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std::error_code::category(3)  C++ Standard Libary std::error_code::category(3)

NAME
       std::error_code::category - std::error_code::category

Synopsis
	  const	std::error_category& category()	const noexcept;	 (since	C++11)

	  Returns the error category of	the error value.

Parameters
	  (none)

Return value
	  The error category of	the error value.

See also
	  value	obtains	the value of the error_code
		(public	member function)

http://cppreference.com		  2022.07.31	  std::error_code::category(3)

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