ranges.h

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// This file's extension implies that it's C, but it's really -*- C++ -*-.
/*
 * Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration.
 */
#ifndef CXXUTILS_RANGES_H
#define CXXUTILS_RANGES_H
 
 
#include <ranges>
 
 
namespace CxxUtils {
 
 
template <class RANGE, class T>
concept InputRangeOverT =
  std::ranges::input_range<RANGE> &&
  std::convertible_to<std::ranges::range_value_t<RANGE>, T>;
 
 
#if __cpp_lib_ranges_to_container
// If we're using C++23, just take the library version.
using std::ranges::to;
#else
 
// Simplified version of C++23 to().
template <class CONT, class RANGE>
CONT to (RANGE&& r)
{
  return CONT (std::ranges::begin (r), std::ranges::end (r));
}
 
#endif
 
} // namespace CxxUtils
 
 
#endif // not CXXUTILS_RANGES_H