serialize_duration.hpp

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#pragma once
 
/// @file userver/formats/json/serialize_duration.hpp
/// @brief Serializers for std::chrono::duration types.
/// @ingroup userver_universal userver_formats_serialize
 
#include <chrono>
 
#include <userver/formats/json/string_builder_fwd.hpp>
#include <userver/formats/json/value_builder.hpp>
 
USERVER_NAMESPACE_BEGIN
 
namespace formats::serialize {
 
// Declare Serialize() as static as multiple translation units might declare
// different implementations of std::chrono::duration<> serializations.
template <class Rep, class Period>
static json::Value Serialize(std::chrono::duration<Rep, Period> duration,
                             To<formats::json::Value>) {
  return json::ValueBuilder(duration.count()).ExtractValue();
}
 
// Declare WriteToStream() as static as multiple translation units might declare
// different implementations of std::chrono::duration<> serializations.
template <class Rep, class Period>
static void WriteToStream(std::chrono::duration<Rep, Period> duration,
                          formats::json::StringBuilder& sw) {
  WriteToStream(duration.count(), sw);
}
 
}  // namespace formats::serialize
 
USERVER_NAMESPACE_END