private static bool IsExplicitNumericConversion()

in System.Workflow.Activities/Rules/RuleValidation.cs [1622:1875]
229 lines of code
159 McCabe index (conditional complexity)

        private static bool IsExplicitNumericConversion(Type sourceType, Type testType)
        {
            // includes the implicit conversions as well

            // unwrap nullables
            TypeCode sourceTypeCode = (ConditionHelper.IsNullableValueType(sourceType))
                ? Type.GetTypeCode(sourceType.GetGenericArguments()[0])
                : Type.GetTypeCode(sourceType);
            TypeCode testTypeCode = (ConditionHelper.IsNullableValueType(testType))
                ? Type.GetTypeCode(testType.GetGenericArguments()[0])
                : Type.GetTypeCode(testType);

            switch (sourceTypeCode)
            {
                case TypeCode.SByte:
                    switch (testTypeCode)
                    {
                        case TypeCode.SByte:
                        case TypeCode.Byte:
                        case TypeCode.UInt16:
                        case TypeCode.UInt32:
                        case TypeCode.UInt64:
                        case TypeCode.Char:

                        case TypeCode.Int16:
                        case TypeCode.Int32:
                        case TypeCode.Int64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;

                case TypeCode.Byte:
                    switch (testTypeCode)
                    {
                        case TypeCode.Byte:
                        case TypeCode.SByte:
                        case TypeCode.Char:

                        case TypeCode.Int16:
                        case TypeCode.UInt16:
                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;

                case TypeCode.Int16:
                    switch (testTypeCode)
                    {
                        case TypeCode.SByte:
                        case TypeCode.Byte:
                        case TypeCode.UInt16:
                        case TypeCode.UInt32:
                        case TypeCode.UInt64:
                        case TypeCode.Char:

                        case TypeCode.Int16:
                        case TypeCode.Int32:
                        case TypeCode.Int64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;

                case TypeCode.UInt16:
                    switch (testTypeCode)
                    {
                        case TypeCode.SByte:
                        case TypeCode.Byte:
                        case TypeCode.Int16:
                        case TypeCode.UInt16:
                        case TypeCode.Char:

                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;

                case TypeCode.Int32:
                    switch (testTypeCode)
                    {
                        case TypeCode.SByte:
                        case TypeCode.Byte:
                        case TypeCode.Int16:
                        case TypeCode.UInt16:
                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.UInt64:
                        case TypeCode.Char:

                        case TypeCode.Int64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;

                case TypeCode.UInt32:
                    switch (testTypeCode)
                    {
                        case TypeCode.SByte:
                        case TypeCode.Byte:
                        case TypeCode.Int16:
                        case TypeCode.UInt16:
                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.Char:

                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;

                case TypeCode.Int64:
                    switch (testTypeCode)
                    {
                        case TypeCode.SByte:
                        case TypeCode.Byte:
                        case TypeCode.Int16:
                        case TypeCode.UInt16:
                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Char:

                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;

                case TypeCode.UInt64:
                    switch (testTypeCode)
                    {
                        case TypeCode.SByte:
                        case TypeCode.Byte:
                        case TypeCode.Int16:
                        case TypeCode.UInt16:
                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Char:

                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;

                case TypeCode.Char:
                    switch (testTypeCode)
                    {
                        case TypeCode.Char:
                        case TypeCode.SByte:
                        case TypeCode.Byte:
                        case TypeCode.Int16:

                        case TypeCode.UInt16:
                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;

                case TypeCode.Single:
                    switch (testTypeCode)
                    {
                        case TypeCode.SByte:
                        case TypeCode.Byte:
                        case TypeCode.Int16:
                        case TypeCode.UInt16:
                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Char:
                        case TypeCode.Single:
                        case TypeCode.Decimal:

                        case TypeCode.Double:
                            return true;
                    }
                    return false;

                case TypeCode.Double:
                    switch (testTypeCode)
                    {
                        case TypeCode.SByte:
                        case TypeCode.Byte:
                        case TypeCode.Int16:
                        case TypeCode.UInt16:
                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Char:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;

                case TypeCode.Decimal:
                    switch (testTypeCode)
                    {
                        case TypeCode.SByte:
                        case TypeCode.Byte:
                        case TypeCode.Int16:
                        case TypeCode.UInt16:
                        case TypeCode.Int32:
                        case TypeCode.UInt32:
                        case TypeCode.Int64:
                        case TypeCode.UInt64:
                        case TypeCode.Char:
                        case TypeCode.Single:
                        case TypeCode.Double:
                        case TypeCode.Decimal:
                            return true;
                    }
                    return false;
            }
            return false;
        }