Re: [Boost-users] [proto] extended expressions and assignment operator

Subject: Re: [Boost-users] [proto] extended expressions and assignment operator
From: Eric Niebler (eric_at_[hidden])
Date: 2009-08-24 14:35:51

Maurizio Vitale wrote:
> Hi Eric,
> 
>   I'm trying to have proto allow me to do things like:
> 
> (a,b,c) = expr;
> 
> where a, b, c are integers 

Protofied integers, it seems.

> of different width 

You mean, short, int, long?

> and they should be
> assigned the appropriate slice of expr. 

What is expr, and what is a slice of expr?

> For instance:
> 
> | variable | width | value     |
> |----------+-------+-----------|
> | a        |     2 | expr[6:7] |
> | b        |     4 | expr[2:5] |
> | c        |     2 | expr[0:1] |

I don't understand your syntax.

> width are compile-time constants and I need to keep them so (they'll be
> used to compute masks and shifts at compile time).
> 
> First problem is that I do not know of a good way for doing this. 
<snip>

I'm afraid you've lost me. I don't know what "this" is. :-( Care to try 
again?

-- 
Eric Niebler
BoostPro Computing
http://www.boostpro.com