Re: %token-table doesn't seem to be working for C++?

[John P. Hartmann]

Alas, the scanner is allowed to return an integer only.  It cannot 
return a string.

Anyhow, your sample %token statement declares two tokens, not one; the 
last being meaningless.

On 3/2/19 21:13, Derek Clegg wrote:
> On Feb 18, 2019, at 9:59 PM, Akim Demaille <address@hidden> wrote:
> > Hi Derek,
> >
> > > Le 18 févr. 2019 à 21:07, Derek Clegg <address@hidden> a écrit :
> > >
> > > Perhaps I’m doing something wrong, but it appears that, in C++, %token-table 
> > > doesn’t work: instead of yytname, I only see yytname_. It also appears that 
> > > YYNTOKENS, YYNNTS, YYNRULES, and YYNSTATES are not defined, contrary to the 
> > > documentation. Am I missing something, or is this broken?
> >
> > Let me answer with a question: what are you trying to achieve?
> > What do you need these for?
>
> What I’d actually like to do is get the string name associated with a symbol.
>
> For example, if I had
>
> %token PLUS_ASSIGN     "+="
> %token MINUS_ASSIGN    "-="
> ...
>
> then I could write something akin to
>
> assignment-expression:
>    name assignment-op expression
>      {
>        std::cout << "Assignment: " << get_name_of_op($2) << "\n";
>        $$ = build_assignment(get_name_of_op($2), $name, $expression);
>      }
> ;
>
> assignment-op: "+=" | "-=" | ... ;
>
> Derek
>
>
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