File: Prec2Expr.in

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fmap unparse $ expr (lexer "a+b+c+d") :: Maybe String
fmap unparse $ expr (lexer "a+b*c+d") :: Maybe String
fmap unparse $ expr (lexer "a+b*c*d") :: Maybe String
fmap unparse $ expr (lexer "a+b+-c+d") :: Maybe String
fmap unparse $ expr (lexer "a+-b*c+d") :: Maybe String
fmap unparse $ expr (lexer "a=b") :: Maybe String
fmap unparse $ expr (lexer "a=b=c") :: Maybe String