Popularity
2.8
Declining
Activity
0.0
Stable
3
1
2

Monthly Downloads: 4
Programming language: Haskell
License: BSD 3-clause "New" or "Revised" License
Tags: Data    
Latest version: v0.0.1

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README

HSet

A simple implementation of heterogeneous sets in Haskell, assuming they implement Typeable:

{-# LANGUAGE
    DeriveDataTypeable
  , ScopedTypeVariables
  #-}

import Data.Typeable
import Data.HSet.Mutable as HSet
import Control.Monad.ST


data Foo = Foo
  { foo1 :: Int
  , foo2 :: Int
  } deriving (Typeable)

data Bar = Bar
  { bar1 :: Double
  } deriving (Typeable)


mySet :: ST s (HSet s)
mySet = do
  xs <- HSet.new
  (fooKey :: HKey Foo) <- HSet.insert (Foo 1 2) xs
  (barKey :: HKey Bar) <- HSet.insert (Bar 3.45) xs

You can then do lookups and deletions with the fooKey and barKey mutable references.