ClickHouse/libs/libcommon/include/ext/size.h

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#pragma once
#include <cstdlib>
namespace ext
{
/** \brief Returns number of elements in an automatic array. */
template <typename T, std::size_t N>
constexpr std::size_t size(const T (&)[N]) noexcept { return N; }
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/** \brief Returns number of in a container providing size() member function. */
template <typename T> constexpr auto size(const T & t) { return t.size(); }
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}