Documentation
class Ord a => Ix a whereSource
The Ix
class is used to map a contiguous subrange of values in
a type onto integers. It is used primarily for array indexing
(see the array package).
The first argument (l,u)
of each of these operations is a pair
specifying the lower and upper bounds of a contiguous subrange of values.
An implementation is entitled to assume the following laws about these operations:
The list of values in the subrange defined by a bounding pair.
index :: (a, a) -> a -> IntSource
The position of a subscript in the subrange.
inRange :: (a, a) -> a -> BoolSource
Returns True
the given subscript lies in the range defined
the bounding pair.
rangeSize :: (a, a) -> IntSource
The size of the subrange defined by a bounding pair.