internal bool AreNullableAnnotationsEnabled(SyntaxTree syntaxTree, int position)
{
CSharpSyntaxTree csTree = (CSharpSyntaxTree)syntaxTree;
Syntax.NullableContextState context = csTree.GetNullableContextState(position);
return(context.AnnotationsState switch
{
Syntax.NullableContextState.State.Enabled => true,
Syntax.NullableContextState.State.Disabled => false,
Syntax.NullableContextState.State.ExplicitlyRestored => GetGlobalAnnotationState(),
Syntax.NullableContextState.State.Unknown =>
!csTree.IsGeneratedCode(this.Compilation.Options.SyntaxTreeOptionsProvider, CancellationToken.None) &&
AreNullableAnnotationsGloballyEnabled(),
_ => throw ExceptionUtilities.UnexpectedValue(context.AnnotationsState)
});
private static void GetRawDiagnosticInfos(bool isNullableEnabled, CSharpSyntaxTree tree, ArrayBuilder <DiagnosticInfo> infos)
{
const MessageID featureId = MessageID.IDS_FeatureNullableReferenceTypes;
var info = featureId.GetFeatureAvailabilityDiagnosticInfoOpt(tree.Options);
if (info is object)
{
infos.Add(info);
}
if (!isNullableEnabled && info?.Severity != DiagnosticSeverity.Error)
{
var code = tree.IsGeneratedCode() ? ErrorCode.WRN_MissingNonNullTypesContextForAnnotationInGeneratedCode : ErrorCode.WRN_MissingNonNullTypesContextForAnnotation;
infos.Add(new CSDiagnosticInfo(code));
}
}