool reliable)
{
if (sourceArray == null)
{
throw new ArgumentNullException(nameof(sourceArray));
}
if (destinationArray == null)
{
throw new ArgumentNullException(nameof(destinationArray));
}
if (length < 0)
{
throw new ArgumentOutOfRangeException(nameof(length), "Value has to be >= 0.");
}
if (sourceArray.Rank != destinationArray.Rank)
{
throw new RankException(SR.Rank_MultiDimNotSupported);
}
if (sourceIndex < 0)
{
throw new ArgumentOutOfRangeException(nameof(sourceIndex), "Value has to be >= 0.");
}
if (destinationIndex < 0)
{
throw new ArgumentOutOfRangeException(nameof(destinationIndex), "Value has to be >= 0.");
}
if (FastCopy(sourceArray, sourceIndex, destinationArray, destinationIndex, length))
{
return;
}
int source_pos = sourceIndex - sourceArray.GetLowerBound(0);
int dest_pos = destinationIndex - destinationArray.GetLowerBound(0);
if (source_pos < 0)
{
throw new ArgumentOutOfRangeException(nameof(sourceIndex), "Index was less than the array's lower bound in the first dimension.");
}
if (dest_pos < 0)
{
throw new ArgumentOutOfRangeException(nameof(destinationIndex), "Index was less than the array's lower bound in the first dimension.");
}
// re-ordered to avoid possible integer overflow
if (source_pos > sourceArray.Length - length)
{
throw new ArgumentException(SR.Arg_LongerThanSrcArray, nameof(sourceArray));
}
if (dest_pos > destinationArray.Length - length)
{
throw new ArgumentException("Destination array was not long enough. Check destIndex and length, and the array's lower bounds", nameof(destinationArray));
}
Type src_type = sourceArray.GetType().GetElementType() !;
Type dst_type = destinationArray.GetType().GetElementType() !;
var dst_type_vt = dst_type.IsValueType && Nullable.GetUnderlyingType(dst_type) == null;
bool src_is_enum = src_type.IsEnum;
bool dst_is_enum = dst_type.IsEnum;
if (src_is_enum)
{
src_type = Enum.GetUnderlyingType(src_type);
}
if (dst_is_enum)
{
dst_type = Enum.GetUnderlyingType(dst_type);
}
if (reliable)
{
if (!dst_type.Equals(src_type) &&
!(dst_type.IsPrimitive && src_type.IsPrimitive && CanChangePrimitive(dst_type, src_type, true)))
{
throw new ArrayTypeMismatchException(SR.ArrayTypeMismatch_CantAssignType);
}
}
else
{
if (!CanAssignArrayElement(src_type, dst_type))
{
throw new ArrayTypeMismatchException(SR.ArrayTypeMismatch_CantAssignType);
}
}
if (!Object.ReferenceEquals(sourceArray, destinationArray) || source_pos > dest_pos)
{
for (int i = 0; i < length; i++)
{
Object srcval = sourceArray.GetValueImpl(source_pos + i);
if (!src_type.IsValueType && dst_is_enum)
{
throw new InvalidCastException(SR.InvalidCast_DownCastArrayElement);
}
if (dst_type_vt && (srcval == null || (src_type == typeof(object) && srcval.GetType() != dst_type)))
{
throw new InvalidCastException();
}
try {
destinationArray.SetValueRelaxedImpl(srcval, dest_pos + i);
} catch (ArgumentException) {
throw CreateArrayTypeMismatchException();
}
}
}
else
{
for (int i = length - 1; i >= 0; i--)
{
Object srcval = sourceArray.GetValueImpl(source_pos + i);
try {
destinationArray.SetValueRelaxedImpl(srcval, dest_pos + i);
} catch (ArgumentException) {
throw CreateArrayTypeMismatchException();
}
}
}
}