inplace_vector.h

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// This file's extension implies that it's C, but it's really -*- C++ -*-.
/*
 * Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration.
 */
 
 
#ifndef CXXUTILS_INPLACE_VECTOR_H
#define CXXUTILS_INPLACE_VECTOR_H
 
#include <version>
 
#ifdef __cpp_lib_inplace_vector
 
// Have std::inplace_vector.  Put it in the CxxUtils namespace.
#include <inplace_vector>
namespace CxxUtils {
  using std::inplace_vector;
}
 
#else
 
// We don't have std::inplace_vector.
// Use boost::container::small_vector instead.
#include <boost/container/small_vector.hpp>
namespace CxxUtils {
  template <class T, size_t N>
  using inplace_vector = boost::container::small_vector<T, N>;
}
 
#endif
 
 
#endif // not CXXUTILS_INPLACE_VECTOR_H