Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/tests/nofib/real/ebnf2ps/AbstractSyntax.hs

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module AbstractSyntax (Production (..)) where
-- Copyright 1994 by Peter Thiemann

data Production
	= ProdFile [Production]
	| ProdProduction String [String] Production	    -- optional print name
	| ProdTerm [Production]				    -- an alternative of terms
	| ProdFactor [Production]			    -- a sequence of factors
	| ProdNonterminal String
	| ProdTerminal String
	| ProdOption Production
	| ProdRepeat Production
	| ProdRepeatWithAtom Production Production
	| ProdRepeat1 Production
	| ProdPlus					    -- a helper
	| ProdSlash Production				    -- another helper
	deriving Eq


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