41public static readonly SafeContext CallingMethod = new SafeContext(CallingMethodRaw); 47public static readonly SafeContext ReturnOnly = new SafeContext(ReturnOnlyRaw); 53public static readonly SafeContext CurrentMethod = new SafeContext(CurrentMethodRaw); 58public static readonly SafeContext Empty = new SafeContext(uint.MaxValue); 67return new SafeContext(_value + 1); 77return new SafeContext(_value - 1);

1343private bool CheckLocalRefEscape(SyntaxNode node, BoundLocal local, SafeContext escapeTo, bool checkingReceiver, BindingDiagnosticBag diagnostics) 1500private static EscapeLevel? EscapeLevelFromScope(SafeContext lifetime) => lifetime switch 1507private static SafeContext GetParameterValEscape(ParameterSymbol parameter) 1511{ EffectiveScope: ScopedKind.ScopedValue } => SafeContext.CurrentMethod, 1512{ RefKind: RefKind.Out, UseUpdatedEscapeRules: true } => SafeContext.ReturnOnly, 1513_ => SafeContext.CallingMethod 1520private static SafeContext GetParameterRefEscape(ParameterSymbol parameter) 1524{ RefKind: RefKind.None } => SafeContext.CurrentMethod, 1525{ EffectiveScope: ScopedKind.ScopedRef } => SafeContext.CurrentMethod, 1526{ HasUnscopedRefAttribute: true, UseUpdatedEscapeRules: true, RefKind: RefKind.Out } => SafeContext.ReturnOnly, 1527{ HasUnscopedRefAttribute: true, UseUpdatedEscapeRules: true, IsThis: false } => SafeContext.CallingMethod, 1528_ => SafeContext.ReturnOnly 1535private bool CheckParameterValEscape(SyntaxNode node, ParameterSymbol parameter, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 1553private bool CheckParameterRefEscape(SyntaxNode node, BoundExpression parameter, ParameterSymbol parameterSymbol, SafeContext escapeTo, bool checkingReceiver, BindingDiagnosticBag diagnostics) 1555var refSafeToEscape = GetParameterRefEscape(parameterSymbol); 1759private SafeContext GetFieldRefEscape(BoundFieldAccess fieldAccess) 1766return SafeContext.CallingMethod; 1782private bool CheckFieldRefEscape(SyntaxNode node, BoundFieldAccess fieldAccess, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 1806private bool CheckFieldLikeEventRefEscape(SyntaxNode node, BoundEventAccess eventAccess, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 2204internal SafeContext GetInterpolatedStringHandlerConversionEscapeScope( 2215SafeContext escapeScope = GetValEscape(data.Construction); 2236private SafeContext GetInvocationEscapeScope( 2254SafeContext getInvocationEscapeWithOldRules(ref readonly MethodInvocationInfo methodInvocationInfo, bool isRefEscape) 2268SafeContext escapeScope = SafeContext.CallingMethod; 2288SafeContext argumentEscape = (isRefEscape, argumentIsRefEscape) switch 2318private SafeContext GetInvocationEscapeWithUpdatedRules( 2323SafeContext escapeScope = SafeContext.CallingMethod; 2344SafeContext argEscape = isArgumentRefEscape ? 2361private SafeContext GetInvocationEscapeToReceiver( 2365SafeContext escapeScope = SafeContext.CallingMethod; 2372SafeContext argEscape = isArgumentRefEscape 2450SafeContext escapeTo, 2469bool checkingReceiver, SafeContext escapeTo, 2546SafeContext escapeTo, 2599SafeContext escapeTo, 3183SafeContext escapeTo = _localScopeDepth; 3217var inferredDestinationValEscape = SafeContext.CallingMethod; 3265var toArgEscape = GetValEscape(mixableArg.Argument); 3304var inferredDestinationValEscape = SafeContext.CallingMethod; 3580private static ErrorCode GetStandardRValueRefEscapeError(SafeContext escapeTo) 3664internal void ValidateEscape(BoundExpression expr, SafeContext escapeTo, bool isByRef, BindingDiagnosticBag diagnostics) 3687internal SafeContext GetRefEscape(BoundExpression expr) 3696return SafeContext.CallingMethod; 3702return SafeContext.CallingMethod; 3719return SafeContext.CallingMethod; 3725return SafeContext.CurrentMethod; 3782return SafeContext.CallingMethod; 3794return SafeContext.CallingMethod; 3849return SafeContext.CallingMethod; 3854return SafeContext.CallingMethod; 3964internal bool CheckRefEscape(SyntaxNode node, BoundExpression expr, SafeContext escapeTo, bool checkingReceiver, BindingDiagnosticBag diagnostics) 4301internal SafeContext GetBroadestValEscape(BoundTupleExpression expr) 4303SafeContext broadest = _localScopeDepth; 4306SafeContext valEscape; 4327internal SafeContext GetValEscape(BoundExpression expr) 4336return SafeContext.CallingMethod; 4342return SafeContext.CallingMethod; 4348return SafeContext.CallingMethod; 4363return SafeContext.CallingMethod; 4371return SafeContext.CallingMethod; 4383return SafeContext.CallingMethod; 4386return SafeContext.CallingMethod; 4403return SafeContext.CurrentMethod; 4408var consEscape = GetValEscape(conditional.Consequence); 4433return SafeContext.CallingMethod; 4445return SafeContext.CallingMethod; 4492return SafeContext.CallingMethod; 4529var escape = GetInvocationEscapeScope( 4546var escape = SafeContext.CallingMethod; 4587SafeContext.CallingMethod; 4681return (range.LeftOperandOpt is { } left ? GetValEscape(left) : SafeContext.CallingMethod) 4682.Intersect(range.RightOperandOpt is { } right ? GetValEscape(right) : SafeContext.CallingMethod); 4730return SafeContext.CallingMethod; 4808private SafeContext GetTupleValEscape(ImmutableArray<BoundExpression> elements) 4810SafeContext narrowestScope = _localScopeDepth; 4819private SafeContext GetValEscapeOfCollectionInitializer(BoundCollectionInitializerExpression colExpr) 4821var result = SafeContext.CallingMethod; 4838private SafeContext GetValEscapeOfObjectInitializer(BoundObjectInitializerExpression initExpr) 4840var result = SafeContext.CallingMethod; 4843var exprResult = GetValEscapeOfObjectMemberInitializer(expr); 4850private SafeContext GetValEscapeOfObjectMemberInitializer(BoundExpression expr) 4852SafeContext result; 4856var rightEscape = assignment.IsRef 4881SafeContext getIndexerEscape( 4884SafeContext rightEscapeScope) 4890return SafeContext.CallingMethod; 4897return SafeContext.CallingMethod; 4918SafeContext receiverEscapeScope = SafeContext.CallingMethod; 4928SafeContext escapeScope = escapeValue.IsRefEscape 4938SafeContext getPropertyEscape( 4940SafeContext rightEscapeScope) 4946return SafeContext.CallingMethod; 4955private SafeContext GetValEscape(ImmutableArray<BoundExpression> expressions) 4957var result = SafeContext.CallingMethod; 4971internal bool CheckValEscape(SyntaxNode node, BoundExpression expr, SafeContext escapeTo, bool checkingReceiver, BindingDiagnosticBag diagnostics) 5061if (!SafeContext.CurrentMethod.IsConvertibleTo(escapeTo)) 5735private bool CheckTupleValEscape(ImmutableArray<BoundExpression> elements, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 5750private bool CheckValEscapeOfCollectionInitializer(BoundCollectionInitializerExpression colExpr, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 5775private bool CheckValEscapeOfObjectInitializer(BoundObjectInitializerExpression initExpr, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 5791private bool CheckInterpolatedStringHandlerConversionEscape(BoundExpression expression, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 5818private SafeContext GetValEscapeOfInterpolatedStringHandlerCalls(BoundExpression expression) 5820SafeContext scope = SafeContext.CallingMethod; 5839SafeContext getPartsScope(BoundInterpolatedString interpolatedString) 5841SafeContext scope = SafeContext.CallingMethod; 5859private bool CheckValEscapeOfInterpolatedStringHandlerCalls(BoundExpression expression, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 5882bool checkParts(BoundInterpolatedString interpolatedString, SafeContext escapeTo, BindingDiagnosticBag diagnostics)

5979SafeContext whenTrueEscape = GetValEscape(trueExpr); 5980SafeContext whenFalseEscape = GetValEscape(falseExpr);

1569var leftEscape = GetRefEscape(op1); 1570var rightEscape = GetRefEscape(op2); 1629var leftEscape = GetValEscape(op1);

65private SafeContext _localScopeDepth; 66private Dictionary<LocalSymbol, (SafeContext RefEscapeScope, SafeContext ValEscapeScope)>? _localEscapeScopes; 68private SafeContext _patternInputValEscape; 88_localScopeDepth = SafeContext.CurrentMethod; 108_analysis.AddLocalScopes(local, refEscapeScope: _analysis._localScopeDepth, valEscapeScope: SafeContext.CallingMethod); 145private readonly SafeContext _previousInputValEscape; 147public PatternInput(RefSafetyAnalysis analysis, SafeContext patternInputValEscape) 187public static SafeContextAndLocation Create(SafeContext context 200public readonly SafeContext Context; 206private SafeContextAndLocation(SafeContext context 220private (SafeContext RefEscapeScope, SafeContext ValEscapeScope) GetLocalScopes(LocalSymbol local) 226: (SafeContext.CurrentMethod, SafeContext.CallingMethod); 229private void SetLocalScopes(LocalSymbol local, SafeContext refEscapeScope, SafeContext valEscapeScope) 263private SafeContext GetPlaceholderScope(BoundValuePlaceholderBase placeholder) 269: SafeContext.CallingMethod; 410SafeContext valEscapeScope = node.ExpressionOpt is { } expr 496private void AddLocalScopes(LocalSymbol local, SafeContext refEscapeScope, SafeContext valEscapeScope) 512SafeContext.CurrentMethod; 515SafeContext.CallingMethod; 523private void AddOrSetLocalScopes(LocalSymbol local, SafeContext refEscapeScope, SafeContext valEscapeScope) 525_localEscapeScopes ??= new Dictionary<LocalSymbol, (SafeContext RefEscapeScope, SafeContext ValEscapeScope)>(); 546(SafeContext refEscapeScope, SafeContext valEscapeScope) = GetLocalScopes(localSymbol); 584ValidateEscape(expr, SafeContext.ReturnOnly, node.RefKind != RefKind.None, _diagnostics); 594ValidateEscape(expr, SafeContext.ReturnOnly, isByRef: false, _diagnostics); 648static SafeContext getDeclarationValEscape(BoundTypeExpression typeExpression, SafeContext valEscape) 653return typeExpression.Type.IsRefLikeOrAllowsRefLikeType() ? valEscape : SafeContext.CallingMethod; 703static SafeContext getPositionalValEscape(Symbol? symbol, SafeContext valEscape) 707: symbol.GetTypeOrReturnType().IsRefLikeOrAllowsRefLikeType() ? valEscape : SafeContext.CallingMethod; 716static SafeContext getMemberValEscape(BoundPropertySubpatternMember? member, SafeContext valEscape) 720return member.Type.IsRefLikeOrAllowsRefLikeType() ? valEscape : SafeContext.CallingMethod; 882SafeContext valEscapeScope; 893valEscapeScope = SafeContext.CallingMethod; 920SafeContext getArgumentEscapeScope(int nArgumentsVisited, ImmutableArray<BoundExpression> arguments, int argIndex) 922SafeContext valEscapeScope; 930valEscapeScope = SafeContext.CallingMethod; // Consider skipping this placeholder entirely since SafeContext.CallingMethod is the fallback in GetPlaceholderScope(). 1002var escapeFrom = GetValEscape(node.InitializerExpressionOpt); 1086private void GetAwaitableInstancePlaceholders(ArrayBuilder<(BoundValuePlaceholderBase, SafeContextAndLocation)> placeholders, BoundAwaitableInfo awaitableInfo, SafeContext valEscapeScope) 1160SafeContext valEscape = nestedVariables is null 1201internal readonly SafeContext ValEscape; 1204internal DeconstructionVariable(BoundExpression expression, SafeContext valEscape, ArrayBuilder<DeconstructionVariable>? nestedVariables) 1225? new DeconstructionVariable(expr, valEscape: SafeContext.Empty, GetDeconstructionAssignmentVariables(tuple)) 1252SafeContext collectionEscape;

41public static readonly SafeContext CallingMethod = new SafeContext(CallingMethodRaw); 47public static readonly SafeContext ReturnOnly = new SafeContext(ReturnOnlyRaw); 53public static readonly SafeContext CurrentMethod = new SafeContext(CurrentMethodRaw); 58public static readonly SafeContext Empty = new SafeContext(uint.MaxValue); 64public SafeContext Narrower() 74public SafeContext Wider() 86public bool IsConvertibleTo(SafeContext other) 97public SafeContext Intersect(SafeContext other) 104public SafeContext Union(SafeContext other) 108public bool Equals(SafeContext other) 112=> obj is SafeContext other && this.Equals(other); 117public static bool operator ==(SafeContext lhs, SafeContext rhs) 120public static bool operator !=(SafeContext lhs, SafeContext rhs)