Oh, I had a look at the regression results and found this problem to be an expected failure on vc-8_0. A regression note says: "This compiler does not support detection of const rvalues" hm... i wonder why I didn't get a compile error or at least some warning? however, sorry for the noise and keep up the good work! sascha Sascha Seewald wrote:

Hi Boosters!

I've been playing around with BOOST_FOREACH a little and got some unexpected results. The following program crashes when I try to iterate a const map with BOOST_FOREACH. That's really strange because for the non-const map everything works fine.

Please take a look at the source. What's wrong here? Did I miss something?

This is the version in cvs on vc-8_0.

Cheers Sascha

----------------------------------------------------------------- <source>

#include <boost/foreach.hpp> #include <map>

class foo { public: typedef std::map<int, float> map_type;

/// return copy of map map_type map() const { return _map; }

/// return const copy of map map_type const map_c() const { return _map; }

private: map_type _map; };

void main() { foo f;

// iterate copy ... ok BOOST_FOREACH( foo::map_type::value_type i, f.map() ) {}

// iterate const copy ... crashes here! :-( BOOST_FOREACH( foo::map_type::value_type i, f.map_c() ) {} }

</source>

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Sascha Seewald wrote:

Hi Boosters!

I've been playing around with BOOST_FOREACH a little and got some unexpected results. The following program crashes when I try to iterate a const map with BOOST_FOREACH. That's really strange because for the non-const map everything works fine.

Please take a look at the source. What's wrong here? Did I miss something?

You haven't missed anything, and what's wrong here is your compiler, sadly. No version of MSVC is compliant enough to detect const-qualified rvalues. My only advice to you is: don't do that. -- Eric Niebler Boost Consulting www.boost-consulting.com