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Do not map system::generic to std::generic directly

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This commit is contained in:
Peter Dimov
2017-05-20 19:33:03 +03:00
parent c4238c745c
commit bdd1613898
2 changed files with 7 additions and 34 deletions
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include/boost/system/error_code.hpp
+4 -17
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@@ -250,22 +250,9 @@ namespace boost
operator std::error_category const & () const BOOST_SYSTEM_NOEXCEPT
{
if( *this == generic_category() )
{
std::error_category const & st = std::generic_category();
int ev = ENOENT;
// if the standard generic category works, use it; else not
if( st.equivalent( ev, st.default_error_condition( ev ) ) )
{
// g++ 4.x with libstdc++ 5 installed fails, because the two
// generic categories, v1 and v2, get mixed up
return st;
}
}
// do not map generic to std::generic on purpose; occasionally,
// there are two std::generic categories in a program, which leads
// to error codes/conditions mysteriously not being equal to themselves
return std_cat_;
}
@@ -618,7 +605,7 @@ namespace boost
{
return true;
}
else if( condition.category() == std::generic_category() )
else if( condition.category() == std::generic_category() || condition.category() == boost::system::generic_category() )
{
return pc_->equivalent( code, boost::system::error_condition( condition.value(), boost::system::generic_category() ) );
}