Popularity
3.0
Declining
Activity
0.0
Stable
1
3
0

Monthly Downloads: 9
Programming language: Haskell
License: BSD 3-clause "New" or "Revised" License
Tags: Development     Fay    

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README

Fay Ref

This package works like Data.IORef, but in the Fay monad. It allows you to create mutable variables and update them from within Fay.

main :: Fay ()
main = do
  fr <- newFayRef (10 :: Int)
  readFayRef fr -- Should give 10.
  writeFayRef fr 20
  readFayRef fr -- Should give 20.
  modifyFayRef fr (*2)
  readFayRef fr -- Should give 40.
  -- The above was non-strict; here is the strict variant.
  modifyFayRef' fr (*2)
  readFayRef fr -- Should give 80.
  return ()

Usage

To use this with fay, cabal install the package which will put the source files in fay ~/.cabal/share/fay-ref-0.1.0.0/src. You can then compile with fay using

fay --package fay-ref MyFile.hs