apply.h

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#pragma once
 
#include "di/function/invoke.h"
#include "di/meta/algorithm.h"
#include "di/types/size_t.h"
#include "di/util/forward.h"
#include "di/util/get.h"
#include "di/vocab/tuple/tuple_like.h"
#include "di/vocab/tuple/tuple_size.h"
 
namespace di::vocab {
namespace detail {
    template<types::size_t... indices, typename F, concepts::TupleLike Tup>
    constexpr auto apply_impl(meta::ListV<indices...>, F&& f, Tup&& tuple)
        -> decltype(function::invoke(util::forward<F>(f), util::get<indices>(util::forward<Tup>(tuple))...)) {
        // NOLINTNEXTLINE(bugprone-use-after-move)
        return function::invoke(util::forward<F>(f), util::get<indices>(util::forward<Tup>(tuple))...);
    }
}
 
template<typename F, concepts::TupleLike Tup>
constexpr auto apply(F&& f, Tup&& tuple)
    -> decltype(detail::apply_impl(meta::MakeIndexSequence<meta::TupleSize<Tup>> {}, util::forward<F>(f),
                                   util::forward<Tup>(tuple))) {
    return detail::apply_impl(meta::MakeIndexSequence<meta::TupleSize<Tup>> {}, util::forward<F>(f),
                              util::forward<Tup>(tuple));
}
}
 
namespace di {
using vocab::apply;
}