I\'ve looked at the Bison help and have written this, but I\'m not sure it\'s completely correct. Also i need an yylex() that handle Lexical Analyzer (It should be Flex tool). I know some basic things
I am looking for an unambiguous grammar for arithmetic expressions with no redundant parentheses. For example, parentheses are redundant in id+(id*id), but not in (开发者_如何学JAVAid+id)*id.You can e
I\'m designing a context-free grammar to generate this language:开发者_开发问答 { w in {a,b}* | w is of the form uvu^R, where u and v are any strings in {a,b}* }
Find a context-free grammar (CFG) for the language L of all words such that each terminal in a word occurs even number of times over a possibly large alphabet Σ
How do I remove left recursion on the following rule: S -> aSAbb | aA I understand how to perfor开发者_如何学Gom it on S -> SA | A
I am studying for my finals & I was reading context free grammars article from wikipedia and came across following example.
It seems that recursive-descent parsers are not only the simplest to explain, but also the simplest to design and maintain. They aren\'t limited to LALR(1) grammars, and the code itself can be underst
I can\'t find any applet or program online to convert a context free language into a push down automata... any help would be gre开发者_StackOverflow中文版atly appreciated.It is very easy to do by hand
This may sound strange, but it is used in a parser, I want to be able to parse something of the form foo[bar]
A = {0^a 1^b 2^c | a &开发者_运维技巧lt; b < c} I need to show that A is not context-free. I\'m guessing I have to use the Pumping Lemma for this, but how?The goal is to prove that for any string
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