
Hi, is there anyone can tell me what does the ::= mean?And what does the code below mean? expr ::= expr addop term | term Thank you in advance!

google://BNF
2009/9/29 xu zhang
Hi, is there anyone can tell me what does the ::= mean? And what does the code below mean?
expr ::= expr addop term | term
Thank you in advance! _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
-- Eugene Kirpichov Web IR developer, market.yandex.ru

That expression below Is a part of a Grammar in BNF. It means that an expression is form by an expression, an add operation and a Term or simply just a Term...
-----Original Message-----
From: xu zhang
participants (3)
-
Eugene Kirpichov
-
Hector Guilarte
-
xu zhang