flat_mapset.h

#ifndef CHROMIUM_IPFS_VOCAB_MAP_SET_H_
#define CHROMIUM_IPFS_VOCAB_MAP_SET_H_
 
#if __has_include("base/containers/flat_map.h")  // Chromium
 
#include "base/containers/flat_map.h"
#include "base/containers/flat_set.h"
#include "base/debug/debugging_buildflags.h"
namespace ipfs {
using base::flat_map;
using base::flat_set;
}  // namespace ipfs
 
#elif __has_cpp_attribute(__cpp_lib_flat_map) && \
    __has_cpp_attribute(__cpp_lib_flat_set)
 
#include <flat_map>
#include <flat_set>
namespace ipfs {
using std::flat_map;
using std::flat_set;
}  // namespace ipfs
 
#elif __has_include(<boost/container/flat_map.hpp>)  //Boost
#include <boost/container/flat_map.hpp>
#include <boost/container/flat_set.hpp>
namespace ipfs {
using boost::container::flat_map;
using boost::container::flat_set;
}  // namespace ipfs
 
#else
 
#error \
    "Provide an implementation for flat_map and flat_set, or install boost or have a Chromium tree or use a newer C++ version."
 
#endif
 
#endif  // CHROMIUM_IPFS_VOCAB_MAP_SET_H_