Re: [Boost-users] [bind] Help with functional composition ofshared_ptr::use_count in std::map

-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Hughes, James Sent: 11 June 2007 12:04 To: boost-users@lists.boost.org Subject: [Boost-users] [bind] Help with functional composition ofshared_ptr::use_count in std::map

Hello all,

I'm trying to use bind to help with removeif in a std::map. I want to remove items where the shared_ptr use_count is 1.

map Fred;

RemoveIf(Fred.begin(), Fred.end(), boost::bind(std::equal_to<long>(), 1, boost::bind(&map

...

::value_type::second::use_count, _1) )

However, I get a compile error on ::second not being a class or namespace.

Anyone know how I should do this? I'm a beginner at boost::bind, so be gentle....

James

Sorry, that should read remove_if, and in fact the purpose is better served using shared_ptr<>::unique, which should mean I can get rid of the std:equal_to stuff RemoveIf(Fred.begin(), Fred.end(), boost::bind(&map

::value_type::second::unique, _1) )

Still get same compile fault however. James This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately.