expression_operand.hpp

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#pragma once
#include "expression.hpp"
#include <concepts>
#include <type_traits>

namespace xtd {
  namespace expressions {
    //template <typename left_t, typename right_t>
    //concept expression_operand =
    //expression<left_t> || expression<right_t>;
    template <typename type_t>
    concept expression_operand =
    std::is_base_of_v<expression, std::decay_t<type_t>>;
  }
}