internal static DeclarationModifiers MakeModifiers(NamedTypeSymbol containingType, SyntaxToken firstIdentifier, SyntaxTokenList modifiers, DiagnosticBag diagnostics, out bool modifierErrors)
{
DeclarationModifiers defaultAccess =
(containingType.IsInterface) ? DeclarationModifiers.Public : DeclarationModifiers.Private;
DeclarationModifiers allowedModifiers =
DeclarationModifiers.AccessibilityMask |
DeclarationModifiers.Const |
DeclarationModifiers.New |
DeclarationModifiers.Static |
DeclarationModifiers.Fixed |
DeclarationModifiers.Unsafe |
DeclarationModifiers.Abstract; // filtered out later
var errorLocation = new SourceLocation(firstIdentifier);
DeclarationModifiers result = ModifierUtils.MakeAndCheckNontypeMemberModifiers(false, modifiers, defaultAccess, allowedModifiers, errorLocation, diagnostics, out modifierErrors);
if ((result & DeclarationModifiers.Abstract) != 0)
{
diagnostics.Add(ErrorCode.ERR_AbstractField, errorLocation);
result &= ~DeclarationModifiers.Abstract;
}
if ((result & DeclarationModifiers.Fixed) != 0)
{
if ((result & DeclarationModifiers.Static) != 0)
{
// The modifier 'static' is not valid for this item
diagnostics.Add(ErrorCode.ERR_BadMemberFlag, errorLocation, SyntaxFacts.GetText(SyntaxKind.StaticKeyword));
}
if ((result & DeclarationModifiers.Const) != 0)
{
// The modifier 'const' is not valid for this item
diagnostics.Add(ErrorCode.ERR_BadMemberFlag, errorLocation, SyntaxFacts.GetText(SyntaxKind.ConstKeyword));
}
result &= ~(DeclarationModifiers.Static | DeclarationModifiers.Immutable | DeclarationModifiers.Const);
Debug.Assert((result & ~(DeclarationModifiers.AccessibilityMask | DeclarationModifiers.Fixed | DeclarationModifiers.Unsafe | DeclarationModifiers.New)) == 0);
}
if ((result & DeclarationModifiers.Const) != 0)
{
if ((result & DeclarationModifiers.Static) != 0)
{
// The constant '{0}' cannot be marked static
diagnostics.Add(ErrorCode.ERR_StaticConstant, errorLocation, firstIdentifier.ValueText);
}
if ((result & DeclarationModifiers.Unsafe) != 0)
{
// The modifier 'unsafe' is not valid for this item
diagnostics.Add(ErrorCode.ERR_BadMemberFlag, errorLocation, SyntaxFacts.GetText(SyntaxKind.UnsafeKeyword));
}
result |= DeclarationModifiers.Static; // "constants are considered static members"
}
else
{
// NOTE: always cascading on a const, so suppress.
// NOTE: we're being a bit sneaky here - we're using the containingType rather than this symbol
// to determine whether or not unsafe is allowed. Since this symbol and the containing type are
// in the same compilation, it won't make a difference. We do, however, have to pass the error
// location explicitly.
containingType.CheckUnsafeModifier(result, errorLocation, diagnostics);
}
return(result);
}
internal SynthesizedStaticConstructor(NamedTypeSymbol containingType)
{
_containingType = containingType;
}
/// <summary>
/// Lookup an immediately nested type referenced from metadata, names should be
/// compared case-sensitively.
/// </summary>
/// <param name="emittedTypeName">
/// Simple type name, possibly with generic name mangling.
/// </param>
/// <returns>
/// Symbol for the type, or MissingMetadataSymbol if the type isn't found.
/// </returns>
internal virtual NamedTypeSymbol LookupMetadataType(ref MetadataTypeName emittedTypeName)
{
Debug.Assert(!emittedTypeName.IsNull);
NamespaceOrTypeSymbol scope = this;
if (scope.Kind == SymbolKind.ErrorType)
{
return(new MissingMetadataTypeSymbol.Nested((NamedTypeSymbol)scope, ref emittedTypeName));
}
NamedTypeSymbol namedType = null;
ImmutableArray <NamedTypeSymbol> namespaceOrTypeMembers;
bool isTopLevel = scope.IsNamespace;
Debug.Assert(!isTopLevel || scope.ToDisplayString(SymbolDisplayFormat.QualifiedNameOnlyFormat) == emittedTypeName.NamespaceName);
if (emittedTypeName.IsMangled)
{
Debug.Assert(!emittedTypeName.UnmangledTypeName.Equals(emittedTypeName.TypeName) && emittedTypeName.InferredArity > 0);
if (emittedTypeName.ForcedArity == -1 || emittedTypeName.ForcedArity == emittedTypeName.InferredArity)
{
// Let's handle mangling case first.
namespaceOrTypeMembers = scope.GetTypeMembers(emittedTypeName.UnmangledTypeName);
foreach (var named in namespaceOrTypeMembers)
{
if (emittedTypeName.InferredArity == named.Arity && named.MangleName)
{
if ((object)namedType != null)
{
namedType = null;
break;
}
namedType = named;
}
}
}
}
else
{
Debug.Assert(ReferenceEquals(emittedTypeName.UnmangledTypeName, emittedTypeName.TypeName) && emittedTypeName.InferredArity == 0);
}
// Now try lookup without removing generic arity mangling.
int forcedArity = emittedTypeName.ForcedArity;
if (emittedTypeName.UseCLSCompliantNameArityEncoding)
{
// Only types with arity 0 are acceptable, we already examined types with mangled names.
if (emittedTypeName.InferredArity > 0)
{
goto Done;
}
else if (forcedArity == -1)
{
forcedArity = 0;
}
else if (forcedArity != 0)
{
goto Done;
}
else
{
Debug.Assert(forcedArity == emittedTypeName.InferredArity);
}
}
namespaceOrTypeMembers = scope.GetTypeMembers(emittedTypeName.TypeName);
foreach (var named in namespaceOrTypeMembers)
{
if (!named.MangleName && (forcedArity == -1 || forcedArity == named.Arity))
{
if ((object)namedType != null)
{
namedType = null;
break;
}
namedType = named;
}
}
Done:
if ((object)namedType == null)
{
if (isTopLevel)
{
return(new MissingMetadataTypeSymbol.TopLevel(scope.ContainingModule, ref emittedTypeName));
}
else
{
return(new MissingMetadataTypeSymbol.Nested((NamedTypeSymbol)scope, ref emittedTypeName));
}
}
return(namedType);
}
internal FieldSymbol AsMember(NamedTypeSymbol newOwner)
{
Debug.Assert(this.IsDefinition);
//Debug.Assert(ReferenceEquals(newOwner.OriginalDefinition, this.ContainingSymbol.OriginalDefinition));
return(newOwner.IsDefinition ? this : new SubstitutedFieldSymbol(newOwner as SubstitutedNamedTypeSymbol, this));
}
private SynthesizedEntryPointSymbol(NamedTypeSymbol containingType)
{
Debug.Assert((object)containingType != null);
_containingType = containingType;
}
private static void StructDependsClosure(NamedTypeSymbol type, HashSet <Symbol> partialClosure, NamedTypeSymbol on)
{
Debug.Assert((object)type != null);
if ((object)type.OriginalDefinition == on)
{
// found a possibly expanding cycle, for example
// struct X<T> { public T t; }
// struct W<T> { X<W<W<T>>> x; }
// while not explicitly forbidden by the spec, it should be.
partialClosure.Add(on);
return;
}
if (partialClosure.Add(type))
{
foreach (var member in type.GetMembersUnordered())
{
var field = member as FieldSymbol;
var fieldType = field?.NonPointerType();
if (fieldType is null || fieldType.TypeKind != TypeKind.Struct || field.IsStatic)
{
continue;
}
StructDependsClosure((NamedTypeSymbol)fieldType, partialClosure, on);
}
}
}
private static (bool definitelyManaged, bool hasGenerics) DependsOnDefinitelyManagedType(NamedTypeSymbol type, HashSet <Symbol> partialClosure)
{
Debug.Assert((object)type != null);
var hasGenerics = false;
if (partialClosure.Add(type))
{
foreach (var member in type.GetInstanceFieldsAndEvents())
{
// Only instance fields (including field-like events) affect the outcome.
FieldSymbol field;
switch (member.Kind)
{
case SymbolKind.Field:
field = (FieldSymbol)member;
Debug.Assert((object)(field.AssociatedSymbol as EventSymbol) == null,
"Didn't expect to find a field-like event backing field in the member list.");
break;
case SymbolKind.Event:
field = ((EventSymbol)member).AssociatedField;
break;
default:
throw ExceptionUtilities.UnexpectedValue(member.Kind);
}
if ((object)field == null)
{
continue;
}
TypeSymbol fieldType = field.NonPointerType();
if (fieldType is null)
{
// pointers are unmanaged
continue;
}
NamedTypeSymbol fieldNamedType = fieldType as NamedTypeSymbol;
if ((object)fieldNamedType == null)
{
if (fieldType.IsManagedType)
{
return(true, hasGenerics);
}
}
else
{
var result = IsManagedTypeHelper(fieldNamedType);
hasGenerics = hasGenerics || result.hasGenerics;
// NOTE: don't use ManagedKind.get on a NamedTypeSymbol - that could lead
// to infinite recursion.
switch (result.isManaged)
{
case ThreeState.True:
return(true, hasGenerics);
case ThreeState.False:
continue;
case ThreeState.Unknown:
if (!fieldNamedType.OriginalDefinition.KnownCircularStruct)
{
var(definitelyManaged, childHasGenerics) = DependsOnDefinitelyManagedType(fieldNamedType, partialClosure);
hasGenerics = hasGenerics || childHasGenerics;
if (definitelyManaged)
{
return(true, hasGenerics);
}
}
continue;
}
}
}
}
return(false, hasGenerics);
}
internal SynthesizedInstanceConstructor(NamedTypeSymbol containingType)
{
Debug.Assert((object)containingType != null);
_containingType = containingType;
}