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Module 

Header 
/Engine/Source/Runtime/Core/Public/Math/Range.h 
Include 
#include "Math/Range.h" 
template<typename ElementType>
class TRange
Template for ranges.
This class is not intended for interval arithmetic (see TInterval for that). A range represents a contiguous set of elements that only stores the set's lower and upper bound values (aka. endpoints) for storage efficiency. Bound values may be exclusive (the value is not part of the range), inclusive (the value is part of the range) or open (there is no limit on the values).
The template's primary focus is on continuous ranges, but it can be used for the representation of discrete ranges as well. The element type of discrete ranges has a welldefined stepping, such as an integer or a date, that separates the neighboring elements. This is in contrast with continuous ranges in which the step sizes, such as floats or time spans, are not of interest, and other elements may be found between any two elements (although, in practice, all ranges are discrete due to the limited precision of numerical values in computers).
When working with ranges, the user of this template is responsible for correctly interpreting the range endpoints. Certain semantics will be different depending on whether the range is interpreted in a continuous or discrete domain.
Iteration of a discrete range [A, B) includes the elements A to B1. The elements of continuous ranges are generally not meant to be iterated. It is also important to consider the equivalence of different representations of discrete ranges. For example, the ranges [2, 6), (1, 5] and [2, 5] are equivalent in discrete domains, but different in continuous ones. In order to keep this class simple, we have not included canonicalization functions or auxiliary template parameters, such as unit and min/max domain elements. For ease of use in most common use cases, it is recommended to limit all operations to canonical ranges of the form [A, B) in which the lower bound is included and the upper bound is excluded from the range.
Name  Description  


TRange() 
Default constructor (no initialization). 

TRange 
Create a range with a single element. The created range is of the form [A, A]. 

TRange 
Create and initializes a new range with the given lower and upper bounds. 

TRange ( 
Create and initializes a new range with the given lower and upper bounds. 
Name  Description  


Adjoins ( 
Check whether this range adjoins to another. 


All() 
Create an unbounded (open) range that contains all elements of the domain. 


AtLeast ( 
Create a leftbounded range that contains all elements greater than or equal to the specified value. 


AtMost ( 
Create a rightbounded range that contains all elements less than or equal to the specified value. 


Conjoins 
Check whether this range conjoins the two given ranges. 


Contains ( 
Check whether this range contains another range. 


Contains ( 
Check whether this range contains the specified element. 


Contiguous ( 
Check if this range is contiguous with another range. 


Difference 
Calculate the difference between two ranges, i.e. X  Y. 


Empty() 
Return an empty range. 


Exclusive ( 
Create a range that excludes the given minimum and maximum values. 


GetLowerBound() 
Get the range's lower bound. 


ElementValue... 
GetLowerBoundValue() 
Get the value of the lower bound. 

GetUpperBound() 
Get the range's upper bound. 


ElementValue... 
GetUpperBoundValue() 
Get the value of the upper bound. 

GreaterThan ( 
Create a leftbounded range that contains all elements greater than the specified value. 


HasLowerBound() 
Check whether the range has a lower bound. 


HasUpperBound() 
Check whether the range has an upper bound. 


Hull 
Compute the hull of two ranges. The hull is the smallest range that contains both ranges. 


Hull 
Compute the hull of many ranges. 


Inclusive ( 
Create a range that includes the given minimum and maximum values. 


Intersection 
Compute the intersection of two ranges. 


Intersection 
Compute the intersection of many ranges. 


IsDegenerate() 
Check whether this range is degenerate. 


IsEmpty() 
Check whether this range is empty. 


LessThan ( 
Create a rightbounded range that contains all elements less than the specified value. 


Overlaps ( 
Check whether this range overlaps with another. 


SetLowerBound ( 
Assign the new lower bound for this range 


SetLowerBoundValue ( 
Assign the new lower bound value for this range. 


SetUpperBound ( 
Assign the new upper bound for this range 


SetUpperBoundValue ( 
Assign the new upper bound value for this range. 


DifferenceTy... 
Size() 
Compute the size (diameter, length, width) of this range. 

Split ( 
Split the range into two ranges at the specified element. 


Union 
Return the union of two contiguous ranges. 
Name  Description  


operator!= ( 
Compare this range with the specified range for inequality. 


operator== ( 
Compare this range with the specified range for equality. 
Name 
Description 

BoundsType 

ElementValueOrConstRef 
RangeBound