Data.Array.Repa.Repr.Delayed

Documentation

data D

Delayed arrays are represented as functions from the index to element value.

Every time you index into a delayed array the element at that position is recomputed.

Instances

Source D a

Compute elements of a delayed array.

(Source D e, Shape DIM2, Elt e) => LoadRange D DIM2 e

Compute a range of elements in a rank-2 array.

(Source D e, Shape sh) => Load D sh e

Compute all elements in an array.

Structured D a b

(Source (I D) e, Shape sh, Load D sh e) => Load (I D) sh e

fromFunction :: sh -> (sh -> a) -> Array D sh a

O(1). Wrap a function as a delayed array.

toFunction :: (Shape sh, Source r1 a) => Array r1 sh a -> (sh, sh -> a)

O(1). Produce the extent of an array, and a function to retrieve an arbitrary element.

delay :: Shape sh => Source r e => Array r sh e -> Array D sh e

O(1). Delay an array. This wraps the internal representation to be a function from indices to elements, so consumers don't need to worry about what the previous representation was.