<!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 >IOEnv</TITLE ><LINK HREF="haddock.css" REL="stylesheet" TYPE="text/css" ><SCRIPT SRC="haddock-util.js" TYPE="text/javascript" ></SCRIPT ><SCRIPT TYPE="text/javascript" >window.onload = function () {setSynopsis("mini_IOEnv.html")};</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" >ghc-6.12.3: The GHC API</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" >IOEnv</FONT ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></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" >data</SPAN > <A HREF="#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" >module <A HREF="MonadUtils.html" >MonadUtils</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AfailM" >failM</A > :: <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AfailWithM" >failWithM</A > :: <A HREF="../base-4.2.0.2/Data-Char.html#t%3AString" >String</A > -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >data</SPAN > <A HREF="#t%3AIOEnvFailure" >IOEnvFailure</A > = <A HREF="#v%3AIOEnvFailure" >IOEnvFailure</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AgetEnv" >getEnv</A > :: <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env env</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AsetEnv" >setEnv</A > :: env' -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env' a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AupdEnv" >updEnv</A > :: (env -> env') -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env' a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3ArunIOEnv" >runIOEnv</A > :: env -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a -> <A HREF="../base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > a</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AunsafeInterleaveM" >unsafeInterleaveM</A > :: <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AtryM" >tryM</A > :: <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env r -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env (<A HREF="../base-4.2.0.2/Data-Either.html#t%3AEither" >Either</A > <A HREF="IOEnv.html#t%3AIOEnvFailure" >IOEnvFailure</A > r)</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AtryAllM" >tryAllM</A > :: <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env r -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env (<A HREF="../base-4.2.0.2/Data-Either.html#t%3AEither" >Either</A > <A HREF="../base-4.2.0.2/Control-Exception-Base.html#t%3ASomeException" >SomeException</A > r)</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AtryMostM" >tryMostM</A > :: <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env r -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env (<A HREF="../base-4.2.0.2/Data-Either.html#t%3AEither" >Either</A > <A HREF="../base-4.2.0.2/Control-Exception-Base.html#t%3ASomeException" >SomeException</A > r)</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AfixM" >fixM</A > :: (a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a) -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >data</SPAN > <A HREF="#t%3AIORef" >IORef</A > a</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AnewMutVar" >newMutVar</A > :: a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env (<A HREF="IOEnv.html#t%3AIORef" >IORef</A > a)</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AreadMutVar" >readMutVar</A > :: <A HREF="IOEnv.html#t%3AIORef" >IORef</A > a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AwriteMutVar" >writeMutVar</A > :: <A HREF="IOEnv.html#t%3AIORef" >IORef</A > a -> a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env <A HREF="../ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AupdMutVar" >updMutVar</A > :: <A HREF="IOEnv.html#t%3AIORef" >IORef</A > a -> (a -> a) -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env <A HREF="../ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AatomicUpdMutVar" >atomicUpdMutVar</A > :: <A HREF="IOEnv.html#t%3AIORef" >IORef</A > a -> (a -> (a, b)) -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env b</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AatomicUpdMutVar%27" >atomicUpdMutVar'</A > :: <A HREF="IOEnv.html#t%3AIORef" >IORef</A > a -> (a -> (a, b)) -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env b</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" >data</SPAN > <A NAME="t:IOEnv" ><A NAME="t%3AIOEnv" ></A ></A ><B >IOEnv</B > env a </TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="section4" ><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:IOEnv')" ALT="show/hide" > Instances</TD ></TR ><TR ><TD CLASS="body" ><DIV ID="i:IOEnv" STYLE="display:block;" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A HREF="../base-4.2.0.2/Control-Monad.html#t%3AMonad" >Monad</A > (<A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > m)</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="../base-4.2.0.2/Control-Monad.html#t%3AFunctor" >Functor</A > (<A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > m)</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="../base-4.2.0.2/Control-Monad.html#t%3AMonadPlus" >MonadPlus</A > <A HREF="../base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > => <A HREF="../base-4.2.0.2/Control-Monad.html#t%3AMonadPlus" >MonadPlus</A > (<A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env)</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="MonadUtils.html#t%3AApplicative" >Applicative</A > (<A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > m)</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="../template-haskell-2.4.0.1/Language-Haskell-TH-Syntax.html#t%3AQuasi" >Quasi</A > (<A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > (<A HREF="TcRnTypes.html#t%3AEnv" >Env</A > <A HREF="TcRnTypes.html#t%3ATcGblEnv" >TcGblEnv</A > <A HREF="TcRnTypes.html#t%3ATcLclEnv" >TcLclEnv</A >))</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="MonadUtils.html#t%3AMonadIO" >MonadIO</A > (<A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env)</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="UniqSupply.html#t%3AMonadUnique" >MonadUnique</A > (<A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > (<A HREF="TcRnTypes.html#t%3AEnv" >Env</A > gbl lcl))</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="HscTypes.html#t%3AMonadThings" >MonadThings</A > (<A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > (<A HREF="TcRnTypes.html#t%3AEnv" >Env</A > <A HREF="TcRnTypes.html#t%3ATcGblEnv" >TcGblEnv</A > <A HREF="TcRnTypes.html#t%3ATcLclEnv" >TcLclEnv</A >))</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="HscTypes.html#t%3AMonadThings" >MonadThings</A > (<A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > (<A HREF="TcRnTypes.html#t%3AEnv" >Env</A > DsGblEnv DsLclEnv))</TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" >module <A HREF="MonadUtils.html" >MonadUtils</A ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:failM" ><A NAME="v%3AfailM" ></A ></A ><B >failM</B > :: <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:failWithM" ><A NAME="v%3AfailWithM" ></A ></A ><B >failWithM</B > :: <A HREF="../base-4.2.0.2/Data-Char.html#t%3AString" >String</A > -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >data</SPAN > <A NAME="t:IOEnvFailure" ><A NAME="t%3AIOEnvFailure" ></A ></A ><B >IOEnvFailure</B > </TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="section4" >Constructors</TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="arg" ><A NAME="v:IOEnvFailure" ><A NAME="v%3AIOEnvFailure" ></A ></A ><B >IOEnvFailure</B ></TD ><TD CLASS="rdoc" ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="section4" ><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:IOEnvFailure')" ALT="show/hide" > Instances</TD ></TR ><TR ><TD CLASS="body" ><DIV ID="i:IOEnvFailure" STYLE="display:block;" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A HREF="../base-4.2.0.2/Text-Show.html#t%3AShow" >Show</A > <A HREF="IOEnv.html#t%3AIOEnvFailure" >IOEnvFailure</A ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="../base-4.2.0.2/Data-Typeable.html#t%3ATypeable" >Typeable</A > <A HREF="IOEnv.html#t%3AIOEnvFailure" >IOEnvFailure</A ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="Panic.html#t%3AException" >Exception</A > <A HREF="IOEnv.html#t%3AIOEnvFailure" >IOEnvFailure</A ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:getEnv" ><A NAME="v%3AgetEnv" ></A ></A ><B >getEnv</B > :: <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env env</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:setEnv" ><A NAME="v%3AsetEnv" ></A ></A ><B >setEnv</B > :: env' -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env' a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="doc" >Perform a computation with a different environment </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:updEnv" ><A NAME="v%3AupdEnv" ></A ></A ><B >updEnv</B > :: (env -> env') -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env' a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="doc" >Perform a computation with an altered environment </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:runIOEnv" ><A NAME="v%3ArunIOEnv" ></A ></A ><B >runIOEnv</B > :: env -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a -> <A HREF="../base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > a</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:unsafeInterleaveM" ><A NAME="v%3AunsafeInterleaveM" ></A ></A ><B >unsafeInterleaveM</B > :: <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:tryM" ><A NAME="v%3AtryM" ></A ></A ><B >tryM</B > :: <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env r -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env (<A HREF="../base-4.2.0.2/Data-Either.html#t%3AEither" >Either</A > <A HREF="IOEnv.html#t%3AIOEnvFailure" >IOEnvFailure</A > r)</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:tryAllM" ><A NAME="v%3AtryAllM" ></A ></A ><B >tryAllM</B > :: <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env r -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env (<A HREF="../base-4.2.0.2/Data-Either.html#t%3AEither" >Either</A > <A HREF="../base-4.2.0.2/Control-Exception-Base.html#t%3ASomeException" >SomeException</A > r)</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:tryMostM" ><A NAME="v%3AtryMostM" ></A ></A ><B >tryMostM</B > :: <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env r -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env (<A HREF="../base-4.2.0.2/Data-Either.html#t%3AEither" >Either</A > <A HREF="../base-4.2.0.2/Control-Exception-Base.html#t%3ASomeException" >SomeException</A > r)</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:fixM" ><A NAME="v%3AfixM" ></A ></A ><B >fixM</B > :: (a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a) -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >data</SPAN > <A NAME="t:IORef" ><A NAME="t%3AIORef" ></A ></A ><B >IORef</B > a </TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="ndoc" >A mutable variable in the <TT ><A HREF="../base-4.2.0.2/System-IO.html#t%3AIO" >IO</A ></TT > monad </TD ></TR ><TR ><TD CLASS="section4" ><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:IORef')" ALT="show/hide" > Instances</TD ></TR ><TR ><TD CLASS="body" ><DIV ID="i:IORef" STYLE="display:block;" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A HREF="../base-4.2.0.2/Data-Typeable.html#t%3ATypeable1" >Typeable1</A > <A HREF="IOEnv.html#t%3AIORef" >IORef</A ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="../base-4.2.0.2/Data-Eq.html#t%3AEq" >Eq</A > (<A HREF="IOEnv.html#t%3AIORef" >IORef</A > a)</TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:newMutVar" ><A NAME="v%3AnewMutVar" ></A ></A ><B >newMutVar</B > :: a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env (<A HREF="IOEnv.html#t%3AIORef" >IORef</A > a)</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:readMutVar" ><A NAME="v%3AreadMutVar" ></A ></A ><B >readMutVar</B > :: <A HREF="IOEnv.html#t%3AIORef" >IORef</A > a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env a</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:writeMutVar" ><A NAME="v%3AwriteMutVar" ></A ></A ><B >writeMutVar</B > :: <A HREF="IOEnv.html#t%3AIORef" >IORef</A > a -> a -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env <A HREF="../ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:updMutVar" ><A NAME="v%3AupdMutVar" ></A ></A ><B >updMutVar</B > :: <A HREF="IOEnv.html#t%3AIORef" >IORef</A > a -> (a -> a) -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env <A HREF="../ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:atomicUpdMutVar" ><A NAME="v%3AatomicUpdMutVar" ></A ></A ><B >atomicUpdMutVar</B > :: <A HREF="IOEnv.html#t%3AIORef" >IORef</A > a -> (a -> (a, b)) -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env b</TD ></TR ><TR ><TD CLASS="doc" >Atomically update the reference. Does not force the evaluation of the new variable contents. For strict update, use <TT ><A HREF="IOEnv.html#v%3AatomicUpdMutVar%27" >atomicUpdMutVar'</A ></TT >. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:atomicUpdMutVar'" ><A NAME="v%3AatomicUpdMutVar%27" ></A ></A ><B >atomicUpdMutVar'</B > :: <A HREF="IOEnv.html#t%3AIORef" >IORef</A > a -> (a -> (a, b)) -> <A HREF="IOEnv.html#t%3AIOEnv" >IOEnv</A > env b</TD ></TR ><TR ><TD CLASS="doc" >Strict variant of <TT ><A HREF="IOEnv.html#v%3AatomicUpdMutVar" >atomicUpdMutVar</A ></TT >. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="botbar" >Produced by <A HREF="http://www.haskell.org/haddock/" >Haddock</A > version 2.6.1</TD ></TR ></TABLE ></BODY ></HTML >