git.iko.soy/streamly
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streamly/src/Streamly/Internal/Data/Tuple/Strict.hs
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1-- |
2-- Module : Streamly.Internal.Data.Tuple.Strict
3-- Copyright : (c) 2019 Composewell Technologies
4-- (c) 2013 Gabriel Gonzalez
5-- License : BSD3
6-- Maintainer : streamly@composewell.com
7-- Stability : experimental
8-- Portability : GHC
9--
10-- | Strict data types to be used as accumulator for strict left folds and
11-- scans. For more comprehensive strict data types see
12-- https://hackage.haskell.org/package/strict-base-types . The names have been
13-- suffixed by a prime so that programmers can easily distinguish the strict
14-- versions from the lazy ones.
15--
16-- One major advantage of strict data structures as accumulators in folds and
17-- scans is that it helps the compiler optimize the code much better by
18-- unboxing. In a big tight loop the difference could be huge.
19--
20module Streamly.Internal.Data.Tuple.Strict
21 (
22 Tuple' (..)
23 , Tuple3' (..)
24 , Tuple4' (..)
25 )
26where
28-- | A strict '(,)'
29data Tuple' a b = Tuple' !a !b deriving Show
31-- | A strict '(,,)'
32data Tuple3' a b c = Tuple3' !a !b !c deriving Show
34-- | A strict '(,,,)'
35data Tuple4' a b c d = Tuple4' !a !b !c !d deriving Show