lar::util::details::hash< T > Struct Template Reference

Hash functions for art and larsoft objects. More...

#include <FindAllP.h>

Public Types
using	result_type = size_t
using	argument_type = T

Public Member Functions
result_type	operator() (argument_type const &v) const
template<>
auto	operator() (argument_type const &id) const -> result_type

Detailed Description

template<typename T>
struct lar::util::details::hash< T >

Hash functions for art and larsoft objects.

Definition at line 42 of file FindAllP.h.

Member Typedef Documentation

template<typename T >

using lar::util::details::hash< T >::argument_type = T

Definition at line 44 of file FindAllP.h.

template<typename T >

using lar::util::details::hash< T >::result_type = size_t

Definition at line 43 of file FindAllP.h.

Member Function Documentation

template<typename T >

result_type lar::util::details::hash< T >::operator()

(

argument_type const &

v

)

const

template<>

auto lar::util::details::hash< art::ProductID >::operator()

(

argument_type const &

id

)

const -> result_type

Definition at line 373 of file FindAllP.h.

      {
        // make sure we have enough bits in result_type;
        // if not, we need a more clever algorithm
        //static_assert(
        //  sizeof(id.processIndex()) + sizeof(id.productIndex())
        //    <= sizeof(result_type),
        //  "hash return type not large enough for hashing art::ProductID"
          //);
        // stack the process and product IDs in one integer
        //return result_type(
          //(id.processIndex() << sizeof(id.productIndex() * CHAR_BIT))
          //+ id.productIndex()
          //);
          return result_type( id.value() );
      } // hash<art::ProductID>::operator()

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

• lardata/lardata/ArtDataHelper/FindAllP.h