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);

1359private bool CheckLocalRefEscape(SyntaxNode node, BoundLocal local, SafeContext escapeTo, bool checkingReceiver, BindingDiagnosticBag diagnostics) 1516private static EscapeLevel? EscapeLevelFromScope(SafeContext lifetime) => lifetime switch 1523private static SafeContext GetParameterValEscape(ParameterSymbol parameter) 1527{ EffectiveScope: ScopedKind.ScopedValue } => SafeContext.CurrentMethod, 1528{ RefKind: RefKind.Out, UseUpdatedEscapeRules: true } => SafeContext.ReturnOnly, 1529_ => SafeContext.CallingMethod 1536private static SafeContext GetParameterRefEscape(ParameterSymbol parameter) 1540{ RefKind: RefKind.None } => SafeContext.CurrentMethod, 1541{ EffectiveScope: ScopedKind.ScopedRef } => SafeContext.CurrentMethod, 1542{ HasUnscopedRefAttribute: true, UseUpdatedEscapeRules: true, RefKind: RefKind.Out } => SafeContext.ReturnOnly, 1543{ HasUnscopedRefAttribute: true, UseUpdatedEscapeRules: true, IsThis: false } => SafeContext.CallingMethod, 1544_ => SafeContext.ReturnOnly 1551private bool CheckParameterValEscape(SyntaxNode node, ParameterSymbol parameter, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 1569private bool CheckParameterRefEscape(SyntaxNode node, BoundExpression parameter, ParameterSymbol parameterSymbol, SafeContext escapeTo, bool checkingReceiver, BindingDiagnosticBag diagnostics) 1571var refSafeToEscape = GetParameterRefEscape(parameterSymbol); 1775private SafeContext GetFieldRefEscape(BoundFieldAccess fieldAccess) 1782return SafeContext.CallingMethod; 1798private bool CheckFieldRefEscape(SyntaxNode node, BoundFieldAccess fieldAccess, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 1822private bool CheckFieldLikeEventRefEscape(SyntaxNode node, BoundEventAccess eventAccess, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 2220internal SafeContext GetInterpolatedStringHandlerConversionEscapeScope( 2231SafeContext escapeScope = GetValEscape(data.Construction); 2252private SafeContext GetInvocationEscapeScope( 2270SafeContext getInvocationEscapeWithOldRules(ref readonly MethodInvocationInfo methodInvocationInfo, bool isRefEscape) 2284SafeContext escapeScope = SafeContext.CallingMethod; 2304SafeContext argumentEscape = (isRefEscape, argumentIsRefEscape) switch 2334private SafeContext GetInvocationEscapeWithUpdatedRules( 2339SafeContext escapeScope = SafeContext.CallingMethod; 2360SafeContext argEscape = isArgumentRefEscape ? 2377private SafeContext GetInvocationEscapeToReceiver( 2381SafeContext escapeScope = SafeContext.CallingMethod; 2388SafeContext argEscape = isArgumentRefEscape 2466SafeContext escapeTo, 2485bool checkingReceiver, SafeContext escapeTo, 2562SafeContext escapeTo, 2615SafeContext escapeTo, 3199SafeContext escapeTo = _localScopeDepth; 3233var inferredDestinationValEscape = SafeContext.CallingMethod; 3281var toArgEscape = GetValEscape(mixableArg.Argument); 3320var inferredDestinationValEscape = SafeContext.CallingMethod; 3596private static ErrorCode GetStandardRValueRefEscapeError(SafeContext escapeTo) 3680internal void ValidateEscape(BoundExpression expr, SafeContext escapeTo, bool isByRef, BindingDiagnosticBag diagnostics) 3703internal SafeContext GetRefEscape(BoundExpression expr) 3712return SafeContext.CallingMethod; 3718return SafeContext.CallingMethod; 3735return SafeContext.CallingMethod; 3741return SafeContext.CurrentMethod; 3798return SafeContext.CallingMethod; 3810return SafeContext.CallingMethod; 3865return SafeContext.CallingMethod; 3870return SafeContext.CallingMethod; 3980internal bool CheckRefEscape(SyntaxNode node, BoundExpression expr, SafeContext escapeTo, bool checkingReceiver, BindingDiagnosticBag diagnostics) 4317internal SafeContext GetBroadestValEscape(BoundTupleExpression expr) 4319SafeContext broadest = _localScopeDepth; 4322SafeContext valEscape; 4343internal SafeContext GetValEscape(BoundExpression expr) 4352return SafeContext.CallingMethod; 4358return SafeContext.CallingMethod; 4364return SafeContext.CallingMethod; 4379return SafeContext.CallingMethod; 4387return SafeContext.CallingMethod; 4399return SafeContext.CallingMethod; 4402return SafeContext.CallingMethod; 4419return SafeContext.CurrentMethod; 4424var consEscape = GetValEscape(conditional.Consequence); 4449return SafeContext.CallingMethod; 4461return SafeContext.CallingMethod; 4508return SafeContext.CallingMethod; 4545var escape = GetInvocationEscapeScope( 4562var escape = SafeContext.CallingMethod; 4603SafeContext.CallingMethod; 4697return (range.LeftOperandOpt is { } left ? GetValEscape(left) : SafeContext.CallingMethod) 4698.Intersect(range.RightOperandOpt is { } right ? GetValEscape(right) : SafeContext.CallingMethod); 4746return SafeContext.CallingMethod; 4824private SafeContext GetTupleValEscape(ImmutableArray<BoundExpression> elements) 4826SafeContext narrowestScope = _localScopeDepth; 4835private SafeContext GetValEscapeOfCollectionInitializer(BoundCollectionInitializerExpression colExpr) 4837var result = SafeContext.CallingMethod; 4854private SafeContext GetValEscapeOfObjectInitializer(BoundObjectInitializerExpression initExpr) 4856var result = SafeContext.CallingMethod; 4859var exprResult = GetValEscapeOfObjectMemberInitializer(expr); 4866private SafeContext GetValEscapeOfObjectMemberInitializer(BoundExpression expr) 4868SafeContext result; 4872var rightEscape = assignment.IsRef 4897SafeContext getIndexerEscape( 4900SafeContext rightEscapeScope) 4906return SafeContext.CallingMethod; 4913return SafeContext.CallingMethod; 4934SafeContext receiverEscapeScope = SafeContext.CallingMethod; 4944SafeContext escapeScope = escapeValue.IsRefEscape 4954SafeContext getPropertyEscape( 4956SafeContext rightEscapeScope) 4962return SafeContext.CallingMethod; 4971private SafeContext GetValEscape(ImmutableArray<BoundExpression> expressions) 4973var result = SafeContext.CallingMethod; 4987internal bool CheckValEscape(SyntaxNode node, BoundExpression expr, SafeContext escapeTo, bool checkingReceiver, BindingDiagnosticBag diagnostics) 5077if (!SafeContext.CurrentMethod.IsConvertibleTo(escapeTo)) 5751private bool CheckTupleValEscape(ImmutableArray<BoundExpression> elements, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 5766private bool CheckValEscapeOfCollectionInitializer(BoundCollectionInitializerExpression colExpr, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 5791private bool CheckValEscapeOfObjectInitializer(BoundObjectInitializerExpression initExpr, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 5807private bool CheckInterpolatedStringHandlerConversionEscape(BoundExpression expression, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 5834private SafeContext GetValEscapeOfInterpolatedStringHandlerCalls(BoundExpression expression) 5836SafeContext scope = SafeContext.CallingMethod; 5855SafeContext getPartsScope(BoundInterpolatedString interpolatedString) 5857SafeContext scope = SafeContext.CallingMethod; 5875private bool CheckValEscapeOfInterpolatedStringHandlerCalls(BoundExpression expression, SafeContext escapeTo, BindingDiagnosticBag diagnostics) 5898bool checkParts(BoundInterpolatedString interpolatedString, SafeContext escapeTo, BindingDiagnosticBag diagnostics)

5980SafeContext whenTrueEscape = GetValEscape(trueExpr); 5981SafeContext whenFalseEscape = GetValEscape(falseExpr);

1570var leftEscape = GetRefEscape(op1); 1571var rightEscape = GetRefEscape(op2); 1630var 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)