Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/prelude/PreludeText/Read_Char.hs

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Distributed under the MIT License.
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module Prelude(Read(..)) where

import Char(readLitChar)

instance Read Char where
    readsPrec p      = readParen False
    	    	    	    (\r -> [(c,t) | ('\'':s,t)<- lex r,
					    (c,"\'")  <- readLitChar s])

    readList = readParen False (\r -> [(l,t) | ('"':s, t) <- lex r,
					       (l,_)      <- readl s	])
	       where readl ('"':s)	= [("",s)]
		     readl ('\\':'&':s)	= readl s
		     readl s		= [(c:cs,u) | (c ,t) <- readLitChar s,
						      (cs,u) <- readl t	      ]

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