/// <summary>
/// Creates an iterator over the given range with the given step function,
/// with the specified direction.
/// </summary>
public LambdaRangeEnumerator([NotNull] LambdaRange <T> range, [NotNull] Func <T, T> step, bool ascending)
{
if (ascending && range.Comparer.Compare(range.Minimum, step(range.Minimum)) >= 0 ||
!ascending && range.Comparer.Compare(range.Maximum, step(range.Maximum)) <= 0)
{
throw new ArgumentException("step does nothing, or progresses the wrong way.");
}
_step = step;
if (ascending)
{
_includesStart = range.IncludesStart;
_includesEnd = range.IncludesEnd;
_start = range.Minimum;
_end = range.Maximum;
_comparer = range.Comparer;
}
else
{
_includesStart = range.IncludesEnd;
_includesEnd = range.IncludesStart;
_start = range.Maximum;
_end = range.Minimum;
_comparer = range.Comparer.Reverse();
}
}
public Range([NotNull] LambdaRange <T> range)
: this(range.Minimum, range.Maximum)
{
}
public NumericRange([NotNull] LambdaRange <T> range)
: base(range)
{
}
public DateRangeLister([NotNull] LambdaRange <DateTime> range, DateTimeUnit unit)
: this(range.Minimum, range.Maximum, unit)
{
}
/// <inheritdoc />
/// <summary>
/// Creates an ascending iterator over the given range with the given step function
/// </summary>
public LambdaRangeEnumerator([NotNull] LambdaRange <T> range, [NotNull] Func <T, T> step)
: this(range, step, true)
{
}
public LambdaRange([NotNull] LambdaRange <T> range)
: this(range.Minimum, range.Maximum, Comparer <T> .Default, true, true)
{
}
public static LambdaRangeEnumerator <char> StepChar([NotNull] this LambdaRange <char> range, int step)
{
return(range.Step(c => (char)(c + step)));
}
public ReadOnlyRange([NotNull] LambdaRange <T> range)
: this(new Range <T>(range.Minimum, range.Maximum))
{
}