ClickHouse/base/common/insertAtEnd.h

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2021-08-03 15:42:49 +00:00
#pragma once
#include <vector>
/// Appends a specified vector with elements of another vector.
template <typename T>
void insertAtEnd(std::vector<T> & dest, const std::vector<T> & src)
{
if (src.empty())
return;
dest.reserve(dest.size() + src.size());
dest.insert(dest.end(), src.begin(), src.end());
}
template <typename T>
void insertAtEnd(std::vector<T> & dest, std::vector<T> && src)
{
if (src.empty())
return;
if (dest.empty())
{
dest.swap(src);
return;
}
dest.reserve(dest.size() + src.size());
dest.insert(dest.end(), std::make_move_iterator(src.begin()), std::make_move_iterator(src.end()));
src.clear();
}