You have to initialize the variable yourself, e.g.
%type course_plot { std::vector<unsigned long>* }
course_plot(V) ::= COURSE_PLOT_BEG course_plot_sector(A) .
{
V = new std::vector<unsigned long>;
V->push_back(A);
}
course_plot(V) ::= course_plot(L) COURSE_PLOT_GT course_plot_sector(A) .
{
V = L;
V->push_back(A);
}
And yes, I parse TradeWars 2002 with lemon. /bow
Ron Wilson, Engineering Project Lead
(o) 434.455.6453, (m) 434.851.1612, www.harris.com
HARRIS CORPORATION | RF Communications Division
assuredcommunications(tm)
> -----Original Message-----
> From: [email protected] [mailto:sqlite-users-
> [email protected]] On Behalf Of Igmar Palsenberg
> Sent: Monday, February 22, 2010 7:39 AM
> To: [email protected]
> Subject: [sqlite] Questions regarding Lemon
>
>
> Hi,
>
> After a decode or so I've begun to program in C again. I've writing a
> parser, and Lemon seems like the right tool for the job. SQLite itself
> is an excellent read when starting with lemon.
> However, a few questions remain unanswered :
>
> - How do variables get initialized ? For example :
>
> %type assigments { struct llist *}
>
> assignments(A) ::= assignments assignment(B). { /* ..... */ }
> assignments(A) ::= assignment(B). {/* .... */ }
>
> Can I assume that A, when the rule is executed the first time, is NULL ?
>
> - What is the meaning of @ in an assignment ? From the sqlite parse.y
> source :
>
> transtype(A) ::= DEFERRED(X). {A = @X;}
>
> Thanx in advance for all the hints :)
>
>
> Regards,
>
>
> Igmar
>
> _______________________________________________
> sqlite-users mailing list
> [email protected]
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