On Wed, 20 Aug 2008 19:46:17 +0200, Andrey Semashev <andrey.semashev@gmail.com> wrote:
Boris wrote:
Andrey,
can you tell me why the following program writes the second message?
----------
[snip]
boost::log::sources::severity_logger logger;
int main() {
[snip]
boost::log::logging_core::get()->set_filter(boost::log::filters::attr<int>("Severity") < warn);
BOOST_LOG(logger) << "second message"; // Why is this message written?? } ----------
The first message is not written as the severity level warn is greater than info. However for the second message the default severity level info is smaller than warn. Thus I would expect the second message is not written either? Is this a bug?
The default severity will be 0, since the logger is default-constructed. And since you set the filter to pass everything with level below warn (which is 1), the second message passes the filter.
I see. Then I misunderstood how the filters work. But then again I don't understand why the first message is not written as the severity level is warn (1) and it is greater than info (0)? It should pass the filter? Boris