snemo::service_traits< T > Struct Template Reference

Template struct for defining trait types and functions for a service. More...

#include <falaise/snemo/services/service_traits.h>

Detailed Description

template<typename T>
struct snemo::service_traits< T >

Template struct for defining trait types and functions for a service.

No default implementation is replied, so all service classes must fully specialize service_traits as follows:

template <>
struct service_traits<MyService> {
  // `label_type` is a compile time string, and should be equivalent to the
  // service's typename, including any namespace
  using label_type = BOOST_METAPARSE_STRING("MyService");

  // `service_type` is the type to be extracted from @ref datatools::service_manager
  // It is usually *not* the same as the instance type
  using service_type = AServiceType;

  // `instance_type` is the actual interface type that clients will use via
  // @ref falaise::service_handle
  using instance_type = MyService;

  // `get` is a static function taking a reference to the service_type
  // and returning a pointer to the served instance_type.
  // In most cases, it calls a member function on the service_type instance
  static instance_type* get(service_type& s) {
    // get_served returns a ptr to MyService...
    return s.get_served();
   }
};

See also

snemo::service_handle

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The documentation for this struct was generated from the following file:

• falaise/snemo/services/service_traits.h