std::error_code::error_code

`error_code() noexcept;`	(1)	(C++11)
`error_code( int ec, const error_category& ecat ) noexcept;`	(2)	(C++11)
`template< class ErrorCodeEnum > error_code( ErrorCodeEnum e ) noexcept;`	(3)	(C++11)

1) error_code(0, std::system_category())

2) ec ecat

3) e *this = make_error_code(e) std::is_error_code_enum<ErrorCodeEnum>::value == true

make_error_code(std::errc) (C++11)	std::errc () [edit]
make_error_code(std::io_errc) (C++11)	() [edit]
make_error_code(std::future_errc) (C++11)	() [edit]


error_code::error_code
error_code::operator=
error_code::assign

error_code::clear

error_code::value
error_code::category
error_code::default_error_condition
error_code::message
error_code::operator bool

operator==operator!=operator<operator<=> (C++20)(C++20)(C++20)
operator<<

is_error_code_enum
hash<std::error_code>