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-- Lisp as used in the Alvey grammar
entrypoints Prog, Exp ;
Pro. Prog ::= [Exp] ;
App. Exp ::= "(" [Exp] ")" ;
At. Exp ::= Id ;
IdPlus. Exp ::= IdPl ;
IdStr. Exp ::= String ;
Plus. Exp ::= "+" ;
Minus. Exp ::= "-" ;
Num. Exp ::= Integer ;
token IdPl ('+' letter (letter | digit | '-' | '_')*) ;
token Id (letter (letter | digit | '-' | '_')*) ;
terminator Exp "" ;
comment ";;" ;
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