public static T TryPeek <T>(this IPop <T> c, T defaultValue)
{
bool isEmpty;
T value = c.TryPeek(out isEmpty);
return(isEmpty ? defaultValue : value);
}
public static bool TryPeek <T>(this IPop <T> c, out T value)
{
bool isEmpty;
value = c.TryPeek(out isEmpty);
return(!isEmpty);
}
public static T Peek <T>(this IPop <T> c)
{
bool isEmpty;
T next = c.TryPeek(out isEmpty);
if (isEmpty)
{
throw new InvalidOperationException("The {0} is empty".Localized(c.GetType().Name));
}
return(next);
}
public static T Peek <T>(this IPop <T> c)
{
bool isEmpty;
T next = c.TryPeek(out isEmpty);
if (isEmpty)
{
throw new EmptySequenceException("The {0} is empty".Localized(MemoizedTypeName.Get(c.GetType())));
}
return(next);
}
public static T TryPeek <T>(this IPop <T> c)
{
bool isEmpty;
return(c.TryPeek(out isEmpty));
}