into_variant_each.h

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#pragma once
 
#include "di/execution/algorithm/into_variant.h"
#include "di/execution/concepts/sender.h"
#include "di/execution/sequence/transform_each.h"
#include "di/function/pipeable.h"
#include "di/function/tag_invoke.h"
 
namespace di::execution {
namespace into_variant_each_ns {
    struct Function : function::pipeline::EnablePipeline {
        template<concepts::Sender Seq>
        auto operator()(Seq&& sequence) const {
            if constexpr (concepts::TagInvocable<Function, Seq>) {
                return tag_invoke(*this, util::forward<Seq>(sequence));
            } else {
                return transform_each(util::forward<Seq>(sequence), into_variant);
            }
        }
    };
}

constexpr inline auto into_variant_each = into_variant_each_ns::Function {};
}