Constructing a predictive parser table for this grammar: ​E:=EE+/EE-/num










0















I have removed the left recursion and left factoring, now the grammar looks like this:



E :=num E'' 
E'':=EE'E''/epsilon
E':=+/-.


But I am stuck in finding the FOLLOW(E'') and thus cannot further proceed with the problem.

I am learning by myself so please help me if I am making any conceptual mistake.










share|improve this question






















  • Is this input for some program?

    – Marichyasana
    Nov 12 '18 at 9:58











  • @Marichyasana I didn't get your question. This is not an input for a program it's just an LL(1) grammar with production rules. And I have to construct a parsing table for it, which in turn checks whether the input is syntactically correct or wrong.

    – Rohit Mundada
    Nov 12 '18 at 12:58






  • 1





    E'' can only be at the end of the sentence, so if you are using an augmented grammar its FOLLOW set is $ (or whatever you use for the end token).

    – rici
    Nov 12 '18 at 15:06















0















I have removed the left recursion and left factoring, now the grammar looks like this:



E :=num E'' 
E'':=EE'E''/epsilon
E':=+/-.


But I am stuck in finding the FOLLOW(E'') and thus cannot further proceed with the problem.

I am learning by myself so please help me if I am making any conceptual mistake.










share|improve this question






















  • Is this input for some program?

    – Marichyasana
    Nov 12 '18 at 9:58











  • @Marichyasana I didn't get your question. This is not an input for a program it's just an LL(1) grammar with production rules. And I have to construct a parsing table for it, which in turn checks whether the input is syntactically correct or wrong.

    – Rohit Mundada
    Nov 12 '18 at 12:58






  • 1





    E'' can only be at the end of the sentence, so if you are using an augmented grammar its FOLLOW set is $ (or whatever you use for the end token).

    – rici
    Nov 12 '18 at 15:06













0












0








0








I have removed the left recursion and left factoring, now the grammar looks like this:



E :=num E'' 
E'':=EE'E''/epsilon
E':=+/-.


But I am stuck in finding the FOLLOW(E'') and thus cannot further proceed with the problem.

I am learning by myself so please help me if I am making any conceptual mistake.










share|improve this question














I have removed the left recursion and left factoring, now the grammar looks like this:



E :=num E'' 
E'':=EE'E''/epsilon
E':=+/-.


But I am stuck in finding the FOLLOW(E'') and thus cannot further proceed with the problem.

I am learning by myself so please help me if I am making any conceptual mistake.







compiler-construction grammar context-free-grammar






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 12 '18 at 9:54









Rohit MundadaRohit Mundada

6




6












  • Is this input for some program?

    – Marichyasana
    Nov 12 '18 at 9:58











  • @Marichyasana I didn't get your question. This is not an input for a program it's just an LL(1) grammar with production rules. And I have to construct a parsing table for it, which in turn checks whether the input is syntactically correct or wrong.

    – Rohit Mundada
    Nov 12 '18 at 12:58






  • 1





    E'' can only be at the end of the sentence, so if you are using an augmented grammar its FOLLOW set is $ (or whatever you use for the end token).

    – rici
    Nov 12 '18 at 15:06

















  • Is this input for some program?

    – Marichyasana
    Nov 12 '18 at 9:58











  • @Marichyasana I didn't get your question. This is not an input for a program it's just an LL(1) grammar with production rules. And I have to construct a parsing table for it, which in turn checks whether the input is syntactically correct or wrong.

    – Rohit Mundada
    Nov 12 '18 at 12:58






  • 1





    E'' can only be at the end of the sentence, so if you are using an augmented grammar its FOLLOW set is $ (or whatever you use for the end token).

    – rici
    Nov 12 '18 at 15:06
















Is this input for some program?

– Marichyasana
Nov 12 '18 at 9:58





Is this input for some program?

– Marichyasana
Nov 12 '18 at 9:58













@Marichyasana I didn't get your question. This is not an input for a program it's just an LL(1) grammar with production rules. And I have to construct a parsing table for it, which in turn checks whether the input is syntactically correct or wrong.

– Rohit Mundada
Nov 12 '18 at 12:58





@Marichyasana I didn't get your question. This is not an input for a program it's just an LL(1) grammar with production rules. And I have to construct a parsing table for it, which in turn checks whether the input is syntactically correct or wrong.

– Rohit Mundada
Nov 12 '18 at 12:58




1




1





E'' can only be at the end of the sentence, so if you are using an augmented grammar its FOLLOW set is $ (or whatever you use for the end token).

– rici
Nov 12 '18 at 15:06





E'' can only be at the end of the sentence, so if you are using an augmented grammar its FOLLOW set is $ (or whatever you use for the end token).

– rici
Nov 12 '18 at 15:06












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