Sophie: haskell-HXT-7.1-2mdv2007.1 i586

haskell-HXT-7.1-2mdv2007.1.i586.rpm

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>Control.Monad.MonadStateIO</TITLE
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>hxt-7.1: </TD
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>Contents</A
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>Index</A
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><FONT SIZE="6"
>Control.Monad.MonadStateIO</FONT
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><TD CLASS="s15"
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><TD CLASS="section1"
>Description</TD
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><TD CLASS="doc"
><P
>general usefull state monad for a local state and IO
</P
><P
>Version : $Id: MonadStateIO.hs,v 1.1 2004<EM
>09</EM
>02 19:11:55 hxml Exp $
</P
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><TD CLASS="section1"
>Synopsis</TD
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><TD CLASS="decl"
><SPAN CLASS="keyword"
>newtype</SPAN
> <A HREF="#t%3AStateIO"
>StateIO</A
> state res = <A HREF="#v%3ASTIO"
>STIO</A
> {<TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="recfield"
><A HREF="#v%3Atrans"
>trans</A
> :: (state -&gt; IO (res, state))</TD
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></TABLE
>}</TD
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><TR
><TD CLASS="s8"
></TD
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><TR
><TD CLASS="decl"
><A HREF="#v%3Aio"
>io</A
> :: IO a -&gt; <A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AtrcState"
>trcState</A
> :: (state -&gt; String) -&gt; <A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state ()</TD
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><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AchangeState"
>changeState</A
> :: (state -&gt; state) -&gt; <A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state state</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AsetState"
>setState</A
> :: state -&gt; <A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state state</TD
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><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AgetState"
>getState</A
> :: <A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state state</TD
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><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3Arun"
>run</A
> :: state -&gt; <A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state res -&gt; IO res</TD
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><TD CLASS="s15"
></TD
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><TR
><TD CLASS="section1"
>Documentation</TD
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><TD CLASS="s15"
></TD
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><TD CLASS="decl"
><SPAN CLASS="keyword"
>newtype</SPAN
> <A NAME="t%3AStateIO"
></A
><B
>StateIO</B
> state res</TD
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><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
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><TD CLASS="section4"
>Constructors</TD
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><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="5" CELLPADDING="0"
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><TD CLASS="arg"
><A NAME="v%3ASTIO"
></A
><B
>STIO</B
></TD
><TD CLASS="rdoc"
></TD
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><TD CLASS="body" COLSPAN="2"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
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><TD CLASS="arg"
><A NAME="v%3Atrans"
></A
><B
>trans</B
> :: (state -&gt; IO (res, state))</TD
><TD CLASS="rdoc"
></TD
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></TABLE
></TD
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><TD CLASS="section4"
><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:StateIO')" ALT="show/hide"
> Instances</TD
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><TD CLASS="body"
><DIV ID="i:StateIO" STYLE="display:block;"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
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><TD CLASS="decl"
>Monad (<A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state)</TD
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></TABLE
></DIV
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v%3Aio"
></A
><B
>io</B
> :: IO a -&gt; <A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state a</TD
></TR
><TR
><TD CLASS="doc"
>lift IO command to <TT
><A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
></TT
>
</TD
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><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v%3AtrcState"
></A
><B
>trcState</B
> :: (state -&gt; String) -&gt; <A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state ()</TD
></TR
><TR
><TD CLASS="doc"
>state inspection command: a &quot;show&quot;-like function is applied to the state
 and the result is written to stderr.
</TD
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><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v%3AchangeState"
></A
><B
>changeState</B
> :: (state -&gt; state) -&gt; <A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state state</TD
></TR
><TR
><TD CLASS="doc"
>change the state with a given function and return the new state
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v%3AsetState"
></A
><B
>setState</B
> :: state -&gt; <A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state state</TD
></TR
><TR
><TD CLASS="doc"
>set the state
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v%3AgetState"
></A
><B
>getState</B
> :: <A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state state</TD
></TR
><TR
><TD CLASS="doc"
>read the state
</TD
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><TR
><TD CLASS="s15"
></TD
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><TR
><TD CLASS="decl"
><A NAME="v%3Arun"
></A
><B
>run</B
> :: state -&gt; <A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
> state res -&gt; IO res</TD
></TR
><TR
><TD CLASS="doc"
>run a <TT
><A HREF="Control-Monad-MonadStateIO.html#t%3AStateIO"
>StateIO</A
></TT
> command with an initial state
</TD
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></TD
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>Produced by <A HREF="http://www.haskell.org/haddock/"
>Haddock</A
> version 0.8</TD
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