57internal Flags _flags; 142_flags |= Flags.Debug_LeftConstructor; 148Debug.Assert((_flags & Flags.Debug_LeftConstructor) == 0); 200private void InterlockedSetFlags(Flags flags) 207Debug.Assert(sizeof(Flags) == sizeof(ulong)); 208Interlocked.Or(ref Unsafe.As<Flags, ulong>(ref _flags), (ulong)flags); 223get { return (_flags & Flags.ImplicitFile) != 0; } 228get { return (_flags & (Flags.UncPath | Flags.DosPath)) != 0; } 233get { return (_flags & Flags.DosPath) != 0; } 238get { return (_flags & Flags.UncPath) != 0; } 243get { return (_flags & Flags.UnixPath) != 0; } 246private Flags HostType 248get { return _flags & Flags.HostTypeMask; } 274internal bool DisablePathAndQueryCanonicalization => (_flags & Flags.DisablePathAndQueryCanonicalization) != 0; 280return (_flags & Flags.UserDrivenParsing) != 0; 299private bool NotAny(Flags flags) 304private bool InFact(Flags flags) 309private static bool StaticNotAny(Flags allFlags, Flags checkFlags) 314private static bool StaticInFact(Flags allFlags, Flags checkFlags) 322Flags cF = _flags; 323if ((cF & Flags.MinimalUriInfoSet) == 0) 327Debug.Assert(_info != null && (_flags & Flags.MinimalUriInfoSet) != 0); 333if ((_flags & Flags.AllUriInfoSet) == 0) 346if (allowDnsOptimization && InFact(Flags.CanonicalDnsHost)) 529_flags = Flags.Zero; 555dontEscape = InFact(Flags.UserEscaped); 575_flags = Flags.Zero; 793case Flags.DnsHostType: return UriHostNameType.Dns; 794case Flags.IPv4HostType: return UriHostNameType.IPv4; 795case Flags.IPv6HostType: return UriHostNameType.IPv6; 796case Flags.BasicHostType: return UriHostNameType.Basic; 797case Flags.UncHostType: return UriHostNameType.Basic; 798case Flags.UnknownHostType: return UriHostNameType.Unknown; 822return NotAny(Flags.NotDefaultPort); 850return InFact(Flags.LoopbackHost); 970if (NotAny(Flags.HostNotCanonical | Flags.PathNotCanonical | Flags.ShouldBeCompressed)) 1024UnescapeMode mode = (InFact(Flags.PathNotCanonical) && !IsImplicitFile) 1033if (InFact(Flags.ShouldBeCompressed)) 1073if (InFact(Flags.NotDefaultPort)) 1152Flags hostType = HostType; 1153if (hostType == Flags.IPv6HostType || (hostType == Flags.BasicHostType && InFact(Flags.HostNotCanonical | Flags.E_HostNotCanonical))) 1180Flags hostType = HostType; 1181if (hostType == Flags.DnsHostType) 1185else if (hostType == Flags.IPv6HostType) 1194else if (hostType == Flags.BasicHostType && InFact(Flags.HostNotCanonical | Flags.E_HostNotCanonical)) 1232return InFact(Flags.UserEscaped); 1350if (NotAny(Flags.AuthorityFound) || IsDosPath) 1614ushort nonCanonical = (ushort)((ushort)_flags & (ushort)Flags.CannotDisplayCanonical); 1615if (((_flags & (Flags.ShouldBeCompressed | Flags.FirstSlashAbsent | Flags.BackslashInPath)) != 0) || 1618nonCanonical |= (ushort)Flags.PathNotCanonical; 1744if (NotAny(Flags.AllUriInfoSet) || other.NotAny(Flags.AllUriInfoSet)) 1762if (InFact(Flags.CanonicalDnsHost) && other.InFact(Flags.CanonicalDnsHost)) 1906private static unsafe ParsingError ParseScheme(string uriString, ref Flags flags, ref UriParser? syntax) 1908Debug.Assert((flags & Flags.Debug_LeftConstructor) == 0); 1921flags |= (Flags)6; 1926flags |= (Flags)5; 1938flags |= (Flags)idx; 1952Debug.Assert((_flags & Flags.CustomParser_ParseMinimalAlreadyCalled) != 0); 1960_flags |= Flags.ErrorOrParsingRecursion; 1981int idx = (int)(_flags & Flags.IndexMask); 1985_flags &= ~(Flags.IndexMask | Flags.UserDrivenParsing); 2003if (!OperatingSystem.IsWindows() && InFact(Flags.UnixPath)) 2005_flags |= Flags.BasicHostType; 2006_flags |= (Flags)idx; 2017&& NotAny(Flags.ImplicitFile) && (idx + 1 < length)) 2035_flags |= Flags.AuthorityFound; 2050_flags |= Flags.DosPath; 2055_flags |= Flags.AuthorityFound; 2074_flags |= Flags.UncPath; 2080_flags |= Flags.UnixPath | Flags.AuthorityFound; 2088if ((_flags & (Flags.UncPath | Flags.DosPath | Flags.UnixPath)) != 0) 2101_flags |= Flags.AuthorityFound; 2109else if (_syntax.InFact(UriSyntaxFlags.OptionalAuthority) && (InFact(Flags.AuthorityFound) || 2112_flags |= Flags.AuthorityFound; 2120if (InFact(Flags.HasUnicode)) 2125_flags |= ((Flags)idx | Flags.UnknownHostType); 2138if (InFact(Flags.HasUnicode)) 2143_flags |= ((Flags)idx | Flags.UnknownHostType); 2150if (InFact(Flags.DosPath)) 2152_flags |= (((_flags & Flags.AuthorityFound) != 0) ? Flags.BasicHostType : Flags.UnknownHostType); 2153_flags |= (Flags)idx; 2177if (hostTerminator == '\\' && NotAny(Flags.ImplicitFile) && _syntax.NotAny(UriSyntaxFlags.AllowDOSPath)) 2182else if (!OperatingSystem.IsWindows() && hostTerminator == '/' && NotAny(Flags.ImplicitFile) && InFact(Flags.UncPath) && _syntax == UriParser.FileUri) 2195_flags |= (Flags)idx; 2211private unsafe void CreateUriInfo(Flags cF) 2226if ((cF & Flags.ImplicitFile) != 0) 2235if (StaticInFact(cF, Flags.UncPath)) 2240int end = (int)(cF & Flags.IndexMask); 2257if ((cF & Flags.AuthorityFound) != 0) 2263if ((cF & (Flags.UncPath | Flags.DosPath)) != 0) 2267int end = (int)(cF & Flags.IndexMask); 2282if ((cF & Flags.HostTypeMask) == Flags.UnknownHostType 2283|| StaticInFact(cF, Flags.DosPath) 2287info.Offset.User = (ushort)(cF & Flags.IndexMask); 2290cF &= ~Flags.IndexMask; 2293cF |= Flags.SchemeNotCanonical; 2301if (HostType == Flags.BasicHostType) 2304info.Offset.Path = (ushort)(cF & Flags.IndexMask); 2305cF &= ~Flags.IndexMask; 2309if ((cF & Flags.HasUserInfo) != 0) 2326idx = (int)(cF & Flags.IndexMask); 2330cF &= ~Flags.IndexMask; 2335cF |= Flags.SchemeNotCanonical; 2348if ((cF & Flags.HasUnicode) != 0) 2368cF |= (Flags.PortNotCanonical | Flags.E_PortNotCanonical); 2384cF |= Flags.NotDefaultPort; 2390cF |= (Flags.PortNotCanonical | Flags.E_PortNotCanonical); 2398cF |= Flags.MinimalUriInfoSet; 2402Flags current = _flags; 2403while ((current & Flags.MinimalUriInfoSet) == 0) 2405Flags oldValue = Interlocked.CompareExchange(ref _flags, (current & ~Flags.IndexMask) | cF, current); 2410current = (Flags)oldValue; 2426if (NotAny(Flags.ErrorOrParsingRecursion)) 2428_flags |= Flags.ErrorOrParsingRecursion; 2431_flags &= ~Flags.ErrorOrParsingRecursion; 2436Flags flags = _flags; 2443if (HostType == Flags.BasicHostType) 2456if (NotAny(Flags.ImplicitFile) || (result & Check.ReservedFound) != 0) 2458flags |= Flags.HostNotCanonical; 2462if (InFact(Flags.ImplicitFile) && (result & (Check.ReservedFound | Check.EscapedCanonical)) != 0) 2471flags |= Flags.E_HostNotCanonical; 2472if (NotAny(Flags.UserEscaped)) 2482else if (NotAny(Flags.CanonicalDnsHost)) 2488flags |= (Flags.HostNotCanonical | Flags.E_HostNotCanonical); 2497flags |= (Flags.HostNotCanonical | Flags.E_HostNotCanonical); 2509private static string CreateHostStringHelper(string str, int idx, int end, ref Flags flags, ref string? scopeId) 2513switch (flags & Flags.HostTypeMask) 2515case Flags.DnsHostType: 2519case Flags.IPv6HostType: 2525case Flags.IPv4HostType: 2529case Flags.UncHostType: 2533case Flags.BasicHostType: 2534if (StaticInFact(flags, Flags.DosPath)) 2551case Flags.UnknownHostType: 2562flags |= Flags.LoopbackHost; 2585Flags flags = _flags & ~Flags.HostTypeMask; 2594flags &= ~Flags.HostTypeMask; 2595flags |= Flags.UnknownHostType; 2599if (err != ParsingError.None || (flags & Flags.HostTypeMask) == Flags.UnknownHostType) 2602_flags = (_flags & ~Flags.HostTypeMask) | Flags.BasicHostType; 2611_flags |= (Flags.HostNotCanonical | Flags.E_HostNotCanonical); 2615_flags = (_flags & ~Flags.HostTypeMask) | (flags & Flags.HostTypeMask); 2626_flags &= ~Flags.NotDefaultPort; 2627_flags |= (Flags.PortNotCanonical | Flags.E_PortNotCanonical); 2641_flags &= ~Flags.NotDefaultPort; 2643_flags |= Flags.NotDefaultPort; 2645_flags |= (Flags.PortNotCanonical | Flags.E_PortNotCanonical); 2663Debug.Assert(_info != null && (_flags & Flags.MinimalUriInfoSet) != 0); 2668ushort nonCanonical = unchecked((ushort)(((ushort)_flags & ((ushort)Flags.CannotDisplayCanonical << 7)) >> 6)); 2669if (InFact(Flags.SchemeNotCanonical)) 2671nonCanonical |= (ushort)Flags.SchemeNotCanonical; 2677if (InFact(Flags.ShouldBeCompressed | Flags.FirstSlashAbsent | Flags.BackslashInPath)) 2679nonCanonical |= (ushort)Flags.PathNotCanonical; 2684nonCanonical |= (ushort)Flags.PathNotCanonical; 2702Debug.Assert(_info != null && (_flags & Flags.MinimalUriInfoSet) != 0); 2707ushort nonCanonical = unchecked((ushort)((ushort)_flags & (ushort)Flags.CannotDisplayCanonical)); 2712if ((_flags & (Flags.ShouldBeCompressed | Flags.FirstSlashAbsent | Flags.BackslashInPath)) != 0) 2714nonCanonical |= (ushort)Flags.PathNotCanonical; 2719nonCanonical |= (ushort)Flags.PathNotCanonical; 2779if (InFact(Flags.AuthorityFound)) 2788if ((parts & UriComponents.UserInfo) != 0 && InFact(Flags.HasUserInfo)) 2797if (NotAny(Flags.UserEscaped)) 2811InFact(Flags.UserEscaped) ? UnescapeMode.Unescape : UnescapeMode.EscapeUnescape, 2848if (formatAs != UriFormat.UriEscaped && HostType == Flags.BasicHostType 2854(InFact(Flags.UserEscaped) ? UnescapeMode.Unescape : UnescapeMode.EscapeUnescape); 2883if ((parts & UriComponents.SerializationInfoString) != 0 && HostType == Flags.IPv6HostType && _info.ScopeId != null) 2894(InFact(Flags.NotDefaultPort) || ((parts & UriComponents.StrongPort) != 0 && _syntax.DefaultPort != UriParser.NoDefaultPort))) 2913if (InFact(Flags.AuthorityFound) && dest.Length != 0 && dest[0] == '/') 2939if (NotAny(Flags.UserEscaped)) 2952V1ToStringUnescape => (InFact(Flags.UserEscaped) ? UnescapeMode.Unescape : UnescapeMode.EscapeUnescape) | UnescapeMode.V1ToStringFlag, 2954_ => InFact(Flags.UserEscaped) ? UnescapeMode.Unescape : UnescapeMode.EscapeUnescape 2978if (NotAny(Flags.UserEscaped)) 2991V1ToStringUnescape => (InFact(Flags.UserEscaped) ? UnescapeMode.Unescape : UnescapeMode.EscapeUnescape) | UnescapeMode.V1ToStringFlag, 2993_ => InFact(Flags.UserEscaped) ? UnescapeMode.Unescape : UnescapeMode.EscapeUnescape 3019if (!InFact(Flags.HasUserInfo)) 3029if (!InFact(Flags.HasUserInfo)) 3032if (InFact(Flags.NotDefaultPort) || _syntax.DefaultPort == UriParser.NoDefaultPort) 3047if (InFact(Flags.HasUserInfo)) 3080if (InFact(Flags.NotDefaultPort | Flags.PortNotCanonical)) 3092if (uriParts == UriComponents.Path && InFact(Flags.AuthorityFound) && 3133if (InFact(Flags.NotDefaultPort) || _syntax.DefaultPort == UriParser.NoDefaultPort) 3143if (InFact(Flags.HasUserInfo)) 3160if (NotAny(Flags.HasUserInfo)) 3201Flags cF = Flags.Zero; 3207bool buildIriStringFromPath = InFact(Flags.HasUnicode); 3223cF |= Flags.SchemeNotCanonical; 3232cF |= Flags.SchemeNotCanonical; 3236if (((_flags & Flags.AuthorityFound) != 0) && (idx + i + 3 >= length || str[idx + i + 1] != '/' || 3239cF |= Flags.SchemeNotCanonical; 3245if ((_flags & Flags.HasUserInfo) != 0) 3251cF |= Flags.UserNotCanonical; 3255cF |= Flags.E_UserNotCanonical; 3261cF |= Flags.UserIriCanonical; 3410if (((_flags & Flags.AuthorityFound) != 0) && ((syntaxFlags & UriSyntaxFlags.PathIsRooted) != 0) 3413cF |= Flags.FirstSlashAbsent; 3420if (IsDosPath || (((_flags & Flags.AuthorityFound) != 0) && 3426cF |= (Flags.E_PathNotCanonical | Flags.PathNotCanonical); 3432cF |= (Flags.E_PathNotCanonical | Flags.PathNotCanonical); 3436if (((syntaxFlags & (UriSyntaxFlags.CompressPath)) != 0) && ((cF & Flags.E_PathNotCanonical) != 0 || 3439cF |= Flags.ShouldBeCompressed; 3443cF |= Flags.BackslashInPath; 3448cF |= Flags.E_PathNotCanonical; 3458if (((_flags & Flags.ImplicitFile) == 0) || ((_flags & Flags.UserEscaped) != 0) || 3462cF |= Flags.PathNotCanonical; 3467if (((_flags & Flags.ImplicitFile) != 0) && (result & (Check.ReservedFound | Check.EscapedCanonical)) != 0) 3476cF |= Flags.E_PathNotCanonical; 3483cF |= Flags.PathIriCanonical; 3536cF |= Flags.QueryNotCanonical; 3541cF |= Flags.E_QueryNotCanonical; 3548cF |= Flags.QueryIriCanonical; 3590cF |= Flags.FragmentNotCanonical; 3595cF |= Flags.E_FragmentNotCanonical; 3602cF |= Flags.FragmentIriCanonical; 3609cF |= Flags.AllUriInfoSet; 3616private static int ParseSchemeCheckImplicitFile(string uriString, ref ParsingError err, ref Flags flags, ref UriParser? syntax) 3619Debug.Assert((flags & Flags.Debug_LeftConstructor) == 0); 3635flags |= (Flags.UnixPath | Flags.ImplicitFile | Flags.AuthorityFound); 3664flags |= (Flags.DosPath | Flags.ImplicitFile | Flags.AuthorityFound); 3681flags |= (Flags.UncPath | Flags.ImplicitFile | Flags.AuthorityFound); 3785ref ParsingError err, ref Flags flags, UriParser syntax, ref string? newHost) 3787Debug.Assert((_flags & Flags.Debug_LeftConstructor) == 0 || (!_syntax.IsSimple && Monitor.IsEntered(_info))); 3794bool hasUnicode = ((flags & Flags.HasUnicode) != 0); 3797Debug.Assert((_flags & Flags.HasUserInfo) == 0 && (_flags & Flags.HostTypeMask) == 0); 3810flags &= ~Flags.UncPath; //UNC cannot have an empty hostname 3811if (StaticInFact(flags, Flags.ImplicitFile)) 3814flags |= Flags.BasicHostType; 3836flags |= Flags.HasUserInfo; 3860flags |= Flags.IPv6HostType; 3868IPv4AddressHelper.IsValid(pString, start, ref end, false, StaticNotAny(flags, Flags.ImplicitFile), syntax.InFact(UriSyntaxFlags.V1_UnknownUri))) 3870flags |= Flags.IPv4HostType; 3878DomainNameHelper.IsValid(new ReadOnlySpan<char>(pString + start, end - start), iri: false, StaticNotAny(flags, Flags.ImplicitFile), out int domainNameLength)) 3883flags |= Flags.DnsHostType; 3888flags |= Flags.CanonicalDnsHost; 3893DomainNameHelper.IsValid(new ReadOnlySpan<char>(pString + start, end - start), iri: true, StaticNotAny(flags, Flags.ImplicitFile), out domainNameLength)) 3905if (UncNameHelper.IsValid(pString, start, ref end, StaticNotAny(flags, Flags.ImplicitFile))) 3909flags |= Flags.UncHostType; 3920if (end < length && pString[end] == '\\' && (flags & Flags.HostTypeMask) != Flags.HostNotParsed 3926flags |= Flags.UnknownHostType; 3929flags &= ~Flags.HostTypeMask; 3958flags &= ~Flags.HostTypeMask; 3973flags &= ~Flags.HostTypeMask; 3989flags &= ~Flags.HostTypeMask; 3994if ((flags & Flags.HostTypeMask) == Flags.HostNotParsed) 3997flags &= ~Flags.HasUserInfo; 4002flags |= Flags.BasicHostType; 4050flags |= Flags.UnknownHostType; 4055flags |= Flags.BasicHostType; 4076flags |= Flags.UnknownHostType; 4085bool hasUnicode, ref Flags flags, 4090flags |= Flags.DnsHostType; 4240if ((_flags & Flags.HasUnicode) != 0) 4296if (InFact(Flags.FirstSlashAbsent)) 4311if (InFact(Flags.ShouldBeCompressed)) 4318if (_syntax.InFact(UriSyntaxFlags.UnEscapeDotsAndSlashes) && InFact(Flags.PathNotCanonical) 4333if (InFact(Flags.E_PathNotCanonical) && NotAny(Flags.UserEscaped)) 4356if (!OperatingSystem.IsWindows() && InFact(Flags.BackslashInPath) && _syntax.NotAny(UriSyntaxFlags.ConvertPathSlashes) && _syntax.InFact(UriSyntaxFlags.FileLikeUri) && !IsImplicitFile) 4374if (InFact(Flags.ShouldBeCompressed)) 4379if (_syntax.InFact(UriSyntaxFlags.UnEscapeDotsAndSlashes) && InFact(Flags.PathNotCanonical) 4405if (InFact(Flags.ShouldBeCompressed) && dest.Length - offset > 0) 4413if (formatAs == UriFormat.UriEscaped && NotAny(Flags.UserEscaped) && InFact(Flags.E_PathNotCanonical)) 4430if (formatAs != UriFormat.UriEscaped && InFact(Flags.PathNotCanonical)) 4437mode = (InFact(Flags.UserEscaped) ? UnescapeMode.Unescape : UnescapeMode.EscapeUnescape) 4450mode = InFact(Flags.UserEscaped) ? UnescapeMode.Unescape : UnescapeMode.EscapeUnescape; 4771if (basePart.HostType == Flags.IPv6HostType) 4845if (basePart.HostType == Flags.IPv6HostType) 5163return InFact(Flags.AuthorityFound);

31Debug.Assert(_originalUnicodeString is null && _info is null && _syntax is null && _flags == Flags.Zero); 34_flags |= Flags.UserEscaped; 37_flags |= Flags.DisablePathAndQueryCanonicalization; 58if (NotAny(Flags.DosPath) && 61|| (!OperatingSystem.IsWindows() && InFact(Flags.UnixPath)))) 64_flags &= Flags.UserEscaped; // the only flag that makes sense for a relative uri 73else if (uriKind == UriKind.Relative && InFact(Flags.DosPath)) 76_flags &= Flags.UserEscaped; // the only flag that makes sense for a relative uri 95_flags |= Flags.HasUnicode; 112_flags &= Flags.UserEscaped; // the only flag that makes sense for a relative uri 147_flags |= Flags.UserDrivenParsing; 160_flags &= Flags.UserEscaped; // the only flag that makes sense for a relative uri 165if (err != ParsingError.None || InFact(Flags.ErrorOrParsingRecursion)) 169_flags = Flags.UserDrivenParsing | (_flags & Flags.UserEscaped); 201_flags &= (Flags.UserEscaped | Flags.HasUnicode); // the only flags that makes sense for a relative uri 473Flags nonCanonical = (_flags & (Flags.E_CannotDisplayCanonical | Flags.IriCanonical)); 476if ((nonCanonical & (Flags.UserIriCanonical | Flags.PathIriCanonical | Flags.QueryIriCanonical | Flags.FragmentIriCanonical)) != 0) 478if ((nonCanonical & (Flags.E_UserNotCanonical | Flags.UserIriCanonical)) == (Flags.E_UserNotCanonical | Flags.UserIriCanonical)) 480nonCanonical &= ~(Flags.E_UserNotCanonical | Flags.UserIriCanonical); 483if ((nonCanonical & (Flags.E_PathNotCanonical | Flags.PathIriCanonical)) == (Flags.E_PathNotCanonical | Flags.PathIriCanonical)) 485nonCanonical &= ~(Flags.E_PathNotCanonical | Flags.PathIriCanonical); 488if ((nonCanonical & (Flags.E_QueryNotCanonical | Flags.QueryIriCanonical)) == (Flags.E_QueryNotCanonical | Flags.QueryIriCanonical)) 490nonCanonical &= ~(Flags.E_QueryNotCanonical | Flags.QueryIriCanonical); 493if ((nonCanonical & (Flags.E_FragmentNotCanonical | Flags.FragmentIriCanonical)) == (Flags.E_FragmentNotCanonical | Flags.FragmentIriCanonical)) 495nonCanonical &= ~(Flags.E_FragmentNotCanonical | Flags.FragmentIriCanonical); 500if (((nonCanonical & Flags.E_CannotDisplayCanonical & (Flags.E_UserNotCanonical | Flags.E_PathNotCanonical | 501Flags.E_QueryNotCanonical | Flags.E_FragmentNotCanonical)) != Flags.Zero)) 507if (InFact(Flags.AuthorityFound)) 513if (InFact(Flags.UncPath | Flags.DosPath)) 525if (InFact(Flags.FirstSlashAbsent) && _info.Offset.Query > _info.Offset.Path) 531if (InFact(Flags.BackslashInPath)) 545if ((_flags & Flags.CanonicalDnsHost) == 0 && HostType != Flags.IPv6HostType) 559if ((_flags & (Flags.SchemeNotCanonical | Flags.AuthorityFound)) 560== (Flags.SchemeNotCanonical | Flags.AuthorityFound)) 737private Uri(Flags flags, UriParser? uriParser, string uri) 762Flags flags = Flags.Zero; 766flags |= Flags.UserEscaped; 769flags |= Flags.DisablePathAndQueryCanonicalization; 776return new Uri((flags & Flags.UserEscaped), null, uriString); 875if (baseUri.InFact(Flags.AuthorityFound)) 947if (((_flags & Flags.NotDefaultPort) != 0) || (uriComponents == UriComponents.StrongPort 964|| ((_flags & (Flags.HostNotCanonical | Flags.E_HostNotCanonical)) == 0))) 1060if (InFact(Flags.MinimalUriInfoSet)) 1062_flags &= ~(Flags.MinimalUriInfoSet | Flags.AllUriInfoSet | Flags.IndexMask); 1065if (InFact(Flags.NotDefaultPort)) 1079_flags |= (Flags)portIndex; // Port or path

77Debug.Assert(sizeof(Uri.Flags) == sizeof(ulong)); 80ulong previous = Interlocked.Or(ref Unsafe.As<Uri.Flags, ulong>(ref uri._flags), (ulong)Uri.Flags.CustomParser_ParseMinimalAlreadyCalled); 81if (((Uri.Flags)previous & Uri.Flags.CustomParser_ParseMinimalAlreadyCalled) != 0)

271Debug.Assert(sizeof(Uri.Flags) == sizeof(ulong)); 272Interlocked.Or(ref Unsafe.As<Uri.Flags, ulong>(ref thisUri._flags), (ulong)Uri.Flags.CustomParser_ParseMinimalAlreadyCalled);