<!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.Monad.Writer.Strict</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_Control-Monad-Writer-Strict.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" >mtl-1.1.0.2: Monad transformer library</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.Monad.Writer.Strict</FONT ></TD ><TD ALIGN="right" ><TABLE CLASS="narrow" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="infohead" >Portability</TD ><TD CLASS="infoval" >non-portable (multi-param classes, functional dependencies)</TD ></TR ><TR ><TD CLASS="infohead" >Stability</TD ><TD CLASS="infoval" >experimental</TD ></TR ><TR ><TD CLASS="infohead" >Maintainer</TD ><TD CLASS="infoval" >libraries@haskell.org</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 >Strict writer monads. </P ><P >Inspired by the paper /Functional Programming with Overloading and Higher-Order Polymorphism/, Mark P Jones (<A HREF="http://web.cecs.pdx.edu/~mpj/pubs/springschool.html" >http://web.cecs.pdx.edu/~mpj/pubs/springschool.html</A >) Advanced School of Functional Programming, 1995. </P ></TD ></TR ><TR ><TD CLASS="s15" ></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" >module <A HREF="Control-Monad-Writer-Class.html" >Control.Monad.Writer.Class</A ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >newtype</SPAN > <A NAME="t:Writer" ><A NAME="t%3AWriter" ></A ></A ><B >Writer</B > w a </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="5" CELLPADDING="0" ><TR ><TD CLASS="arg" ><A NAME="v:Writer" ><A NAME="v%3AWriter" ></A ></A ><B >Writer</B ></TD ><TD CLASS="rdoc" ></TD ></TR ><TR ><TD CLASS="body" COLSPAN="2" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="arg" ><A NAME="v:runWriter" ><A NAME="v%3ArunWriter" ></A ></A ><B >runWriter</B > :: (a, w)</TD ><TD CLASS="rdoc" ></TD ></TR ></TABLE ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="section4" ><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:Writer')" ALT="show/hide" > Instances</TD ></TR ><TR ><TD CLASS="body" ><DIV ID="i:Writer" STYLE="display:block;" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w => <A HREF="Control-Monad-Writer-Class.html#t%3AMonadWriter" >MonadWriter</A > w (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriter" >Writer</A > w)</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w => <A HREF="../base/Control-Monad.html#t%3AMonad" >Monad</A > (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriter" >Writer</A > w)</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="../base/Control-Monad.html#t%3AFunctor" >Functor</A > (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriter" >Writer</A > w)</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w => <A HREF="../base/Control-Monad-Fix.html#t%3AMonadFix" >MonadFix</A > (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriter" >Writer</A > w)</TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:execWriter" ><A NAME="v%3AexecWriter" ></A ></A ><B >execWriter</B > :: <A HREF="Control-Monad-Writer-Strict.html#t%3AWriter" >Writer</A > w a -> w</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:mapWriter" ><A NAME="v%3AmapWriter" ></A ></A ><B >mapWriter</B > :: ((a, w) -> (b, w')) -> <A HREF="Control-Monad-Writer-Strict.html#t%3AWriter" >Writer</A > w a -> <A HREF="Control-Monad-Writer-Strict.html#t%3AWriter" >Writer</A > w' b</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >newtype</SPAN > <A NAME="t:WriterT" ><A NAME="t%3AWriterT" ></A ></A ><B >WriterT</B > w m a </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="5" CELLPADDING="0" ><TR ><TD CLASS="arg" ><A NAME="v:WriterT" ><A NAME="v%3AWriterT" ></A ></A ><B >WriterT</B ></TD ><TD CLASS="rdoc" ></TD ></TR ><TR ><TD CLASS="body" COLSPAN="2" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="arg" ><A NAME="v:runWriterT" ><A NAME="v%3ArunWriterT" ></A ></A ><B >runWriterT</B > :: m (a, w)</TD ><TD CLASS="rdoc" ></TD ></TR ></TABLE ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="section4" ><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:WriterT')" ALT="show/hide" > Instances</TD ></TR ><TR ><TD CLASS="body" ><DIV ID="i:WriterT" STYLE="display:block;" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="decl" >(<A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w, <A HREF="../base/Control-Monad.html#t%3AMonad" >Monad</A > m) => <A HREF="Control-Monad-Writer-Class.html#t%3AMonadWriter" >MonadWriter</A > w (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w m)</TD ></TR ><TR ><TD CLASS="decl" >(<A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w, <A HREF="Control-Monad-State-Class.html#t%3AMonadState" >MonadState</A > s m) => <A HREF="Control-Monad-State-Class.html#t%3AMonadState" >MonadState</A > s (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w m)</TD ></TR ><TR ><TD CLASS="decl" >(<A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w, <A HREF="Control-Monad-Reader-Class.html#t%3AMonadReader" >MonadReader</A > r m) => <A HREF="Control-Monad-Reader-Class.html#t%3AMonadReader" >MonadReader</A > r (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w m)</TD ></TR ><TR ><TD CLASS="decl" >(<A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w, <A HREF="Control-Monad-Error-Class.html#t%3AMonadError" >MonadError</A > e m) => <A HREF="Control-Monad-Error-Class.html#t%3AMonadError" >MonadError</A > e (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w m)</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w => <A HREF="Control-Monad-Trans.html#t%3AMonadTrans" >MonadTrans</A > (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w)</TD ></TR ><TR ><TD CLASS="decl" >(<A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w, <A HREF="../base/Control-Monad.html#t%3AMonad" >Monad</A > m) => <A HREF="../base/Control-Monad.html#t%3AMonad" >Monad</A > (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w m)</TD ></TR ><TR ><TD CLASS="decl" ><A HREF="../base/Control-Monad.html#t%3AMonad" >Monad</A > m => <A HREF="../base/Control-Monad.html#t%3AFunctor" >Functor</A > (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w m)</TD ></TR ><TR ><TD CLASS="decl" >(<A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w, <A HREF="../base/Control-Monad-Fix.html#t%3AMonadFix" >MonadFix</A > m) => <A HREF="../base/Control-Monad-Fix.html#t%3AMonadFix" >MonadFix</A > (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w m)</TD ></TR ><TR ><TD CLASS="decl" >(<A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w, <A HREF="../base/Control-Monad.html#t%3AMonadPlus" >MonadPlus</A > m) => <A HREF="../base/Control-Monad.html#t%3AMonadPlus" >MonadPlus</A > (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w m)</TD ></TR ><TR ><TD CLASS="decl" >(<A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w, <A HREF="Control-Monad-Trans.html#t%3AMonadIO" >MonadIO</A > m) => <A HREF="Control-Monad-Trans.html#t%3AMonadIO" >MonadIO</A > (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w m)</TD ></TR ><TR ><TD CLASS="decl" >(<A HREF="../base/Data-Monoid.html#t%3AMonoid" >Monoid</A > w, <A HREF="Control-Monad-Cont-Class.html#t%3AMonadCont" >MonadCont</A > m) => <A HREF="Control-Monad-Cont-Class.html#t%3AMonadCont" >MonadCont</A > (<A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w m)</TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:execWriterT" ><A NAME="v%3AexecWriterT" ></A ></A ><B >execWriterT</B > :: <A HREF="../base/Control-Monad.html#t%3AMonad" >Monad</A > m => <A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w m a -> m w</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" ><A NAME="v:mapWriterT" ><A NAME="v%3AmapWriterT" ></A ></A ><B >mapWriterT</B > :: (m (a, w) -> n (b, w')) -> <A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w m a -> <A HREF="Control-Monad-Writer-Strict.html#t%3AWriterT" >WriterT</A > w' n b</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" >module <A HREF="../base/Control-Monad.html" >Control.Monad</A ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" >module <A HREF="../base/Control-Monad-Fix.html" >Control.Monad.Fix</A ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" >module <A HREF="Control-Monad-Trans.html" >Control.Monad.Trans</A ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="decl" >module <A HREF="../base/Data-Monoid.html" >Data.Monoid</A ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="botbar" >Produced by <A HREF="http://www.haskell.org/haddock/" >Haddock</A > version 2.4.2</TD ></TR ></TABLE ></BODY ></HTML >