/usr/web/sources/contrib/fernan/nhc98/docs/libs/IOExtras.html

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<center><h1>The NHC.IOExtras library in nhc98</h1></center>

<hr>
This document sketches the IOExtras library in nhc98.  It is loosely
based on the non-standard IOExts library in ghc.

<hr>
<h3>The NHC.IOExtras library</h3>
<pre>
module NHC.IOExtras
  ( fixIO		-- :: (a-&gt;IO a) -&gt; IO a
  , unsafePerformIO	-- :: IO a -&gt; a

  , IORef		-- data IORef a = &lt;abstract&gt;
    -- instance Eq (IORef a)
  , newIORef		-- :: a -&gt; IO (IORef a)
  , readIORef		-- :: IORef a -&gt; IO a
  , writeIORef		-- :: IORef a -&gt; a -&gt; IO ()

  , module Ix		-- re-export Ix for the benefit of IOArrays
  , IOArray		-- data IOArray ix elt -- mutable arrays
  , newIOArray		-- :: Ix ix =&gt; (ix,ix) -&gt; elt -&gt; IO (IOArray ix elt)
  , boundsIOArray	-- :: Ix ix =&gt; IOArray ix elt -&gt; (ix, ix)
  , readIOArray		-- :: Ix ix =&gt; IOArray ix elt -&gt; ix -&gt; IO elt
  , writeIOArray	-- :: Ix ix =&gt; IOArray ix elt -&gt; ix -&gt; elt -&gt; IO ()
  , freezeIOArray	-- :: Ix ix =&gt; IOArray ix elt -&gt; IO (Array ix elt)
    -- instance Eq (IOArray ix elt)

  , performGC		-- :: IO ()
  , trace		-- :: String -&gt; a -&gt; a
  , unsafePtrEq		-- :: a -&gt; a -&gt; Bool
  ) where
</pre>

<hr>
<p>
The latest updates to these pages are available on the WWW from
<a href="http://www.cs.york.ac.uk/fp/nhc98/">
<tt>http://www.cs.york.ac.uk/fp/nhc98/</tt></a>

<p>
2001.11.27<br>
<a href="http://www.cs.york.ac.uk/fp/">
York Functional Programming Group</a><br>

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