id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
2742,Why the at_thread_exit cleanup function is const?,viboes,Anthony Williams,"If I remove the const on operator()() 

{{{
#!cpp
    struct mycallable1
    {
        void operator()()  {
            std::cout << ""mycallable1"" << std::endl;
        };
    };

    void my_thread() {
        std::cout << ""my_thread"" << std::endl;
        mycallable1 x;
        boost::this_thread::at_thread_exit(x);
    }

}}}
I get the following error:

{{{
gcc.compile.c++ ..\..\..\bin.v2\libs\interthreads\test\hello_world.test\gcc-4.3.2\debug\target-os-cygwin\threadapi-pthread\threading-multi\hello_world.o
../../../boost/thread/detail/thread.hpp: In member function `void boost::detail::thread_exit_function<F>::operator()() const [with F = mycallable1]':
..\example\hello_world.cpp:52:   instantiated from here
../../../boost/thread/detail/thread.hpp:474: error: passing `const mycallable1' as `this' argument of `void mycallable1::operator()()' discards qualifiers
}}}

Why the cleanup function must be const?
",Patches,closed,Boost 1.39.0,thread,Boost 1.37.0,Problem,fixed,at_thread_exit,