FirstAsync<TSource>
using System.Runtime.CompilerServices;
namespace System.Reactive.Linq.ObservableImpl
{
[System.Runtime.CompilerServices.NullableContext(1)]
[System.Runtime.CompilerServices.Nullable(0)]
internal static class FirstAsync<[System.Runtime.CompilerServices.Nullable(2)] TSource>
{
[System.Runtime.CompilerServices.Nullable(new byte[] {
0,
1,
1,
0
})]
internal sealed class Sequence : Producer<TSource, Sequence._>
{
[System.Runtime.CompilerServices.Nullable(new byte[] {
0,
1
})]
internal sealed class _ : IdentitySink<TSource>
{
private bool _found;
public _(IObserver<TSource> observer)
: base(observer)
{
}
public override void OnNext(TSource value)
{
_found = true;
ForwardOnNext(value);
ForwardOnCompleted();
}
public override void OnCompleted()
{
if (!_found)
try {
throw new InvalidOperationException(Strings_Linq.NO_ELEMENTS);
} catch (Exception error) {
ForwardOnError(error);
}
}
}
private readonly IObservable<TSource> _source;
public Sequence(IObservable<TSource> source)
{
_source = source;
}
[return: System.Runtime.CompilerServices.Nullable(new byte[] {
1,
0
})]
protected override _ CreateSink(IObserver<TSource> observer)
{
return new _(observer);
}
protected override void Run([System.Runtime.CompilerServices.Nullable(new byte[] {
1,
0
})] _ sink)
{
sink.Run(_source);
}
}
[System.Runtime.CompilerServices.Nullable(new byte[] {
0,
1,
1,
0
})]
internal sealed class Predicate : Producer<TSource, Predicate._>
{
[System.Runtime.CompilerServices.Nullable(new byte[] {
0,
1
})]
internal sealed class _ : IdentitySink<TSource>
{
private readonly Func<TSource, bool> _predicate;
private bool _found;
public _(Func<TSource, bool> predicate, IObserver<TSource> observer)
: base(observer)
{
_predicate = predicate;
}
public override void OnNext(TSource value)
{
bool flag;
try {
flag = _predicate(value);
} catch (Exception error) {
ForwardOnError(error);
return;
}
if (flag) {
_found = true;
ForwardOnNext(value);
ForwardOnCompleted();
}
}
public override void OnCompleted()
{
if (!_found)
try {
throw new InvalidOperationException(Strings_Linq.NO_MATCHING_ELEMENTS);
} catch (Exception error) {
ForwardOnError(error);
}
}
}
private readonly IObservable<TSource> _source;
private readonly Func<TSource, bool> _predicate;
public Predicate(IObservable<TSource> source, Func<TSource, bool> predicate)
{
_source = source;
_predicate = predicate;
}
[return: System.Runtime.CompilerServices.Nullable(new byte[] {
1,
0
})]
protected override _ CreateSink(IObserver<TSource> observer)
{
return new _(_predicate, observer);
}
protected override void Run([System.Runtime.CompilerServices.Nullable(new byte[] {
1,
0
})] _ sink)
{
sink.Run(_source);
}
}
}
}