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ghc-MissingH-devel-1.1.0.3-2.fc14.x86_64.rpm

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>Data.Either.Utils</TITLE
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>MissingH-1.1.0.3: Large utility library</TD
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><A HREF="src/Data-Either-Utils.html"
>Source code</A
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>Contents</A
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>Index</A
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>Data.Either.Utils</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"
>provisional</TD
></TR
><TR
><TD CLASS="infohead"
>Maintainer</TD
><TD CLASS="infoval"
>John Goerzen &lt;jgoerzen@complete.org&gt; </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
>Utilities for working with the Either data type
</P
><P
>Copyright (c) 2004 John Goerzen, jgoerzen@complete.org
</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"
><A HREF="#v%3AmaybeToEither"
>maybeToEither</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/mtl-1.1.0.2/Control-Monad-Error-Class.html#t%3AMonadError"
>MonadError</A
> e m =&gt; e -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a -&gt; m a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AforceEither"
>forceEither</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> e =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Either.html#t%3AEither"
>Either</A
> e a -&gt; a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AforceEitherMsg"
>forceEitherMsg</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> e =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AString"
>String</A
> -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Either.html#t%3AEither"
>Either</A
> e a -&gt; a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AeitherToMonadError"
>eitherToMonadError</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/mtl-1.1.0.2/Control-Monad-Error-Class.html#t%3AMonadError"
>MonadError</A
> e m =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Either.html#t%3AEither"
>Either</A
> e a -&gt; m a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AfromLeft"
>fromLeft</A
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Either.html#t%3AEither"
>Either</A
> a b -&gt; a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AfromRight"
>fromRight</A
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Either.html#t%3AEither"
>Either</A
> a b -&gt; b</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AfromEither"
>fromEither</A
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Either.html#t%3AEither"
>Either</A
> a a -&gt; a</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="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:maybeToEither"
><A NAME="v%3AmaybeToEither"
></A
></A
><B
>maybeToEither</B
></TD
><TD CLASS="declbut"
><A HREF="src/Data-Either-Utils.html#maybeToEither"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="arg"
>:: <A HREF="/usr/share/doc/ghc/html/libraries/mtl-1.1.0.2/Control-Monad-Error-Class.html#t%3AMonadError"
>MonadError</A
> e m</TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="arg"
>=&gt; e</TD
><TD CLASS="rdoc"
>(Left e) will be returned if the Maybe value is Nothing
</TD
></TR
><TR
><TD CLASS="arg"
>-&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a</TD
><TD CLASS="rdoc"
>(Right a) will be returned if this is (Just a)
</TD
></TR
><TR
><TD CLASS="arg"
>-&gt; m a</TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="ndoc" COLSPAN="2"
><P
>Converts a Maybe value to an Either value, using the supplied parameter
as the Left value if the Maybe is Nothing.
</P
><P
>This function can be interpreted as:
</P
><PRE
>maybeToEither :: e -&gt; Maybe a -&gt; Either e a</PRE
><P
>Its definition is given as it is so that it can be used in the Error and related monads.
</P
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:forceEither"
><A NAME="v%3AforceEither"
></A
></A
><B
>forceEither</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> e =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Either.html#t%3AEither"
>Either</A
> e a -&gt; a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Either-Utils.html#forceEither"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Pulls a <A HREF="Right.html"
>Right</A
> value out of an Either value.  If the Either value is
Left, raises an exception with <A HREF="error.html"
>error</A
>. 
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:forceEitherMsg"
><A NAME="v%3AforceEitherMsg"
></A
></A
><B
>forceEitherMsg</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> e =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AString"
>String</A
> -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Either.html#t%3AEither"
>Either</A
> e a -&gt; a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Either-Utils.html#forceEitherMsg"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Like <TT
><A HREF="Data-Either-Utils.html#v%3AforceEither"
>forceEither</A
></TT
>, but can raise a specific message with the error. 
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:eitherToMonadError"
><A NAME="v%3AeitherToMonadError"
></A
></A
><B
>eitherToMonadError</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/mtl-1.1.0.2/Control-Monad-Error-Class.html#t%3AMonadError"
>MonadError</A
> e m =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Either.html#t%3AEither"
>Either</A
> e a -&gt; m a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Either-Utils.html#eitherToMonadError"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Takes an either and transforms it into something of the more generic
MonadError class. 
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:fromLeft"
><A NAME="v%3AfromLeft"
></A
></A
><B
>fromLeft</B
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Either.html#t%3AEither"
>Either</A
> a b -&gt; a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Either-Utils.html#fromLeft"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Take a Left to a value, crashes on a Right
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:fromRight"
><A NAME="v%3AfromRight"
></A
></A
><B
>fromRight</B
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Either.html#t%3AEither"
>Either</A
> a b -&gt; b</TD
><TD CLASS="declbut"
><A HREF="src/Data-Either-Utils.html#fromRight"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Take a Right to a value, crashes on a Left
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:fromEither"
><A NAME="v%3AfromEither"
></A
></A
><B
>fromEither</B
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Either.html#t%3AEither"
>Either</A
> a a -&gt; a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Either-Utils.html#fromEither"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Take an Either, and return the value inside it
</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
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