to.hpp

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// Andrew Naplavkov
 
#ifndef STEP20_TO_HPP
#define STEP20_TO_HPP
 
#include "detail/utility.hpp"
#include <algorithm>
 
namespace step20 {
 
template <class To, std::ranges::input_range From>
To to(From&& from)
{
    auto result = To{};
    if constexpr (requires { result.reserve(std::ranges::size(from)); })
        result.reserve(std::ranges::size(from));
    std::ranges::copy(from, emplace_iterator(result));
    return result;
}
 
template <template <class...> class To, std::ranges::input_range From>
auto to(From&& from)
{
    return to<To<std::ranges::range_value_t<From>>>(std::forward<From>(from));
}
 
}  // namespace step20
 
#endif  // STEP20_TO_HPP