public static bool IsAllowedAccessibility(SyntaxNode node, Accessibility accessibility, bool allowOverride = false)
{
switch (node.Parent?.Kind())
{
case SyntaxKind.NamespaceDeclaration:
case SyntaxKind.CompilationUnit:
{
return(accessibility.Is(Accessibility.Public, Accessibility.Internal));
}
case SyntaxKind.StructDeclaration:
{
if (accessibility.ContainsProtected())
{
return(false);
}
break;
}
}
switch (node.Kind())
{
case SyntaxKind.ClassDeclaration:
case SyntaxKind.InterfaceDeclaration:
case SyntaxKind.StructDeclaration:
case SyntaxKind.EnumDeclaration:
{
return(true);
}
case SyntaxKind.EventDeclaration:
{
var eventDeclaration = (EventDeclarationSyntax)node;
ModifiersInfo info = SyntaxInfo.ModifiersInfo(eventDeclaration);
return((allowOverride || !info.HasOverride) &&
(!accessibility.IsPrivate() || !info.HasAbstractOrVirtualOrOverride) &&
CheckProtectedInStaticOrSealedClass(node, accessibility) &&
CheckAccessorAccessibility(eventDeclaration.AccessorList, accessibility));
}
case SyntaxKind.IndexerDeclaration:
{
var indexerDeclaration = (IndexerDeclarationSyntax)node;
ModifiersInfo info = SyntaxInfo.ModifiersInfo(indexerDeclaration);
return((allowOverride || !info.HasOverride) &&
(!accessibility.IsPrivate() || !info.HasAbstractOrVirtualOrOverride) &&
CheckProtectedInStaticOrSealedClass(node, accessibility) &&
CheckAccessorAccessibility(indexerDeclaration.AccessorList, accessibility));
}
case SyntaxKind.PropertyDeclaration:
{
var propertyDeclaration = (PropertyDeclarationSyntax)node;
ModifiersInfo info = SyntaxInfo.ModifiersInfo(propertyDeclaration);
return((allowOverride || !info.HasOverride) &&
(!accessibility.IsPrivate() || !info.HasAbstractOrVirtualOrOverride) &&
CheckProtectedInStaticOrSealedClass(node, accessibility) &&
CheckAccessorAccessibility(propertyDeclaration.AccessorList, accessibility));
}
case SyntaxKind.MethodDeclaration:
{
var methodDeclaration = (MethodDeclarationSyntax)node;
ModifiersInfo info = SyntaxInfo.ModifiersInfo(methodDeclaration);
return((allowOverride || !info.HasOverride) &&
(!accessibility.IsPrivate() || !info.HasAbstractOrVirtualOrOverride) &&
CheckProtectedInStaticOrSealedClass(node, accessibility));
}
case SyntaxKind.EventFieldDeclaration:
{
var eventFieldDeclaration = (EventFieldDeclarationSyntax)node;
ModifiersInfo info = SyntaxInfo.ModifiersInfo(eventFieldDeclaration);
return((allowOverride || !info.HasOverride) &&
(!accessibility.IsPrivate() || !info.HasAbstractOrVirtualOrOverride) &&
CheckProtectedInStaticOrSealedClass(node, accessibility));
}
case SyntaxKind.ConstructorDeclaration:
case SyntaxKind.DelegateDeclaration:
case SyntaxKind.FieldDeclaration:
case SyntaxKind.IncompleteMember:
{
return(CheckProtectedInStaticOrSealedClass(node, accessibility));
}
case SyntaxKind.OperatorDeclaration:
case SyntaxKind.ConversionOperatorDeclaration:
{
return(accessibility == Accessibility.Public);
}
case SyntaxKind.GetAccessorDeclaration:
case SyntaxKind.SetAccessorDeclaration:
case SyntaxKind.AddAccessorDeclaration:
case SyntaxKind.RemoveAccessorDeclaration:
case SyntaxKind.UnknownAccessorDeclaration:
{
var memberDeclaration = node.Parent?.Parent as MemberDeclarationSyntax;
Debug.Assert(memberDeclaration != null, node.ToString());
if (memberDeclaration != null)
{
if (!CheckProtectedInStaticOrSealedClass(memberDeclaration, accessibility))
{
return(false);
}
Accessibility declarationAccessibility = memberDeclaration.GetModifiers().GetAccessibility();
if (declarationAccessibility == Accessibility.NotApplicable)
{
declarationAccessibility = memberDeclaration.GetDefaultExplicitAccessibility();
}
return(accessibility.IsMoreRestrictiveThan(declarationAccessibility));
}
return(false);
}
case SyntaxKind.LocalFunctionStatement:
{
return(false);
}
default:
{
Debug.Fail(node.Kind().ToString());
return(false);
}
}
}
