6.3.8 Status functions

bool is_empty() const;
bool is_whole() const;
bool is_singleton() const;
bool is_okay() const;

These functions return the status of the current interval , is properly .

is_empty()

Whether the interval is empty i.e. .

is_whole()

Whether the interval spans the whole complex space .

is_singleton()

Whether the interval refers to a single complex number. .

is_okay()

Whether the interval is properly defined.