internal sealed override TypeSymbolWithAnnotations GetFieldType(ConsList <FieldSymbol> fieldsBeingBound)
{
Debug.Assert(fieldsBeingBound != null);
if (!_lazyType.IsNull)
{
return(_lazyType.ToType());
}
var declarator = VariableDeclarationNode;
var fieldSyntax = GetFieldDeclaration(declarator);
var typeSyntax = fieldSyntax.Declaration.Type;
var compilation = this.DeclaringCompilation;
var diagnostics = DiagnosticBag.GetInstance();
TypeSymbolWithAnnotations type = default;
// When we have multiple declarators, we report the type diagnostics on only the first.
DiagnosticBag diagnosticsForFirstDeclarator = DiagnosticBag.GetInstance();
Symbol associatedPropertyOrEvent = this.AssociatedSymbol;
if ((object)associatedPropertyOrEvent != null && associatedPropertyOrEvent.Kind == SymbolKind.Event)
{
EventSymbol @event = (EventSymbol)associatedPropertyOrEvent;
if (@event.IsWindowsRuntimeEvent)
{
NamedTypeSymbol tokenTableType = this.DeclaringCompilation.GetWellKnownType(WellKnownType.core_runtime_WindowsRuntime_EventRegistrationTokenTable_T);
Binder.ReportUseSiteDiagnostics(tokenTableType, diagnosticsForFirstDeclarator, this.ErrorLocation);
// CONSIDER: Do we want to guard against the possibility that someone has created their own EventRegistrationTokenTable<T>
// type that has additional generic constraints?
type = TypeSymbolWithAnnotations.Create(tokenTableType.Construct(ImmutableArray.Create(@event.Type)));
}
else
{
type = @event.Type;
}
}
else
{
var binderFactory = compilation.GetBinderFactory(SyntaxTree);
var binder = binderFactory.GetBinder(declarator);
binder = binder.WithAdditionalFlagsAndContainingMemberOrLambda(BinderFlags.SuppressConstraintChecks, this);
if (!ContainingType.IsScriptClass)
{
type = binder.BindType(typeSyntax, diagnosticsForFirstDeclarator);
}
else if (typeSyntax == null)
{
if (this.IsConst)
{
diagnosticsForFirstDeclarator.Add(ErrorCode.ERR_ImplicitlyTypedVariableCannotBeConst, typeSyntax.Location);
}
if (fieldsBeingBound.ContainsReference(this))
{
diagnostics.Add(ErrorCode.ERR_RecursivelyTypedVariable, this.ErrorLocation, this);
type = default;
}
else if (this.IsConst && this.ContainingType.IsScriptClass)
{
// For const var in script, we won't try to bind the initializer (case below), as it can lead to an unbound recursion
type = default;
}
else
{
fieldsBeingBound = new ConsList <FieldSymbol>(this, fieldsBeingBound);
var initializerBinder = new ImplicitlyTypedFieldBinder(binder, fieldsBeingBound);
var initializerOpt = initializerBinder.BindInferredVariableInitializer(diagnostics, RefKind.None, (EqualsValueClauseSyntax)declarator.Initializer, declarator);
if (initializerOpt != null)
{
if ((object)initializerOpt.Type != null && !initializerOpt.Type.IsErrorType())
{
type = TypeSymbolWithAnnotations.Create(initializerOpt.Type);
}
_lazyFieldTypeInferred = 1;
}
}
if (type.IsNull)
{
type = TypeSymbolWithAnnotations.Create(binder.CreateErrorType("var"));
}
}
else
{
type = binder.BindType(typeSyntax, diagnostics);
}
if (IsFixedSizeBuffer)
{
type = TypeSymbolWithAnnotations.Create(new PointerTypeSymbol(type));
if (ContainingType.TypeKind != TypeKind.Struct)
{
diagnostics.Add(ErrorCode.ERR_FixedNotInStruct, ErrorLocation);
}
var elementType = ((PointerTypeSymbol)type.TypeSymbol).PointedAtType.TypeSymbol;
int elementSize = elementType.FixedBufferElementSizeInBytes();
if (elementSize == 0)
{
var loc = typeSyntax.Location;
diagnostics.Add(ErrorCode.ERR_IllegalFixedType, loc);
}
if (!binder.InUnsafeRegion)
{
diagnosticsForFirstDeclarator.Add(ErrorCode.ERR_UnsafeNeeded, declarator.Location);
}
}
}
// update the lazyType only if it contains value last seen by the current thread:
if (_lazyType.InterlockedInitialize(type.WithModifiers(this.RequiredCustomModifiers)))
{
TypeChecks(type.TypeSymbol, diagnostics);
// CONSIDER: SourceEventFieldSymbol would like to suppress these diagnostics.
compilation.DeclarationDiagnostics.AddRange(diagnostics);
compilation.DeclarationDiagnostics.AddRange(diagnosticsForFirstDeclarator);
state.NotePartComplete(CompletionPart.Type);
}
diagnostics.Free();
diagnosticsForFirstDeclarator.Free();
return(_lazyType.ToType());
}
