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BNF Converter: Abstract syntax Generator
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Copyright (C) 2004 Author: Markus Forberg
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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module CFtoAbstract (cf2Abstract) where
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import Utils((+++),(++++))
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import List(intersperse)
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-- to produce a Haskell module
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cf2Abstract :: String -> CF -> String
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cf2Abstract name cf = unlines $
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("module "++name +++ "where\n") :
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"-- Haskell module generated by the BNF converter\n" :
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(map (prSpecialData cf) (specialCats cf) ++ map prData (cf2data cf))
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prData :: Data -> String
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"data" +++ cat +++ "=\n " ++
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concat (intersperse "\n | " (map prRule rules)) ++++
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" deriving (Eq,Ord,Show)\n"
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prRule (fun,cats) = unwords (fun:cats)
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prSpecialData :: CF -> Cat -> String
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prSpecialData cf cat =
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unwords ["newtype",cat,"=",cat,contentSpec cf cat,"deriving (Eq,Ord,Show)"]
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contentSpec :: CF -> Cat -> String
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contentSpec cf cat = if isPositionCat cf cat then "((Int,Int),String)" else "String"
b'\\ No newline at end of file'
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formats/haskell2/CFtoAbstract.hs
