Auto type deduction in 'foreach'

[akrzemi1@…]

I would like to request a new tool in Boost.Foreach that would emulate the following C++0x construct:

for( auto const& x : collection ) { ... }

It would look something like:

BOOST_FOREACH_AUTO( const& x, collection ) {...}

To prove it is doable I enclose the following suboptimal implementation as a proof of concept. It was already pointed out that the faster implementation is possible.

#define BOOST_FOREACH_AUTO( INIT, CONT ) \

BOOST_FOREACH( \

BOOST_TYPEOF( *boost::begin(CONT) ) INIT, \ CONT \

)

[alex@…]

Is this feature going to be accepted?

[Eric Niebler]

Ah, sorry no. BOOST_FOREACH is legacy and is in maintenance mode. No new features will be added. The C++11 range-based for loop is the replacement. Please use that.