...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
T 
discrete 
continuous 
right_open 
left_open 
closed 
open 

Interval bounds 
dynamic 
dynamic 
static 
static 
static 
static 
Form 


asymmetric 
asymmetric 
symmetric 
symmetric 
Construct 










T construct(const P&, const P&, interval_bounds )

































The table above shows the availability of functions, that allow the construction of intervals. All interval constructin functins are of constant time and space complexity.
Construct 
Description 


Constructs an interval that contains exactly one element 

Contructs an interval with lower bound 
T construct(const P& lower, const P& upper, interval_bounds bounds = interval_bounds::right_open())

For dynamically bounded intervals this function constructs an interval with interval bounds specified by the third parameter. 



span<right_open_interval<int> >(2,1) == [1,2) // does NOT contain 2 hull<right_open_interval<int> >(2,1) == [1,3) // contains 2 construct<right_open_interval<int> >(2,1) == [) // is empty

static T right_open(const P&, const P&) static T left_open(const P&, const P&) static T closed(const P&, const P&) static T open(const P&, const P&)

For dynamically bounded intervals there are for static functions to construct intervals with the four interval bound types: discrete_interval<int> itv1 = discrete_interval<int>::closed(0,42); continuous_interval<double> itv2 = continuous_interval<double>::right_open(0.0, 1.0);

Using the interval default 


There is a library default, for all interval containers of the icl. The intension of the library default
is to minimize the need for parameter specification, when working
with icl class templates. We can
get the library default interval type as 
static T right_open(const P&, const P&) static T left_open(const P&, const P&) static T closed(const P&, const P&) static T open(const P&, const P&)

For template struct interval<int>::type itv1 = interval<int>::closed(0,42); interval<double>::type itv2 = interval<double>::right_open(0.0, 1.0); This works with the statically bounded intervals as well, with the restriction that for continuous domain types the matching function has to be used: #define BOOST_ICL_USE_STATIC_BOUNDED_INTERVALS . . . // library default is the statically bounded right_open_interval interval<int>::type itv1 = interval<int>::closed(0,42); //==[0,43) //ok, bounds are shifted interval<double>::type itv2 = interval<double>::right_open(0.0, 1.0); //ok. right_open matches interval<double>::type itv3 = interval<double>::closed(0.0, 1.0); //will NOT compile See also examples Dynamic intervals and Static intervals 
See also . . .
Example: Dynamically bounded intervals and the library default 
Example: Statically bounded intervals, changing the library default 
Back to section . . .