public static async Task <int> AllLinesTo(this TextReader source,
ITargetBlock <string> target,
bool completeAndAwait = false,
CancellationToken cancellationToken = default)
{
if (source is null)
{
throw new NullReferenceException();
}
Contract.EndContractBlock();
var count = 0;
string line;
while (!cancellationToken.IsCancellationRequested &&
(line = await source.ReadLineAsync()) is not null)
{
if (!target.Post(line) && !await target.SendAsync(line, cancellationToken))
{
break;
}
count++;
}
cancellationToken.ThrowIfCancellationRequested();
if (completeAndAwait)
{
await target.CompleteAsync();
}
return(count);
}