includes/opentelemetry/std/utility.h

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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
 
#pragma once
 
// IWYU pragma: private, include "opentelemetry/nostd/utility.h"
 
#include <cstddef>
#include <utility>
 
#include "opentelemetry/version.h"
 
OPENTELEMETRY_BEGIN_NAMESPACE
// Standard Type aliases in nostd namespace
namespace nostd
{
 
//
// Backport of std::data
//
// See https://en.cppreference.com/w/cpp/iterator/data
//
template <class C>
auto data(C &c) noexcept(noexcept(c.data())) -> decltype(c.data())
{
  return c.data();
}
 
template <class C>
auto data(const C &c) noexcept(noexcept(c.data())) -> decltype(c.data())
{
  return c.data();
}
 
template <class T, std::size_t N>
T *data(T (&array)[N]) noexcept
{
  return array;
}
 
template <class E>
const E *data(std::initializer_list<E> list) noexcept
{
  return list.begin();
}
 
//
// Backport of std::size
//
// See https://en.cppreference.com/w/cpp/iterator/size
//
template <class C>
auto size(const C &c) noexcept(noexcept(c.size())) -> decltype(c.size())
{
  return c.size();
}
 
template <class T, std::size_t N>
std::size_t size(T (& /* array */)[N]) noexcept
{
  return N;
}
 
template <std::size_t N>
using make_index_sequence = std::make_index_sequence<N>;
 
template <std::size_t... Ints>
using index_sequence = std::index_sequence<Ints...>;
 
}  // namespace nostd
OPENTELEMETRY_END_NAMESPACE