[boost] [boost.assign] RFC on small updates

From: Thorsten Ottosen (nesotto_at_[hidden])
Date: 2005-02-05 18:50:57

Hi All,

For the next revision of boost.assign I have planned the following changes:

1. all arguments are passed by const reference

2. support for boost.graph

3. list_of()'s type has begin() and end() member functions. These will
   now return a mutable iterator even though they are const.
 (to allow better use of anonymous arrays)

4. a new super-efficient version of list_of() which can be used
    whenever efficiency matters and when references needs to be
    forwarded. For example:

template< class Range >
typename Range::const_iterator max_element( const Range& r )
{
    return std::max_element( r.begin(), r.end() );
}
...
    int a=1,b=5,c=3,d=4,e=2,f=9,g=0,h=7;
...
    int& max = *max_element( list_of<8,int&>(a)(b)(c)(d)(e)(f)(g)(h) );
    BOOST_CHECK_EQUAL( max, f );
    max = 8;
    BOOST_CHECK_EQUAL( f, 8 );

The question is if we should allow list_of<5,T> where T is not a reference or 
if we should
require a reference argument (for the sake of efficiency).

Thanks for your feedback

-Thorsten

-- 
Thorsten Ottosen
----------------------------
Dezide Aps -- Intelligent Customer Support:
www.dezide.com
Aalborg University --- Decision Support Systems:
http://www.cs.aau.dk/index2.php?content=Research/bss
C++ Boost:
www.boost.org
C++ Standard:
http://www.open-std.org/JTC1/SC22/WG21/