GCC has a feature that I have sometimes whished for: "computed gotos". They are described here: http://www.tac.dk/cgi-bin/info2www?(gcc.info)Labels%20as%20Values

Although, I don't like the syntax, I do like the concept. In normal code, they are not terribly useful, but in generated code such as the output of "lex", it is a handy feature. I see it primarily as a tool for creating intraprocedural jump tables.

Would it be a valuable addition to D? It seems to be an easy thing to do.

Regards,
Martin

"Martin M. Pedersen" <martin@moeller-pedersen.dk> wrote in message news:d02o6p$udo$1@digitaldaemon.com...
> GCC has a feature that I have sometimes whished for: "computed gotos".
They
> are described here:
> http://www.tac.dk/cgi-bin/info2www?(gcc.info)Labels%20as%20Values
>
> Although, I don't like the syntax, I do like the concept. In normal code, they are not terribly useful, but in generated code such as the output of "lex", it is a handy feature. I see it primarily as a tool for creating intraprocedural jump tables.
>
> Would it be a valuable addition to D? It seems to be an easy thing to do.

I once looked into adding it to the C compiler. But since the switch statement already generates indexed jump tables, it was hard to see what advantage they'd have.

Martin M. Pedersen wrote:
> GCC has a feature that I have sometimes whished for: "computed gotos". They are described here:
> http://www.tac.dk/cgi-bin/info2www?(gcc.info)Labels%20as%20Values
> 
> Although, I don't like the syntax, I do like the concept. In normal code, they are not terribly useful, but in generated code such as the output of "lex", it is a handy feature. I see it primarily as a tool for creating intraprocedural jump tables.
> 
> Would it be a valuable addition to D? It seems to be an easy thing to do.

I pondered this a few months ago (not knowing that GCC already had it).  What I found, at least for my purposes, was that delegates worked just about as well.  You can construct a jump table as an array of delegates.

"Walter" <newshound@digitalmars.com> skrev i en meddelelse news:d03kkj$1tus$1@digitaldaemon.com...
> I once looked into adding it to the C compiler. But since the switch statement already generates indexed jump tables, it was hard to see what advantage they'd have.

Ok, I see your point.

Regards,
Martin