ServiceUtil.h File Reference

Utilities related to art service access. More...

#include "larcorealg/CoreUtils/UncopiableAndUnmovableClass.h"
#include "larcorealg/CoreUtils/ProviderPack.h"
#include "art/Framework/Services/Registry/ServiceHandle.h"
#include "canvas/Utilities/Exception.h"
#include "cetlib_except/demangle.h"
#include <type_traits>
#include <typeinfo>

Go to the source code of this file.

Classes
struct	lar::details::ServiceRequirementsChecker< PROVIDER >
struct	lar::details::ProviderPackExtractor< Services >
struct	lar::details::ServiceProviderRequirementsChecker< PROVIDER >
	Compiles only if PROVIDER class satisfied service provider requirements. More...
struct	lar::details::ServiceRequirementsChecker< PROVIDER >
struct	lar::details::ProviderPackExtractor< First, Others...>
struct	lar::details::ProviderPackExtractor< Service >

Namespaces
	lar
	LArSoft-specific namespace.
	lar::details
	Namespace hiding implementation details.

Typedefs
template<typename... Services>
using	lar::providersFrom_t = lar::ProviderPack< typename Services::provider_type...>
	Type of a provider pack with a provider from each of the Services. More...

Functions
template<typename T >
T::provider_type const *	lar::providerFrom ()
	Returns a constant pointer to the provider of specified service. More...
template<typename... Services>
auto	lar::providersFrom ()
	Returns a lar::ProviderPack with providers from all services. More...

Detailed Description

Utilities related to art service access.

Author

Jonathan Paley (jpale.nosp@m.y@fn.nosp@m.al.go.nosp@m.v), Gianluca Petrillo (petri.nosp@m.llo@.nosp@m.fnal..nosp@m.gov)

This library is currently a pure header. It provides:

• lar::providerFrom(), extracting and returning the provider from a single service
• lar::providersFrom(), extracting and returning providers from a set of services
• lar::providersFrom_t, a type defined as a provider pack with the providers from all the specified services

Definition in file ServiceUtil.h.