System.Text.RegularExpressions.RegexCode.OpcodeSize C# (CSharp) Method

        internal static int OpcodeSize(int opcode)
        {
            opcode &= Mask;

            switch (opcode)
            {
                case Nothing:
                case Bol:
                case Eol:
                case Boundary:
                case Nonboundary:
                case ECMABoundary:
                case NonECMABoundary:
                case Beginning:
                case Start:
                case EndZ:
                case End:
                case Nullmark:
                case Setmark:
                case Getmark:
                case Setjump:
                case Backjump:
                case Forejump:
                case Stop:
                    return 1;

                case One:
                case Notone:
                case Multi:
                case Ref:
                case Testref:
                case Goto:
                case Nullcount:
                case Setcount:
                case Lazybranch:
                case Branchmark:
                case Lazybranchmark:
                case Prune:
                case Set:
                    return 2;

                case Capturemark:
                case Branchcount:
                case Lazybranchcount:
                case Onerep:
                case Notonerep:
                case Oneloop:
                case Notoneloop:
                case Onelazy:
                case Notonelazy:
                case Setlazy:
                case Setrep:
                case Setloop:
                    return 3;

                default:
                    throw new ArgumentException(SR.Format(SR.UnexpectedOpcode, opcode.ToString(CultureInfo.CurrentCulture)));
            }
        }