internal static void ValidateFlagEnumType(Type value)
{
if (value == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("EnumType");
}
bool hasFlags = value.GetCustomAttributes(typeof(FlagsAttribute), true).Length > 0;
if (!value.IsEnum || !hasFlags)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument("EnumType", SR.GetString(SR.FlagEnumTypeExpected, value));
}
int[] values = (int[])Enum.GetValues(value);
if (values != null &&
values.Length > 0)
{
for (int i = 0; i < values.Length; i++)
{
if (values[i] != 0 && !IsPowerOfTwo(values[i]))
{
if (!StandardRuntimeFlagEnumValidatorAttribute.IsCombinedValue(values[i], values, i - 1))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument("EnumType", SR.GetString(SR.InvalidFlagEnumType));
}
}
}
}
}
public override void Validate(object value)
{
if (!Enum.IsDefined(typeof(TEnum), value))
{
TEnum dummy;
if (!Enum.TryParse <TEnum>(value.ToString(), true, out dummy))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidEnumArgumentException("value", (int)value, typeof(TEnum)));
}
int combinedValue = (int)((object)dummy);
int[] values = (int[])Enum.GetValues(typeof(TEnum));
if (!StandardRuntimeFlagEnumValidatorAttribute.IsCombinedValue(combinedValue, values, values.Length - 1))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidEnumArgumentException("value", (int)value, typeof(TEnum)));
}
}
}
public StandardRuntimeFlagEnumValidator()
{
StandardRuntimeFlagEnumValidatorAttribute.ValidateFlagEnumType(typeof(TEnum));
}
public StandardRuntimeFlagEnumValidatorAttribute(Type enumType)
{
StandardRuntimeFlagEnumValidatorAttribute.ValidateFlagEnumType(enumType);
this.EnumType = enumType;
}
