Yes thanks Steven! The queue was modified inside a const method of the class. I corrected it but now I get these warning(we treat them as errors). These are the warnings, 1> priority_queue_example.cpp 1>c:\Projects\lib\boost\boost\heap\detail\stable_heap.hpp(102): error C2220: warning treated as error - no 'object' file generated 1>c:\Projects\lib\boost\boost\heap\detail\stable_heap.hpp(102): warning C4100: 'rhs' : unreferenced formal parameter 1> c:\Projects\lib\boost\boost\heap\detail\stable_heap.hpp(102) : while compiling class template member function 'boost::heap::detail::size_ holder::size_holder(const boost::heap::detail::size_holder &)' 1> c:\Projects\lib\boost\boost\heap\detail\stable_heap.hpp(189) : see reference to function template instantiation 'boost::heap::detail::size_ holder::size_holder(const boost::heap::detail::size_holder &)' being compiled 1> c:\Projects\lib\boost\boost\heap\detail\stable_heap.hpp(151) : see reference to class template instantiation 'boost::heap::detail::size_holder' being compiled 1> c:\Projects\lib\boost\boost\heap\priority_queue.hpp(65) : see reference to class template instantiation 'boost::heap::detail::heap_ base' being compiled 1> with 1> [ 1> T=myObject * 1> ] 1> c:\Projects\priority_queue_example.h(193) : see reference to class template instantiation 'boost::heap::priority_queue' being compiledcompare< ObjectPtrCompare>,boost::parameter::void_,boost::parameter::void My priority_queue is declared as, mutable boost::heap::priority_queue

hp;

Can you please help me fix this, I have been trying to for 2 days. Not sure what this means. This is my comparison class defined, struct myObjectPtrCompare { bool operator()(const myObject* lhs, const myObject* rhs) const { return (lhs->getProp() < rhs->getProp()); } }; Can you please help with this? I understand that 'rhs' is unused, but in my implementation, it is used but the warning is pointing to boost code. I don't understand it. Thanks! On Sat, Dec 9, 2017 at 9:56 AM, Steven Watanabe via Boost-users < boost-users@lists.boost.org> wrote:

AMDG

On 12/08/2017 04:38 AM, Ram via Boost-users wrote:

...

<snip>

c:\Projects\pq_test.cpp(27): error C2662: 'void boost::heap::priority_queue::push(myObject *const &)' : cannot convert 'this' pointer from 'const boost::heap::priority_queue' to 'boost::heap::priority_queue &'1> Conversion loses qualifiers

Using Visual Studio 2013 C++. I understand that I am doing something wrong with const correctness, but I am not able to figure out what is wrong. Any help is appreciated.

You're trying to push onto a const priority_queue.

In Christ, Steven Watanabe

_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org https://lists.boost.org/mailman/listinfo.cgi/boost-users