<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!--Rendered using the Haskell Html Library v0.2--> <HTML ><HEAD ><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8" ><TITLE >Control.Arrow.ArrowIO</TITLE ><LINK HREF="haddock.css" REL="stylesheet" TYPE="text/css" ><SCRIPT SRC="haddock.js" TYPE="text/javascript" ></SCRIPT ></HEAD ><BODY ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="topbar" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD ><IMG SRC="haskell_icon.gif" WIDTH="16" HEIGHT="16" ALT=" " ></TD ><TD CLASS="title" >hxt-7.1: </TD ><TD CLASS="topbut" ><A HREF="index.html" >Contents</A ></TD ><TD CLASS="topbut" ><A HREF="doc-index.html" >Index</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="modulebar" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD ><FONT SIZE="6" >Control.Arrow.ArrowIO</FONT ></TD ><TD ALIGN="right" ><TABLE CLASS="narrow" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="infohead" >Portability</TD ><TD CLASS="infoval" >portable</TD ></TR ><TR ><TD CLASS="infohead" >Stability</TD ><TD CLASS="infoval" >experimental</TD ></TR ><TR ><TD CLASS="infohead" >Maintainer</TD ><TD CLASS="infoval" >Uwe Schmidt (uwe\@fh-wedel.de)</TD ></TR ></TABLE ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="section1" >Description</TD ></TR ><TR ><TD CLASS="doc" ><P >Version : $Id: ArrowIO.hs,v 1.6 2005<EM >09</EM >02 17:09:39 hxml Exp $ </P ><P >Lifting of IO actions to arrows </P ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="section1" >Synopsis</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >class</SPAN > Arrow a => <A HREF="#t%3AArrowIO" >ArrowIO</A > a <SPAN CLASS="keyword" >where</SPAN ></TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A HREF="#v%3AarrIO" >arrIO</A > :: (b -> IO c) -> a b c</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AarrIO0" >arrIO0</A > :: IO c -> a b c</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AarrIO2" >arrIO2</A > :: (b1 -> b2 -> IO c) -> a (b1, b2) c</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AarrIO3" >arrIO3</A > :: (b1 -> b2 -> b3 -> IO c) -> a (b1, (b2, b3)) c</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AarrIO4" >arrIO4</A > :: (b1 -> b2 -> b3 -> b4 -> IO c) -> a (b1, (b2, (b3, b4))) c</TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >class</SPAN > (Arrow a, <A HREF="Control-Arrow-ArrowIO.html#t%3AArrowIO" >ArrowIO</A > a) => <A HREF="#t%3AArrowIOIf" >ArrowIOIf</A > a <SPAN CLASS="keyword" >where</SPAN ></TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A HREF="#v%3AisIOA" >isIOA</A > :: (b -> IO Bool) -> a b b</TD ></TR ></TABLE ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="section1" >Documentation</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >class</SPAN > Arrow a => <A NAME="t%3AArrowIO" ></A ><B >ArrowIO</B > a <SPAN CLASS="keyword" >where</SPAN ></TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="ndoc" >the interface for converting an IO action into an arrow </TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="section4" >Methods</TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A NAME="v%3AarrIO" ></A ><B >arrIO</B > :: (b -> IO c) -> a b c</TD ></TR ><TR ><TD CLASS="doc" >construct an arrow from an IO action </TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v%3AarrIO0" ></A ><B >arrIO0</B > :: IO c -> a b c</TD ></TR ><TR ><TD CLASS="doc" >construct an arrow from an IO action without any parameter </TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v%3AarrIO2" ></A ><B >arrIO2</B > :: (b1 -> b2 -> IO c) -> a (b1, b2) c</TD ></TR ><TR ><TD CLASS="doc" >construction of a 2 argument arrow from a binary IO action | | example: <TT > a1 &&& a2 >>> arr2 f </TT > </TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v%3AarrIO3" ></A ><B >arrIO3</B > :: (b1 -> b2 -> b3 -> IO c) -> a (b1, (b2, b3)) c</TD ></TR ><TR ><TD CLASS="doc" >construction of a 3 argument arrow from a 3-ary IO action | | example: <TT > a1 &&& a2 &&& a3 >>> arr3 f </TT > </TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v%3AarrIO4" ></A ><B >arrIO4</B > :: (b1 -> b2 -> b3 -> b4 -> IO c) -> a (b1, (b2, (b3, b4))) c</TD ></TR ><TR ><TD CLASS="doc" >construction of a 4 argument arrow from a 4-ary IO action | | example: <TT > a1 &&& a2 &&& a3 &&& a4 >>> arr4 f </TT > </TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="section4" ><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:ArrowIO')" ALT="show/hide" > Instances</TD ></TR ><TR ><TD CLASS="body" ><DIV ID="i:ArrowIO" STYLE="display:block;" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A HREF="Control-Arrow-ArrowIO.html#t%3AArrowIO" >ArrowIO</A > <A HREF="Control-Arrow-IOListArrow.html#t%3AIOLA" >IOLA</A ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="Control-Arrow-ArrowIO.html#t%3AArrowIO" >ArrowIO</A > (<A HREF="Control-Arrow-IOStateListArrow.html#t%3AIOSLA" >IOSLA</A > s)</TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >class</SPAN > (Arrow a, <A HREF="Control-Arrow-ArrowIO.html#t%3AArrowIO" >ArrowIO</A > a) => <A NAME="t%3AArrowIOIf" ></A ><B >ArrowIOIf</B > a <SPAN CLASS="keyword" >where</SPAN ></TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="ndoc" >the interface for converting an IO predicate into a list arrow </TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="section4" >Methods</TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A NAME="v%3AisIOA" ></A ><B >isIOA</B > :: (b -> IO Bool) -> a b b</TD ></TR ><TR ><TD CLASS="doc" ><P >builds an arrow from an IO predicate </P ><P >if the predicate holds, the single list containing the input is returned, else the empty list, similar to <TT ><A HREF="Control-Arrow-ArrowList.html#v%3AisA" >isA</A ></TT > </P ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="section4" ><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:ArrowIOIf')" ALT="show/hide" > Instances</TD ></TR ><TR ><TD CLASS="body" ><DIV ID="i:ArrowIOIf" STYLE="display:block;" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A HREF="Control-Arrow-ArrowIO.html#t%3AArrowIOIf" >ArrowIOIf</A > <A HREF="Control-Arrow-IOListArrow.html#t%3AIOLA" >IOLA</A ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="Control-Arrow-ArrowIO.html#t%3AArrowIOIf" >ArrowIOIf</A > (<A HREF="Control-Arrow-IOStateListArrow.html#t%3AIOSLA" >IOSLA</A > s)</TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="botbar" >Produced by <A HREF="http://www.haskell.org/haddock/" >Haddock</A > version 0.8</TD ></TR ></TABLE ></BODY ></HTML >
