internal SynthesizedStateMachineProperty(
MethodSymbol interfacePropertyGetter,
StateMachineTypeSymbol stateMachineType)
{
_name = ExplicitInterfaceHelpers.GetMemberName(interfacePropertyGetter.AssociatedSymbol.Name, interfacePropertyGetter.ContainingType, aliasQualifierOpt: null);
var getterName = ExplicitInterfaceHelpers.GetMemberName(interfacePropertyGetter.Name, interfacePropertyGetter.ContainingType, aliasQualifierOpt: null);
_getter = new SynthesizedStateMachineDebuggerHiddenMethod(
getterName,
interfacePropertyGetter,
stateMachineType,
associatedProperty: this,
hasMethodBodyDependency: false);
}
public SynthesizedImplementationMethod(
MethodSymbol interfaceMethod,
NamedTypeSymbol implementingType,
string name = null,
bool generateDebugInfo = true,
PropertySymbol associatedProperty = null)
{
//it does not make sense to add methods to substituted types
Debug.Assert(implementingType.IsDefinition);
_name = name ?? ExplicitInterfaceHelpers.GetMemberName(interfaceMethod.Name, interfaceMethod.ContainingType, aliasQualifierOpt: null);
_implementingType = implementingType;
_generateDebugInfo = generateDebugInfo;
_associatedProperty = associatedProperty;
_explicitInterfaceImplementations = ImmutableArray.Create <MethodSymbol>(interfaceMethod);
// alpha-rename to get the implementation's type parameters
var typeMap = interfaceMethod.ContainingType.TypeSubstitution ?? TypeMap.Empty;
typeMap.WithAlphaRename(interfaceMethod, this, out _typeParameters);
_interfaceMethod = interfaceMethod.ConstructIfGeneric(TypeArguments);
_parameters = SynthesizedParameterSymbol.DeriveParameters(_interfaceMethod, this);
}
public bool Equals(Symbol member1, Symbol member2)
{
if (ReferenceEquals(member1, member2))
{
return(true);
}
if ((object)member1 == null || (object)member2 == null || member1.Kind != member2.Kind)
{
return(false);
}
bool sawInterfaceInName1 = false;
bool sawInterfaceInName2 = false;
if (_considerName)
{
string name1 = ExplicitInterfaceHelpers.GetMemberNameWithoutInterfaceName(member1.Name);
string name2 = ExplicitInterfaceHelpers.GetMemberNameWithoutInterfaceName(member2.Name);
sawInterfaceInName1 = name1 != member1.Name;
sawInterfaceInName2 = name2 != member2.Name;
if (name1 != name2)
{
return(false);
}
}
// NB: up to, and including, this check, we have not actually forced the (type) parameters
// to be expanded - we're only using the counts.
int arity = member1.GetMemberArity();
if ((arity != member2.GetMemberArity()) ||
(member1.GetParameterCount() != member2.GetParameterCount()))
{
return(false);
}
TypeMap typeMap1;
TypeMap typeMap2;
if (arity > 0 && _useSpecialHandlingForNullableTypes)
{
// We need this special handling in order to avoid forcing resolution of nullable types
// in signature of an overriding member while we are looking for a matching overridden member.
// Doing the resolution in the original signature can send us into an infinite cycle because
// constraints must be inherited from the member we are looking for.
// It is important to ensure that the fact whether an indexed type parameter we are about to use
// is a reference type is inherited from the corresponding type parameter of the possibly overridden
// member (which is member2 when _useSpecialHandlingForNullableTypes is true). This will ensure
// proper resolution for nullable types in substituted signature of member1, ensuring proper
// comparison of types across both members.
ArrayBuilder <TypeParameterSymbol> builder = ArrayBuilder <TypeParameterSymbol> .GetInstance(arity);
var typeParameters2 = member2.GetMemberTypeParameters();
for (int i = arity - 1; i >= 0; i--)
{
builder.Add(IndexedTypeParameterSymbolForOverriding.GetTypeParameter(i, typeParameters2[i].IsValueType));
}
var indexed = builder.ToImmutableAndFree();
typeMap1 = new TypeMap(member1.GetMemberTypeParameters(), indexed, true);
typeMap2 = new TypeMap(typeParameters2, indexed, true);
}
else
{
typeMap1 = GetTypeMap(member1);
typeMap2 = GetTypeMap(member2);
}
if ((_considerReturnRefKindDifferences || _considerReturnType) && !HaveSameReturnTypes(member1, typeMap1, member2, typeMap2, _typeComparison))
{
return(false);
}
if (member1.GetParameterCount() > 0 && !HaveSameParameterTypes(member1.GetParameters(), typeMap1, member2.GetParameters(), typeMap2,
_considerRefKindDifferences, _typeComparison))
{
return(false);
}
if (_considerCallingConvention)
{
if (GetCallingConvention(member1) != GetCallingConvention(member2))
{
return(false);
}
}
else
{
if (IsVarargMethod(member1) != IsVarargMethod(member2))
{
return(false);
}
}
if (_considerExplicitlyImplementedInterfaces)
{
if (sawInterfaceInName1 != sawInterfaceInName2)
{
return(false);
}
// The purpose of this check is to determine whether the interface parts of the member names agree,
// but to do so using robust symbolic checks, rather than syntactic ones. Therefore, if neither member
// name contains an interface name, this check is not relevant.
// Phrased differently, the explicitly implemented interface is not part of the signature unless it's
// part of the name.
if (sawInterfaceInName1)
{
Debug.Assert(sawInterfaceInName2);
// May avoid realizing interface members.
if (member1.IsExplicitInterfaceImplementation() != member2.IsExplicitInterfaceImplementation())
{
return(false);
}
// By comparing symbols, rather than syntax, we gain the flexibility of ignoring whitespace
// and gracefully accepting multiple names for the same (or equivalent) types (e.g. "I<int>.M"
// vs "I<System.Int32>.M"), but we lose the connection with the name. For example, in metadata,
// a method name "I.M" could have nothing to do with "I" but explicitly implement interface "I2".
// We will behave as if the method was really named "I2.M". Furthermore, in metadata, a method
// can explicitly implement more than one interface method, in which case it doesn't really
// make sense to pretend that all of them are part of the signature.
var explicitInterfaceImplementations1 = member1.GetExplicitInterfaceImplementations();
var explicitInterfaceImplementations2 = member2.GetExplicitInterfaceImplementations();
if (!explicitInterfaceImplementations1.SetEquals(explicitInterfaceImplementations2, EqualityComparer <Symbol> .Default))
{
return(false);
}
}
}
return(!_considerTypeConstraints || HaveSameConstraints(member1, typeMap1, member2, typeMap2));
}
internal SourceCustomEventSymbol(SourceMemberContainerTypeSymbol containingType, Binder binder, EventDeclarationSyntax syntax, DiagnosticBag diagnostics) :
base(containingType, syntax, syntax.Modifiers, syntax.ExplicitInterfaceSpecifier, syntax.Identifier, diagnostics)
{
ExplicitInterfaceSpecifierSyntax interfaceSpecifier = syntax.ExplicitInterfaceSpecifier;
SyntaxToken nameToken = syntax.Identifier;
bool isExplicitInterfaceImplementation = interfaceSpecifier != null;
string aliasQualifierOpt;
_name = ExplicitInterfaceHelpers.GetMemberNameAndInterfaceSymbol(binder, interfaceSpecifier, nameToken.ValueText, diagnostics, out _explicitInterfaceType, out aliasQualifierOpt);
_type = BindEventType(binder, syntax.Type, diagnostics);
var explicitlyImplementedEvent = this.FindExplicitlyImplementedEvent(_explicitInterfaceType, nameToken.ValueText, interfaceSpecifier, diagnostics);
this.FindExplicitlyImplementedMemberVerification(explicitlyImplementedEvent, diagnostics);
// The runtime will not treat the accessors of this event as overrides or implementations
// of those of another event unless both the signatures and the custom modifiers match.
// Hence, in the case of overrides and *explicit* implementations, we need to copy the custom
// modifiers that are in the signatures of the overridden/implemented event accessors.
// (From source, we know that there can only be one overridden/implemented event, so there
// are no conflicts.) This is unnecessary for implicit implementations because, if the custom
// modifiers don't match, we'll insert bridge methods for the accessors (explicit implementations
// that delegate to the implicit implementations) with the correct custom modifiers
// (see SourceMemberContainerTypeSymbol.SynthesizeInterfaceMemberImplementation).
// Note: we're checking if the syntax indicates explicit implementation rather,
// than if explicitInterfaceType is null because we don't want to look for an
// overridden event if this is supposed to be an explicit implementation.
if (!isExplicitInterfaceImplementation)
{
// If this event is an override, we may need to copy custom modifiers from
// the overridden event (so that the runtime will recognize it as an override).
// We check for this case here, while we can still modify the parameters and
// return type without losing the appearance of immutability.
if (this.IsOverride)
{
EventSymbol overriddenEvent = this.OverriddenEvent;
if ((object)overriddenEvent != null)
{
CopyEventCustomModifiers(overriddenEvent, ref _type, ContainingAssembly);
}
}
}
else if ((object)explicitlyImplementedEvent != null)
{
CopyEventCustomModifiers(explicitlyImplementedEvent, ref _type, ContainingAssembly);
}
AccessorDeclarationSyntax addSyntax = null;
AccessorDeclarationSyntax removeSyntax = null;
foreach (AccessorDeclarationSyntax accessor in syntax.AccessorList.Accessors)
{
switch (accessor.Kind())
{
case SyntaxKind.AddAccessorDeclaration:
if (addSyntax == null)
{
addSyntax = accessor;
}
else
{
diagnostics.Add(ErrorCode.ERR_DuplicateAccessor, accessor.Keyword.GetLocation());
}
break;
case SyntaxKind.RemoveAccessorDeclaration:
if (removeSyntax == null)
{
removeSyntax = accessor;
}
else
{
diagnostics.Add(ErrorCode.ERR_DuplicateAccessor, accessor.Keyword.GetLocation());
}
break;
case SyntaxKind.GetAccessorDeclaration:
case SyntaxKind.SetAccessorDeclaration:
diagnostics.Add(ErrorCode.ERR_AddOrRemoveExpected, accessor.Keyword.GetLocation());
break;
case SyntaxKind.UnknownAccessorDeclaration:
// Don't need to handle UnknownAccessorDeclaration. An error will have
// already been produced for it in the parser.
break;
default:
throw ExceptionUtilities.UnexpectedValue(accessor.Kind());
}
}
_addMethod = CreateAccessorSymbol(addSyntax, explicitlyImplementedEvent, aliasQualifierOpt, diagnostics);
_removeMethod = CreateAccessorSymbol(removeSyntax, explicitlyImplementedEvent, aliasQualifierOpt, diagnostics);
if (containingType.IsInterfaceType())
{
if (addSyntax == null && removeSyntax == null) //NOTE: AND - different error code produced if one is present
{
// CONSIDER: we're matching dev10, but it would probably be more helpful to give
// an error like ERR_EventPropertyInInterface.
diagnostics.Add(ErrorCode.ERR_EventNeedsBothAccessors, this.Locations[0], this);
}
}
else
{
if (addSyntax == null || removeSyntax == null)
{
diagnostics.Add(ErrorCode.ERR_EventNeedsBothAccessors, this.Locations[0], this);
}
}
_explicitInterfaceImplementations =
(object)explicitlyImplementedEvent == null ?
ImmutableArray <EventSymbol> .Empty :
ImmutableArray.Create <EventSymbol>(explicitlyImplementedEvent);
}
internal SourceCustomEventAccessorSymbol(
SourceEventSymbol @event,
AccessorDeclarationSyntax syntax,
EventSymbol explicitlyImplementedEventOpt,
string aliasQualifierOpt,
DiagnosticBag diagnostics)
: base(@event,
syntax.GetReference(),
ImmutableArray.Create(syntax.Keyword.GetLocation()))
{
Debug.Assert(syntax != null);
Debug.Assert(syntax.Kind() == SyntaxKind.AddAccessorDeclaration || syntax.Kind() == SyntaxKind.RemoveAccessorDeclaration);
bool isAdder = syntax.Kind() == SyntaxKind.AddAccessorDeclaration;
string name;
ImmutableArray <MethodSymbol> explicitInterfaceImplementations;
if ((object)explicitlyImplementedEventOpt == null)
{
name = SourceEventSymbol.GetAccessorName(@event.Name, isAdder);
explicitInterfaceImplementations = ImmutableArray <MethodSymbol> .Empty;
}
else
{
MethodSymbol implementedAccessor = isAdder ? explicitlyImplementedEventOpt.AddMethod : explicitlyImplementedEventOpt.RemoveMethod;
string accessorName = (object)implementedAccessor != null ? implementedAccessor.Name : SourceEventSymbol.GetAccessorName(explicitlyImplementedEventOpt.Name, isAdder);
name = ExplicitInterfaceHelpers.GetMemberName(accessorName, explicitlyImplementedEventOpt.ContainingType, aliasQualifierOpt);
explicitInterfaceImplementations = (object)implementedAccessor == null ? ImmutableArray <MethodSymbol> .Empty : ImmutableArray.Create <MethodSymbol>(implementedAccessor);
}
_explicitInterfaceImplementations = explicitInterfaceImplementations;
_name = name;
this.MakeFlags(
isAdder ? MethodKind.EventAdd : MethodKind.EventRemove,
@event.Modifiers,
returnsVoid: false, // until we learn otherwise (in LazyMethodChecks).
isExtensionMethod: false,
isMetadataVirtualIgnoringModifiers: explicitInterfaceImplementations.Any());
if (@event.ContainingType.IsInterface)
{
diagnostics.Add(ErrorCode.ERR_EventPropertyInInterface, this.Location);
}
else
{
if (syntax.Body != null || syntax.ExpressionBody != null)
{
if (IsExtern && !IsAbstract)
{
diagnostics.Add(ErrorCode.ERR_ExternHasBody, this.Location, this);
}
else if (IsAbstract && !IsExtern)
{
diagnostics.Add(ErrorCode.ERR_AbstractHasBody, this.Location, this);
}
// Do not report error for IsAbstract && IsExtern. Dev10 reports CS0180 only
// in that case ("member cannot be both extern and abstract").
}
}
_name = GetOverriddenAccessorName(@event, isAdder) ?? _name;
if (syntax.Modifiers.Count > 0)
{
diagnostics.Add(ErrorCode.ERR_NoModifiersOnAccessor, syntax.Modifiers[0].GetLocation());
}
CheckForBlockAndExpressionBody(
syntax.Body, syntax.ExpressionBody, syntax, diagnostics);
}
