private static RequireIntEnumsAndBitSet <TEnum, TFlag> CreateDefault()
{
RequireIntEnumsAndBitSet <TEnum, TFlag> result = new RequireIntEnumsAndBitSet <TEnum, TFlag>();
result.BitSet = (BitSetAttribute)typeof(TFlag).GetCustomAttributes(typeof(BitSetAttribute), false).SingleOrDefault();
result.IsValid = typeof(TEnum).IsEnum && //Marshal.SizeOf(Enum.GetUnderlyingType(typeof(TEnum))) <= sizeof(int) && // check needed?
result.BitSet != null && result.BitSet.SetEnumType == typeof(TEnum);
return(result);
}
public static bool InSet <TEnum, TFlag>(this TEnum bit, TFlag set, RequireIntEnumsAndBitSet <TEnum, TFlag> tag = default(RequireIntEnumsAndBitSet <TEnum, TFlag>))
where TEnum : struct, IConvertible, IComparable
where TFlag : struct, IConvertible
{
if (!RequireIntEnumsAndBitSet <TEnum, TFlag> .Default.IsValid)
{
throw new NotSupportedException();
}
if (!RequireIntEnumsAndBitSet <TEnum, TFlag> .Default.BitSet.IsInrange(bit))
{
throw new ArgumentOutOfRangeException("bit");
}
ulong bitvalue = 1UL << bit.ToInt32(null);
ulong flagsset = set.ToUInt64(null);
return((flagsset & bitvalue) != 0UL);
}