From: MB (mb2act_at_[hidden])
Date: 2006-01-16 13:44:51
Thorsten Ottosen wrote:
> MB wrote:
>
>>Sebastian Redl wrote:
>>
>>
>>I think 'add_const' is reserved for Boost.TypeTraits.
>>
>>I post this tiny proposal to Boost.Devel anyway.
>>
>
>
> When we discussed the wg21 proposal many months ago and I added
> const_begin() etc to boost.range, Dave Abrahams used this function
>
> template< class T >
> inline T const& as_const( T const& r )
> { return r; }
I found the thread.
http://listarchives.boost.org/Archives/boost/2004/09/72340.php
Maybe the time has come? :-)
A range algorithm like Boost.StringAlgorithm
no longer allows users to call 'const_begin/end'.
Now that something like 'as_const' is really needed.
boost::for_each(
rng |
const_qualified | // protect rng!
reversed |
null_terminated |
tab_expanded |
utf8_decoded |
transformed(toZero()),
&do_something
);
I think 'const_rbegin' is obviously blob ;-)
> Similarly, we might add
>
> as_volatile();
> as_const_volatile();
> as_mutable();
>
> The latter would be a cast from rvalue to lvalue like it happens in
> boost.foreach.
Beyond my sight. Is it possible such conversion?
Regards,
MB
p-stade.sourceforge.net