Sophie: ghc-0:6.10.4-1mdv2010.0 i586

ghc-6.10.4-1mdv2010.0.i586.rpm

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>ghc-6.10.4: The GHC API</TD
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>Maybes</FONT
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><TD CLASS="section1"
>Synopsis</TD
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><TD CLASS="decl"
>module <A HREF="../base/Data-Maybe.html"
>Data.Maybe</A
></TD
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><TR
><TD CLASS="decl"
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><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A HREF="#t%3AMaybeErr"
>MaybeErr</A
> err val </TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="decl"
>= <A HREF="#v%3ASucceeded"
>Succeeded</A
> val</TD
></TR
><TR
><TD CLASS="decl"
>| <A HREF="#v%3AFailed"
>Failed</A
> err</TD
></TR
></TABLE
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AfailME"
>failME</A
> ::  err -&gt; <A HREF="Maybes.html#t%3AMaybeErr"
>MaybeErr</A
> err val</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AisSuccess"
>isSuccess</A
> ::  <A HREF="Maybes.html#t%3AMaybeErr"
>MaybeErr</A
> err val -&gt; <A HREF="../ghc-prim/GHC-Bool.html#t%3ABool"
>Bool</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AorElse"
>orElse</A
> ::  <A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a -&gt; a -&gt; a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AmapCatMaybes"
>mapCatMaybes</A
> ::  (a -&gt; <A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> b) -&gt; [a] -&gt; [b]</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AallMaybes"
>allMaybes</A
> ::  [<A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a] -&gt; <A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> [a]</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AfirstJust"
>firstJust</A
> ::  [<A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a] -&gt; <A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AexpectJust"
>expectJust</A
> ::  <A HREF="../base/Data-Char.html#t%3AString"
>String</A
> -&gt; <A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a -&gt; a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AmaybeToBool"
>maybeToBool</A
> ::  <A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a -&gt; <A HREF="../ghc-prim/GHC-Bool.html#t%3ABool"
>Bool</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>newtype</SPAN
>  <A HREF="#t%3AMaybeT"
>MaybeT</A
> m a = <A HREF="#v%3AMaybeT"
>MaybeT</A
> {<TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="recfield"
><A HREF="#v%3ArunMaybeT"
>runMaybeT</A
> :: m (<A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a)</TD
></TR
></TABLE
>}</TD
></TR
></TABLE
></TD
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><TR
><TD CLASS="section1"
>Documentation</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
>module <A HREF="../base/Data-Maybe.html"
>Data.Maybe</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A NAME="t:MaybeErr"
><A NAME="t%3AMaybeErr"
></A
></A
><B
>MaybeErr</B
> err val </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:Succeeded"
><A NAME="v%3ASucceeded"
></A
></A
><B
>Succeeded</B
> val</TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="arg"
><A NAME="v:Failed"
><A NAME="v%3AFailed"
></A
></A
><B
>Failed</B
> err</TD
><TD CLASS="rdoc"
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="section4"
><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:MaybeErr')" ALT="show/hide"
> Instances</TD
></TR
><TR
><TD CLASS="body"
><DIV ID="i:MaybeErr" STYLE="display:block;"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A HREF="../base/Control-Monad.html#t%3AMonad"
>Monad</A
> (<A HREF="Maybes.html#t%3AMaybeErr"
>MaybeErr</A
> err)</TD
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></TABLE
></DIV
></TD
></TR
></TABLE
></TD
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></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:failME"
><A NAME="v%3AfailME"
></A
></A
><B
>failME</B
> ::  err -&gt; <A HREF="Maybes.html#t%3AMaybeErr"
>MaybeErr</A
> err val</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:isSuccess"
><A NAME="v%3AisSuccess"
></A
></A
><B
>isSuccess</B
> ::  <A HREF="Maybes.html#t%3AMaybeErr"
>MaybeErr</A
> err val -&gt; <A HREF="../ghc-prim/GHC-Bool.html#t%3ABool"
>Bool</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:orElse"
><A NAME="v%3AorElse"
></A
></A
><B
>orElse</B
> ::  <A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a -&gt; a -&gt; a</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:mapCatMaybes"
><A NAME="v%3AmapCatMaybes"
></A
></A
><B
>mapCatMaybes</B
> ::  (a -&gt; <A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> b) -&gt; [a] -&gt; [b]</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:allMaybes"
><A NAME="v%3AallMaybes"
></A
></A
><B
>allMaybes</B
> ::  [<A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a] -&gt; <A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> [a]</TD
></TR
><TR
><TD CLASS="doc"
>Collects a list of <TT
>Justs</TT
> into a single <TT
>Just</TT
>, returning <TT
>Nothing</TT
> if
 there are any <TT
>Nothings</TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:firstJust"
><A NAME="v%3AfirstJust"
></A
></A
><B
>firstJust</B
> ::  [<A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a] -&gt; <A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a</TD
></TR
><TR
><TD CLASS="doc"
>Takes a list of <TT
>Maybes</TT
> and returns the first <TT
>Just</TT
> if there is one, or
 <TT
>Nothing</TT
> otherwise.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:expectJust"
><A NAME="v%3AexpectJust"
></A
></A
><B
>expectJust</B
> ::  <A HREF="../base/Data-Char.html#t%3AString"
>String</A
> -&gt; <A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a -&gt; a</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:maybeToBool"
><A NAME="v%3AmaybeToBool"
></A
></A
><B
>maybeToBool</B
> ::  <A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a -&gt; <A HREF="../ghc-prim/GHC-Bool.html#t%3ABool"
>Bool</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>newtype</SPAN
>  <A NAME="t:MaybeT"
><A NAME="t%3AMaybeT"
></A
></A
><B
>MaybeT</B
> 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:MaybeT"
><A NAME="v%3AMaybeT"
></A
></A
><B
>MaybeT</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:runMaybeT"
><A NAME="v%3ArunMaybeT"
></A
></A
><B
>runMaybeT</B
> :: m (<A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a)</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:MaybeT')" ALT="show/hide"
> Instances</TD
></TR
><TR
><TD CLASS="body"
><DIV ID="i:MaybeT" STYLE="display:block;"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A HREF="../base/Control-Monad.html#t%3AMonad"
>Monad</A
> m =&gt; <A HREF="../base/Control-Monad.html#t%3AMonad"
>Monad</A
> (<A HREF="Maybes.html#t%3AMaybeT"
>MaybeT</A
> m)</TD
></TR
><TR
><TD CLASS="decl"
><A HREF="../base/Control-Monad.html#t%3AFunctor"
>Functor</A
> m =&gt; <A HREF="../base/Control-Monad.html#t%3AFunctor"
>Functor</A
> (<A HREF="Maybes.html#t%3AMaybeT"
>MaybeT</A
> m)</TD
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