public override void VisitLocalFunctionStatement(LocalFunctionStatementSyntax node)
{
Symbol oldMethod = _containingMemberOrLambda;
Binder binder = _enclosing;
LocalFunctionSymbol match = FindLocalFunction(node, _enclosing);
if ((object)match != null)
{
_containingMemberOrLambda = match;
binder = match.IsGenericMethod
? new WithMethodTypeParametersBinder(match, _enclosing)
: _enclosing;
binder = binder.WithUnsafeRegionIfNecessary(node.Modifiers);
binder = new InMethodBinder(match, binder);
}
BlockSyntax blockBody = node.Body;
if (blockBody != null)
{
Visit(blockBody, binder);
}
ArrowExpressionClauseSyntax arrowBody = node.ExpressionBody;
if (arrowBody != null)
{
Visit(arrowBody, binder);
}
_containingMemberOrLambda = oldMethod;
}
private void ComputeBinderMap()
{
SmallDictionary <SyntaxNode, Binder> map;
ImmutableArray <MethodSymbol> methodSymbolsWithYield;
// Ensure that the member symbol is a method symbol.
if ((object)_memberSymbol != null && _root != null)
{
var methodsWithYield = ArrayBuilder <SyntaxNode> .GetInstance();
var symbolsWithYield = ArrayBuilder <MethodSymbol> .GetInstance();
map = LocalBinderFactory.BuildMap(_memberSymbol, _root, this, methodsWithYield, _binderUpdatedHandler);
foreach (var methodWithYield in methodsWithYield)
{
Binder binder = this;
if (methodWithYield.Kind() != SyntaxKind.GlobalStatement &&
(methodWithYield == _root || map.TryGetValue(methodWithYield, out binder)))
{
Symbol containing = binder.ContainingMemberOrLambda;
// get the closest enclosing InMethodBinder and make it an iterator
InMethodBinder inMethod = null;
while (binder != null)
{
inMethod = binder as InMethodBinder;
if (inMethod != null)
{
break;
}
binder = binder.Next;
}
if (inMethod != null && (object)inMethod.ContainingMemberOrLambda == containing)
{
inMethod.MakeIterator();
symbolsWithYield.Add((MethodSymbol)inMethod.ContainingMemberOrLambda);
}
else
{
Debug.Assert(methodWithYield == _root && methodWithYield is ExpressionSyntax);
}
}
else
{
// skip over it, this is an error
}
}
methodsWithYield.Free();
methodSymbolsWithYield = symbolsWithYield.ToImmutableAndFree();
}
else
{
map = SmallDictionary <SyntaxNode, Binder> .Empty;
methodSymbolsWithYield = ImmutableArray <MethodSymbol> .Empty;
}
Interlocked.CompareExchange(ref _lazyBinderMap, map, null);
ImmutableInterlocked.InterlockedCompareExchange(ref _methodSymbolsWithYield, methodSymbolsWithYield, default(ImmutableArray <MethodSymbol>));
}
internal override bool EnsureSingleDefinition(Symbol symbol, string name, Location location, DiagnosticBag diagnostics)
{
ParameterSymbol existingDeclaration;
var map = this.definitionMap;
if (map != null && map.TryGetValue(name, out existingDeclaration))
{
return(InMethodBinder.ReportConflictWithParameter(existingDeclaration, symbol, name, location, diagnostics));
}
return(false);
}
public void ValidateIteratorMethods(DiagnosticBag diagnostics)
{
foreach (var iterator in MethodSymbolsWithYield)
{
foreach (var parameter in iterator.Parameters)
{
if (parameter.RefKind != RefKind.None)
{
diagnostics.Add(ErrorCode.ERR_BadIteratorArgType, parameter.Locations[0]);
}
else if (parameter.Type.IsUnsafe())
{
diagnostics.Add(ErrorCode.ERR_UnsafeIteratorArgType, parameter.Locations[0]);
}
}
Location errorLocation = iterator.Locations[0];
if (iterator.IsVararg)
{
// error CS1636: __arglist is not allowed in the parameter list of iterators
diagnostics.Add(ErrorCode.ERR_VarargsIterator, errorLocation);
}
if (((iterator as SourceMemberMethodSymbol)?.IsUnsafe == true || (iterator as LocalFunctionSymbol)?.IsUnsafe == true) &&
Compilation.Options.AllowUnsafe) // Don't cascade
{
diagnostics.Add(ErrorCode.ERR_IllegalInnerUnsafe, errorLocation);
}
var returnType = iterator.ReturnType;
RefKind refKind = iterator.RefKind;
TypeWithAnnotations elementType = InMethodBinder.GetIteratorElementTypeFromReturnType(Compilation, refKind, returnType, errorLocation, diagnostics);
if (elementType.IsDefault)
{
if (refKind != RefKind.None)
{
Error(diagnostics, ErrorCode.ERR_BadIteratorReturnRef, errorLocation, iterator);
}
else if (!returnType.IsErrorType())
{
Error(diagnostics, ErrorCode.ERR_BadIteratorReturn, errorLocation, iterator, returnType);
}
}
bool asyncInterface = InMethodBinder.IsAsyncStreamInterface(Compilation, refKind, returnType);
if (asyncInterface && !iterator.IsAsync)
{
diagnostics.Add(ErrorCode.ERR_IteratorMustBeAsync, errorLocation, iterator, returnType);
}
}
}
internal Binder GetFieldInitializerBinder(FieldSymbol fieldSymbol, bool suppressBinderFlagsFieldInitializer = false)
{
Debug.Assert((ContainingMemberOrLambda is TypeSymbol containing && TypeSymbol.Equals(containing, fieldSymbol.ContainingType, TypeCompareKind.ConsiderEverything2)) || //should be the binder for the type
fieldSymbol.ContainingType.IsImplicitClass); //however, we also allow fields in namespaces to help support script scenarios
Binder binder = this;
if (!fieldSymbol.IsStatic && fieldSymbol.ContainingType.GetMembersUnordered().OfType <SynthesizedRecordConstructor>().SingleOrDefault() is SynthesizedRecordConstructor recordCtor)
{
binder = new InMethodBinder(recordCtor, binder);
}
return(new LocalScopeBinder(binder).WithAdditionalFlagsAndContainingMemberOrLambda(suppressBinderFlagsFieldInitializer ? BinderFlags.None : BinderFlags.FieldInitializer, fieldSymbol));
}
internal InMethodBinder GetRecordConstructorInMethodBinder(SynthesizedRecordConstructor constructor)
{
RecordDeclarationSyntax typeDecl = constructor.GetSyntax();
var extraInfo = NodeUsage.ConstructorBodyOrInitializer;
var key = BinderFactoryVisitor.CreateBinderCacheKey(typeDecl, extraInfo);
if (!_binderCache.TryGetValue(key, out Binder resultBinder))
{
// Ctors cannot be generic
Debug.Assert(constructor.Arity == 0, "Generic Ctor, What to do?");
resultBinder = new InMethodBinder(constructor, GetInRecordBodyBinder(typeDecl));
_binderCache.TryAdd(key, resultBinder);
}
return((InMethodBinder)resultBinder);
}
public override void VisitLocalFunctionStatement(LocalFunctionStatementSyntax node)
{
var body = (CSharpSyntaxNode)node.Body ?? node.ExpressionBody;
LocalFunctionSymbol match = null;
// Don't use LookupLocalFunction because it recurses up the tree, as it
// should be defined in the directly enclosing block (see note below)
foreach (var candidate in _enclosing.LocalFunctions)
{
if (candidate.Locations[0] == node.Identifier.GetLocation())
{
match = candidate;
}
}
bool oldSawYield = _sawYield;
_sawYield = false;
if (match != null)
{
var oldMethod = _method;
_method = match;
Binder addToMap;
if (match.IsGenericMethod)
{
addToMap = new WithMethodTypeParametersBinder(match, _enclosing);
}
else
{
addToMap = _enclosing;
}
addToMap = new InMethodBinder(match, addToMap);
AddToMap(node, addToMap);
if (body != null)
{
Visit(body, addToMap);
}
_method = oldMethod;
}
else
{
// The enclosing block should have found this node and created a LocalFunctionMethodSymbol
// The code that does so is in LocalScopeBinder.BuildLocalFunctions
if (body != null)
{
// do our best to attempt to bind
Visit(body);
}
}
if (_sawYield)
{
_methodsWithYields.Add(node);
}
_sawYield = oldSawYield;
}