select_item.hpp

#pragma once
 
#include <iron_query/expr.hpp>
#include <string>
#include <type_traits>
#include <utility>
 
namespace iron_query {
 
class [[nodiscard]] SelectItem final {
public:
  template <typename T,
            std::enable_if_t<std::is_convertible_v<T, Expr>, int> = 0>
  SelectItem(T &&value) : SelectItem(Expr(std::forward<T>(value)).ToString()) {}
 
  std::string ToString() const;
 
private:
  friend class Expr;
 
  explicit SelectItem(std::string s);
 
  std::string s_;
};
 
} // namespace iron_query