8.2.10 Set comparisons

bool contains(const T& v) const; 
bool contains(const triplex<T>& o) const; 
bool overlaps(const triplex<T>& o) const;

These functions make set assertions by comparison to an other or value.

contains(const T&)

Determines whether the given value is contained in the current triplex.

contains(const triplex<T>&)

Determines whether the given triplex is fully inside and contained in the current triplex.

overlaps(const triplex<T>&)

Determines whether the given triplex overlaps with the current triplex but is not fully contained in the latter.