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BNF范式（巴科斯范式）到底是什么？ 看一个C语言公开课中，老师提到了程序语言的BNF范式，网上查找资料也不能清晰表诉到底它是个什么东东！
I love the syntax of railroad diagrams on json.org which are a graphical representation of the BNF language. I haven't found any tools that can produce results as eloquently. Can anyone identify th...
3 BNF (Backus-Naur Form), foi originalmente criada por John Backus e Peter Naur, é uma metassintaxe usada para expressar gramáticas livres de contexto. Com ela, é possível especificar quais sequências de símbolos constituem um programa sintaticamente válido em um determinado idioma.
Which dialect of BNF are you using? There are many, and they have different sets of rules. Is a parenthesis a metacharacter or a literal character? Maybe you should use LPAREN and RPAREN as token names for left parenthesis and right parenthesis. You casually mention EBNF one place; the rules for EBNF are very different from most other BNF-related systems (which is one reason why EBNF is not ...
The EBNF is the extended/newer version of BNF, so the problem becomes simpler: EBNF vs ABNF. I'm not an expert, but think that it should depend on a language, whose syntax you want to define.
Precedence of operators in BNF grammar Asked 10 years, 6 months ago Modified 10 years, 6 months ago Viewed 11k times
A complete English grammar expressed in BNF would surely be exceedingly complex. BNF is better suited to grammars of computer languages and formats. You might have a BNF description of JSON, for example, or of allowable syntax in C or Java.
Yes, it's ambiguous, but more importantly it doesn't match all valid inputs (unless I've misunderstood what your input language is). As I've understood you, you want to parse, say, a ^ b ^ c and have it produce a parse tree that grows to the left (like (a ^ b) ^ c) and a -> b -> c producing a right-leaning parse tree (like a -> (b -> c)). But your grammar doesn't match either - it always ...
A converter from other BNF-forms and ANTLR would at least reduce the need to manually adopting the differences in punctation and other minor aspects of BNF-syntax variants.
有谁能够大概推测出日本传奇短线交易高手BNF的操作手法？ 很多年前就听说此人了，一直对他的操作手法非常的感兴趣。 但是从来没有听说过它的具体的或者说稍微多一点的介绍。 媒体从来都是只盯着他那好似天方夜谭的成绩。 我… 显示全部 关注者 44