What is boost system error_code number 2

问题

I am trying to figure out what boost system error code 2 is. Within a program they print out the boost error code. However, I am not sure how to look up this error code.

Any help would be apprecaited.

回答1:

Off the top of my head: ENOENT/FileNotFound

See the errorcodes in http://www.boost.org/doc/libs/1_58_0/libs/system/doc/reference.html#Header-error_code

Live On Coliru

#include <boost/system/error_code.hpp>
#include <iostream>

int main()
{
    boost::system::error_code ec;

    ec.assign(2, boost::system::system_category());
    std::cout << ec.message() << "\n";

    ec.assign(boost::system::errc::no_such_file_or_directory, boost::system::system_category());
    std::cout << ec.message() << "\n";
}

Prints

No such file or directory
No such file or directory

回答2:

For windows it is ERROR_FILE_NOT_FOUND

Check the reference

来源：https://stackoverflow.com/questions/29782429/what-is-boost-system-error-code-number-2