Re: [boost] Interest in breakable labeled scope emulation?

Subject: Re: [boost] Interest in breakable labeled scope emulation?
From: Brian Ravnsgaard Riis (brian_at_[hidden])
Date: 2013-01-13 14:37:44

Den Sun, 13 Jan 2013 20:30:14 +0100 skrev Vicente J. Botet Escriba  
<vicente.botet_at_[hidden]>:

[snip]
> Of course in order to be really structired the jumping to the underlying  
> label should be forbiden (by the compiler), but I don't think that a  
> preprocessor solution could take care of this. So the following not  
> desired and not structured code could compile even if we would like an  
> compile error.
>
>
> BOOST_NAMED_BLOCK(L)
> {
> // ...
> }
> // [1]
> //...
> BOOST_BREAK(L); // go to [1]

So, the underlying idea is to get something like "break" and "continue" to  
work inside any "named" block, not just loops? If so (as you demonstrate  
above) I'm fairly certain a correct solution cannot be implemented using  
just the preprocessor.

  /Brian