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<source_location> (C++20)

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(C++20)
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() [] 

namespace std {
  struct source_location;
}

std::source_location

namespace std {
  struct source_location {
    //   
    static consteval source_location current() noexcept;
    constexpr source_location() noexcept;

    //     
    constexpr uint_least32_t line() const noexcept;
    constexpr uint_least32_t column() const noexcept;
    constexpr const char* file_name() const noexcept;
    constexpr const char* function_name() const noexcept;

  private:
    uint_least32_t line_;               //   
    uint_least32_t column_;             //   
    const char* file_name_;             //   
    const char* function_name_;         //   
  };
}
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