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

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>Unsafe.Coerce</TITLE
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>base-4.1.0.0: Basic libraries</TD
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>Contents</A
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>Unsafe.Coerce</FONT
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>Portability</TD
><TD CLASS="infoval"
>portable</TD
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>Stability</TD
><TD CLASS="infoval"
>experimental</TD
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>Maintainer</TD
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>libraries@haskell.org</TD
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>Description</TD
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>The highly unsafe primitive <TT
><A HREF="Unsafe-Coerce.html#v%3AunsafeCoerce"
>unsafeCoerce</A
></TT
> converts a value from any
 type to any other type.  Needless to say, if you use this function,
 it is your responsibility to ensure that the old and new types have
 identical internal representations, in order to prevent runtime corruption.
</P
><P
>The types for which <TT
><A HREF="Unsafe-Coerce.html#v%3AunsafeCoerce"
>unsafeCoerce</A
></TT
> is representation-safe may differ
 from compiler to compiler (and version to version).
</P
><UL
><LI
> Documentation for correct usage in GHC will be found under
     'unsafeCoerce#' in GHC.Base (around which <TT
><A HREF="Unsafe-Coerce.html#v%3AunsafeCoerce"
>unsafeCoerce</A
></TT
> is just a
     trivial wrapper).
</LI
><LI
> In nhc98, the only representation-safe coercions are between Enum
     types with the same range (e.g. Int, Int32, Char, Word32),
     or between a newtype and the type that it wraps.
</LI
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>Documentation</TD
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><TD CLASS="decl"
><A NAME="v:unsafeCoerce"
><A NAME="v%3AunsafeCoerce"
></A
></A
><B
>unsafeCoerce</B
> ::  a -&gt; b</TD
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