ceph/src/jaegertracing/opentelemetry-cpp/third_party/prometheus-cpp/core/include/prometheus/detail/utils.h

   1 #pragma once
   2
   3 #include <cstddef>
   4
   5 #include "prometheus/detail/core_export.h"
   6 #include "prometheus/labels.h"
   7
   8 namespace prometheus {
   9 namespace detail {
  10
  11 /// \brief Label hasher for use in STL containers.
  12 struct PROMETHEUS_CPP_CORE_EXPORT LabelHasher {
  13   /// \brief Compute the hash value of a map of labels.
  14   ///
  15   /// \param labels The map that will be computed the hash value.
  16   ///
  17   /// \returns The hash value of the given labels.
  18   std::size_t operator()(const Labels& labels) const;
  19 };
  20
  21 }  // namespace detail
  22 }  // namespace prometheus