Compound.hpp

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#pragma once
 
#include <stratax/core/dtypes/Concepts.hpp>
 
#include <cstddef>
#include <type_traits>
#include <vector>
 
namespace stratax::core::compound_detail {
 
template<bool Stage, Array A, typename Evaluate>
A& write_results(A& lhs, Evaluate evaluate)
{
    const auto count = lhs.size();
    if constexpr (Stage)
    {
        std::vector<typename A::value_type> results;
        results.reserve(count);
        for (std::size_t i = 0; i < count; ++i)
        {
            results.push_back(static_cast<typename A::value_type>(evaluate(i)));
        }
        for (std::size_t i = 0; i < count; ++i)
        {
            lhs[i] = results[i];
        }
    }
    else
    {
        for (std::size_t i = 0; i < count; ++i)
        {
            lhs[i] = static_cast<typename A::value_type>(evaluate(i));
        }
    }
    return lhs;
}
 
template<typename A>
inline constexpr bool owns_storage = is_array<std::remove_cvref_t<A>>::value;
 
} // namespace stratax::core::compound_detail