Question

I wanted to use boost::thread in my program, but get the following compiler error (Visual Studio 2005):

Error   1   **error C2064**: term does not evaluate to a function taking 0 arguments   d:\...\boost_1_37_0\boost\thread\detail\thread.hpp  56 

Therefore I tried to recreate the problem in a small program and modified the working Hello World example from this site.

My test code now looks like this. Why is it not working inside a class?:

#include <boost/thread.hpp> #include <iostream>   class HelloWorld { public:     void hello();     void entry(); };  void HelloWorld::entry() {     boost::thread thrd(&HelloWorld::hello);     thrd.join(); }  void HelloWorld::hello()  {      std::cout << 'Hello world, I'm a thread!' << std::endl; }  int main(int argc, char* argv[])  {      HelloWorld *bla = new HelloWorld;     bla->entry();     return 0; } 

Answer 1

Try it like this – the boost::thread constructor is expecting a boost::function0 (which a function pointer is, but a member function pointer isn’t, due to the this pointer).

void HelloWorld::entry() {     boost::thread thrd(boost::bind(&HelloWorld::hello,this));     thrd.join(); }