/usr/share/doc/hugs/users_guide/addenda.html

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><A
NAME="ADDENDA"
>5.2. Addenda to Haskell 98</A
></H1
><P
>These addenda describe extensions that have been standardized
across haskell implementations.</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="FFI"
>5.2.1. Foreign Function Interface</A
></H2
><P
>The Haskell Foreign Function Interface, as described in the
<A
HREF="http://www.cse.unsw.edu.au/~chak/haskell/ffi/"
TARGET="_top"
>FFI addendum</A
>
is implemented except for the following limitations:</P
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><P
>Only the <TT
CLASS="LITERAL"
>ccall</TT
>, <TT
CLASS="LITERAL"
>stdcall</TT
> and
<TT
CLASS="LITERAL"
>dotnet</TT
> calling conventions are supported.
All others are flagged as errors.</P
></LI
><LI
><P
><TT
CLASS="LITERAL"
>foreign export</TT
> is not implemented.</P
></LI
><LI
><P
><TT
CLASS="LITERAL"
>foreign import "wrapper"</TT
> is only implemented for the
x86, PowerPC and Sparc architectures and has been most thoroughly tested on
Windows and Linux using <B
CLASS="COMMAND"
>gcc</B
>.</P
></LI
></UL
><P
>Modules containing <TT
CLASS="LITERAL"
>foreign</TT
> declarations must be compiled
with <B
CLASS="COMMAND"
>ffihugs</B
> before use (see <A
HREF="ffihugs.html"
>Section 4.2</A
>).</P
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><H2
CLASS="SECT2"
><A
NAME="HIERARCHICAL-LIBRARIES"
>5.2.2. Hierarchical Namespace Extension</A
></H2
><P
>The
<A
HREF="http://www.haskell.org/hierarchical-modules/"
TARGET="_top"
>Haskell Hierarchical Namespace Extension</A
>
allows dots in module names, e.g. <TT
CLASS="LITERAL"
>System.IO.Error</TT
>,
creating a hierarchical module namespace.
Hugs has supported this since the December 2001 release.
When searching for the source file corresponding to a hierarchical name,
Hugs replaces the dots with slashes.</P
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hugs 98.200609.21-5.4 / usr / share / doc / hugs / users_guide / addenda.html
