From 30c8ac408cba49ca4f223252cd1cd3d68ce6ca00 Mon Sep 17 00:00:00 2001
From: Jed Barber <jjbarber@y7mail.com>
Date: Sat, 28 Jan 2017 21:36:53 +1100
Subject: Moved old but still interesting code

---
 src/Criteria.hs | 93 ---------------------------------------------------------
 1 file changed, 93 deletions(-)
 delete mode 100644 src/Criteria.hs

(limited to 'src')

diff --git a/src/Criteria.hs b/src/Criteria.hs
deleted file mode 100644
index 8ca19c8..0000000
--- a/src/Criteria.hs
+++ /dev/null
@@ -1,93 +0,0 @@
-module Criteria(
-    Criteria,
-    CTest,
-
-    evaluate,
-    matchID,
-    matchFromList,
-    many
-    ) where
-
-
-
-
---  this is a preference criteria checking method modeled after parsec
---  it looks nice, and it *does* work, but unfortunately it's far too slow
-
-
-
-
-import qualified Control.Monad as Con
-import qualified Data.List as List
-import qualified Data.Either.Unwrap as Either
-import qualified Candidate as Typ
-import qualified Preferences as Pref
-
-
-
-
-type Criteria = [CTest]
-type CTest = CList -> Either CError CList
-type CList = [Typ.CandidateID]
-type CError = String
-
-
-
-
-evaluate :: Typ.BelowLineBallot -> [Pref.Preference] -> Criteria -> Bool
-evaluate ballot preferences criteria =
-    let clist = prefsToCList ballot preferences
-        parsed = Con.foldM (flip id) clist criteria
-        result = Either.isRight parsed
-    in if (isValidInput ballot preferences)
-        then result
-        else False
-
-
-
-
-isValidInput :: Typ.BelowLineBallot -> [Pref.Preference] -> Bool
-isValidInput ballot preferences =
-    all (\(x,y) -> x > 0 && x <= length ballot
-                && y > 0 && y <= length ballot) preferences
-
-
-
-
-prefsToCList :: Typ.BelowLineBallot -> [Pref.Preference] -> CList
-prefsToCList ballot preferences =
-    let t0 = map (\(x,y) -> (ballot !! (x - 1), y)) preferences
-        t1 = List.sortBy (\x y -> compare (snd x) (snd y)) t0
-    in map fst t1
-
-
-
-
-matchID :: Typ.CandidateID -> CTest
-matchID candID = (\x ->
-    let r = (head x == candID)
-    in if (length x == 0 || not r)
-        then Left "Couldn't match candidate"
-        else Right (tail x))
-
-
-
-
-matchFromList :: [Typ.CandidateID] -> CTest
-matchFromList candList = (\x ->
-    let r = (head x) `elem` candList
-    in if (length x == 0 || not r)
-        then Left "Couldn't match candidate"
-        else Right (tail x))
-
-
-
-
-many :: CTest -> CTest
-many ct = (\x ->
-    let r = ct x
-    in if (Either.isRight r)
-        then many ct (Either.fromRight r)
-        else Right x)
-
-
-- 
cgit