public static T Oldest <T>(this ISequenceView <T> sequence)
{
if (sequence == null)
{
throw new ArgumentNullException(nameof(sequence));
}
return(sequence.IsStack
? sequence.Poke()
: sequence.Peek());
}
public static T TryPeek <T>(this ISequenceView <T> sequence, T returnIfEmpty)
{
if (sequence == null)
{
throw new ArgumentNullException(nameof(sequence));
}
return(sequence.Count == 0
? returnIfEmpty
: sequence.Peek());
}
public static bool TryPeek <T>(this ISequenceView <T> sequence, out T next)
{
if (sequence == null)
{
throw new ArgumentNullException(nameof(sequence));
}
if (sequence.Count == 0)
{
next = default;
return(false);
}
next = sequence.Peek();
return(true);
}
public static bool TryOldest <T>(this ISequenceView <T> sequence, out T oldest)
{
if (sequence == null)
{
throw new ArgumentNullException(nameof(sequence));
}
if (sequence.Count == 0)
{
oldest = default;
return(false);
}
oldest = sequence.IsStack
? sequence.Poke()
: sequence.Peek();
return(true);
}
