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std::make_error_condition(std::io_errc)

STD：使[医]误差[医]条件%28 std：：io[医]ERRC%29

Defined in header ​​
std::error_condition make_error_condition( std::io_errc e ​(since C++11)

构造一个std::error_condition从类型的值中提取std::io_errc好像returnstd::error_condition(static_cast<int>(e),std::iostream_category())...

参数

e-error code number

返回值

类型值std::error_condition保存错误代码号的e与错误类别关联"iostream"...

例外

noexcept规格：

noexcept

例

二次

#include <iostream>
#include <system_error>
#include <string>
 
int main()
{
    std::error_condition ec  = std::make_error_condition(std::io_errc::stream
    std::cout << "error condition for io_errc::stream has value " << ec.value()
              << "\nand message \"" << ec.message() << "\"\n";
}

二次

产出：

二次

error condition for io_errc::stream has value 1
and message "unspecified iostream_category error"

二次

另见

error_condition (C++11)holds a portable error code (class)
io_errc (C++11)the IO stream error codes (enum)

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