| Copyright | (c) Christoph Breitkopf 2014 |
|---|---|
| License | BSD-style |
| Maintainer | chbreitkopf@gmail.com |
| Stability | experimental |
| Portability | non-portable (MPTC with FD) |
| Safe Haskell | Safe |
| Language | Haskell98 |
Data.IntervalMap.Generic.Interval
Description
Type class for IntervalMap keys.
As there is no sensible default, no instances for prelude types are provided (E.g. you might want to have tuples as closed intervals in one case, and open in another).
Empty intervals, i.e. intervals where 'lowerBound >= upperBound' should be avoided
if possible. If you must use empty intervals, you need to provide implementations
for all operations, as the default implementations do not necessarily work correctly.
for example, the default implementation of inside returns True if the point
is equal to the lowerBound of a left-closed interval even if it is larger than
the upper bound.
- class Ord e => Interval i e | i -> e where
- genericEquals :: (Interval i e, Eq e) => i -> i -> Bool
- genericCompare :: (Interval i e, Ord e) => i -> i -> Ordering
Interval type
class Ord e => Interval i e | i -> e where Source
Intervals with endpoints of type e.
A minimal instance declaration for a closed interval needs only
to define lowerBound and upperBound.
Minimal complete definition
Methods
lowerBound :: i -> e Source
lower bound
upperBound :: i -> e Source
upper bound
leftClosed :: i -> Bool Source
Does the interval include its lower bound? Default is True for all values, i.e. closed intervals.
rightClosed :: i -> Bool Source
Does the interval include its upper bound bound? Default is True for all values, i.e. closed intervals.
before :: i -> i -> Bool Source
Interval strictly before another? True if the upper bound of the first interval is below the lower bound of the second.
after :: i -> i -> Bool Source
Interval strictly after another? Same as 'flip before'.
subsumes :: i -> i -> Bool Source
Does the first interval completely contain the second?
overlaps :: i -> i -> Bool Source
Do the two intervals overlap?
below :: e -> i -> Bool Source
Is a point strictly less than lower bound?
above :: e -> i -> Bool Source
Is a point strictly greater than upper bound?
inside :: e -> i -> Bool Source
Does the interval contain a given point?
Is the interval empty?
helper functions for declaring Eq and Ord instances
genericEquals :: (Interval i e, Eq e) => i -> i -> Bool Source
genericCompare :: (Interval i e, Ord e) => i -> i -> Ordering Source