class no_manage (clause modifier)

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Specialisation for handlers that either:

• Don't expose the resumption (i.e., all resumes happen within command clauses),

• Don't access the handler object after resume,

which amounts to almost all practical use-cases of handlers. A no_manage clause does not participate in the reference-counting memory management of handlers, saving a tiny bit of performance.

template <typename Cmd>
struct no_manage { };

Usage:

struct MyCmd : command<int> { };

class MyHandler : flat_handler<bool, no_manage<MyCmd>> {
  virtual bool handle_command(MyCmd, resumption<int> r) override
  {
    std::move(r).resume(3);
	return 3;
  }
}

The handle_commandfunction is the same as in a usual handler, but it is not memory-managed.

:information_source: plain and no_resume clauses are automatically no_manage.