mkoneof(1) [debian man page]

MkOneOf(1)							   User Commands							MkOneOf(1)

NAME

       MkOneOf - a helper program to use with DtdToHaskell

SYNOPSIS

       MkOneOf n [m]

DESCRIPTION

       DtdToHaskell translates XML DTD into equivalent Haskell types.  When there is a choice between different tags, DtdToHaskell uses types like
       OneOf2, OneOf3, OneOf4, etc.  The module Text.XML.HaXml.OneOfN currently defines these types up	OneOf20.   If  your  DTD  requires  larger
       choices, you can use this program to generate them.

       MkOneOf takes an integer N or an integer range N M and writes to the standard output a Haskell module with respectively the datatype OneOfN
       or the datatypes OneOfN up to and including OneOfM.

EXAMPLES

       If we run "MkOneOf 1 2", the program will print
       module Text.XML.HaXml.OneOfN where

       import Text.XML.HaXml.Xml2Haskell

       data OneOf1 a
	   = OneOf1 a
	   deriving (Eq,Show)

       instance (XmlContent a)
	   => XmlContent (OneOf1 a)
	 where
	   fromElem cs =
	       (choice OneOf1
	       $ (    toElem (OneOf1 x) = toElem x

       ----
       data OneOf2 a b
	   = OneOf2 a | TwoOf2 b
	   deriving (Eq,Show)

       instance (XmlContent a,XmlContent b)
	   => XmlContent (OneOf2 a b)
	 where
	   fromElem cs =
	       (choice OneOf2 $ choice TwoOf2
	       $ (    toElem (OneOf2 x) = toElem x
	   toElem (TwoOf2 x) = toElem x

       ----

COPYRIGHT

       The HaXml library and tools were written by and are copyright to
	      Copyright (C) 1998 - 2006    Malcolm Wallace and Colin Runciman

       The library incorporates the module Text.ParserCombinators.HuttonMeijerWallace
	      Copyright (C) 1996	   Graham Hutton and Erik Meijer

       with modifications
	      Copyright (C) 1998 - 2000    Malcolm Wallace

       and may also use or incorporate the module Text.PrettyPrint.HughesPJ
	      Copyright (C) 1996 - 1997    John Hughes and Simon Peyton Jones

       The HaXml library is licensed under the terms of the GNU Lesser General Public Licence (LGPL), with the following special exception:

	      As a relaxation of clause 6 of the LGPL, the copyright holders of this library give permission to use, copy, link, modify, and  dis-
	      tribute, binary-only object-code versions of an executable linked with the Library, without requiring the supply of any mechanism to
	      modify or replace the Library and relink (clauses 6a, 6b, 6c, 6d, 6e), provided that all the other terms of clause  6  are  complied
	      with.

       The HaXml tools Xtract, Validate, DtdToHaskell, and MkOneOf, are licensed under the terms of the GNU General Public Licence (GPL).

       This  library and toolset is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Licences for more details.

SEE ALSO

       DtdToHaskell(1)

AUTHOR

       This contents of this manual page was copied from the HTML documentation and slightly edited by Arjan Oosting  <arjan@debian.org>  for  the
       Debian system (but may be used by others).

MkOneOf, version 1.17						   October 2007 							MkOneOf(1)