public NullabilityAttributeSymbols GetSymbols(Compilation compilation,
CancellationToken cancellationToken = default(CancellationToken))
{
Guard.NotNull(compilation, nameof(compilation));
NullabilityAttributeSymbols symbolsSnapshot = symbols.Value;
NullabilityAttributeMetadataNames previousNames =
symbolsSnapshot?.GetMetadataNames() ?? names.Value ?? LastSeenNames.Value;
symbolsSnapshot = previousNames?.GetSymbolsOrNull(compilation);
if (symbolsSnapshot == null)
{
var provider = new SimpleNullabilityAttributeProvider();
symbolsSnapshot = provider.GetSymbols(compilation, cancellationToken);
}
if (symbolsSnapshot != null)
{
names.Value = symbolsSnapshot.GetMetadataNames();
LastSeenNames.Value = names.Value;
}
symbols.Value = symbolsSnapshot;
return(symbolsSnapshot);
}
public NullabilityAttributeSymbols Scan([NotNull] Compilation compilation, CancellationToken cancellationToken)
{
Guard.NotNull(compilation, nameof(compilation));
NullabilityAttributeSymbols result = ScanInSources(compilation, cancellationToken);
return(result ?? ScanInReferences(compilation, cancellationToken));
}