• Martin M. Pedersen (10/10) Mar 01 2005 GCC has a feature that I have sometimes whished for: "computed gotos". T...
• Walter (6/14) Mar 01 2005 They
• Martin M. Pedersen (5/8) Mar 02 2005 Ok, I see your point.
• Russ Lewis (4/14) Mar 02 2005 I pondered this a few months ago (not knowing that GCC already had it).

"Martin M. Pedersen" <martin moeller-pedersen.dk> writes:

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

"Walter" <newshound digitalmars.com> writes:

"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" <martin moeller-pedersen.dk> writes:

"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

Russ Lewis <spamhole-2001-07-16 deming-os.org> writes:

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.