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boostorg / system

Boost.org system module
http://boost.org/libs/system
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Currently, it's possible to have `e1 == e2` but `hash_value(e1) != hash_value(e2)` #101

Closed pdimov closed 1 year ago

pdimov commented 1 year ago 
#include <boost/system.hpp>
#include <system_error>
#include <cerrno>
#include <iostream>

int main()
{
    std::error_code e1( EINVAL, std::generic_category() );

    boost::system::error_code e2( e1 );
    boost::system::error_code e3( e2.value(), e2.category() );

    std::cout << "e2 == e3: " << std::boolalpha << ( e2 == e3 )
        << "; hash_value(e2) == " << hash_value( e2 )
        << "; hash_value(e3) == " << hash_value( e3 )
        << std::endl;
}

A code wrapping a std::error_code should probably never compare equal to a code not wrapping one.