public sealed override Array GetEnumValues()
{
if (!IsEnum)
{
throw new ArgumentException(SR.Arg_MustBeEnum, "enumType");
}
Array values = Enum.GetEnumInfo(this).ValuesAsUnderlyingType;
int count = values.Length;
// Without universal shared generics, chances are slim that we'll have the appropriate
// array type available. Offer an escape hatch that avoids a MissingMetadataException
// at the cost of a small appcompat risk.
Array result;
if (AppContext.TryGetSwitch("Switch.System.Enum.RelaxedGetValues", out bool isRelaxed) && isRelaxed)
{
result = Array.CreateInstance(Enum.InternalGetUnderlyingType(this), count);
}
else
{
result = Array.CreateInstance(this, count);
}
Array.Copy(values, result, values.Length);
return(result);
}
public sealed override bool IsEnumDefined(object value)
{
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
if (!IsEnum)
{
throw new ArgumentException(SR.Arg_MustBeEnum);
}
if (value is string valueAsString)
{
EnumInfo enumInfo = Enum.GetEnumInfo(this);
foreach (string name in enumInfo.Names)
{
if (valueAsString == name)
{
return(true);
}
}
return(false);
}
else
{
ulong rawValue;
if (!Enum.TryGetUnboxedValueOfEnumOrInteger(value, out rawValue))
{
if (Type.IsIntegerType(value.GetType()))
{
throw new ArgumentException(SR.Format(SR.Arg_EnumUnderlyingTypeAndObjectMustBeSameType, value.GetType(), Enum.InternalGetUnderlyingType(this)));
}
else
{
throw new InvalidOperationException(SR.InvalidOperation_UnknownEnumType);
}
}
if (value is Enum)
{
if (!Enum.ValueTypeMatchesEnumType(this, value))
{
throw new ArgumentException(SR.Format(SR.Arg_EnumAndObjectMustBeSameType, value.GetType(), this));
}
}
else
{
Type underlyingType = Enum.InternalGetUnderlyingType(this);
if (!(underlyingType.TypeHandle.ToEETypePtr() == value.EETypePtr))
{
throw new ArgumentException(SR.Format(SR.Arg_EnumUnderlyingTypeAndObjectMustBeSameType, value.GetType(), underlyingType));
}
}
return(Enum.GetEnumName(this, rawValue) != null);
}
}
public sealed override Array GetEnumValuesAsUnderlyingType()
{
if (!IsActualEnum)
{
throw new ArgumentException(SR.Arg_MustBeEnum, "enumType");
}
return((Array)Enum.GetEnumInfo(this).ValuesAsUnderlyingType.Clone());
}
