Interval

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The concept Interval describes the requirements for the template argument Interval of a Interval_skip_list<Interval>.

The concept does not specify, whether the interval is open or closed. It is up to the implementer of a model for this concept to define that.

Interval in;
	default constructor.

Interval::Value
	The type of the lower and upper bound of the interval.

Value	in.inf () const	returns the lower bound.
Value	in.sup () const	returns the upper bound.

bool	in.contains ( Value v) const	returns true, iff in contains v.

bool	in.contains_interval ( Value i, Value s) const
		returns true, iff in contains (i,s).

bool	in == I const	Equality test.

bool	in != I const	Unequality test.