Re: [boost] Re: Automata builder -- interface

From: Greg Colvin (gcolvin_at_[hidden])
Date: 2001-05-30 16:07:48

From: Douglas Gregor <gregod_at_[hidden]>
> On Wednesday 30 May 2001 03:04 pm, you wrote:
> > > > if (allow_typeof) {
> > > >   typespec = TYPEOF '(' expr ')' | TYPEOF '(' type_id ')';
> > > > }
> >
> > <offtopic>
> >
> > BTW, I'd love to have typeof. I read somewhere that there
> > was a way to simulate this. Any info?
> 
> The only solution I've seen for this was proposed by Bill Gibbons, but it 
> required types to be registered first - making it completely useless for 
> generic programming where typeof would be most useful.
> 
> > I'd also love to have: auto var = <expression>
> 
> That'd be nice, too, but the incompatibility with C will likely hinder it. 
> The nice thing about typeof() is that it fits into the language easily and 
> most people agree on the semantics of it.
> 
> > I hear CW6 and G++3 has typeof. Correct me if I'm wrong.
> 
> Yes, g++ 3.0 will have typeof. 
> 
> > It is not standard but Andrei told me it has a very big chance
> > to be standard. So, can we simulate: auto var = <expression>
> > with typeof?
> 
> typeof(expression) var = expression;
> 
> ... but it's a real pain to type :).

Hasn't C eliminated or at least deprecated implicit int?

In which case, can't the suntax just be

   var = expression;

?

> > </offtopic>
> >
> > Joel de Guzman
> 
> Doug
> 
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