Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

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Completion handler requirements

A completion handler must meet the requirements for a handler. A value h of a completion handler class should work correctly in the expression h().

Examples

A free function as a completion handler:

void completion_handler()
{
  ...
}

A completion handler function object:

struct completion_handler
{
  ...
  void operator()()
  {
    ...
  }
  ...
};

A non-static class member function adapted to a completion handler using bind():

void my_class::completion_handler()
{
  ...
}
...
my_io_service.post(boost::bind(&my_class::completion_handler, this));

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