Boost::log如何使用相同的缩进打印？

#include <boost/log/core.hpp>
#include <boost/log/trivial.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/utility/setup/console.hpp>
#include <boost/log/utility/setup/common_attributes.hpp>

namespace logging = boost::log;

void init_logging()
{
    // 设置日志记录级别为trace
    logging::core::get()->set_filter(logging::trivial::severity >= logging::trivial::trace);

    // 定义日志格式
    logging::add_console_log(std::cout,
        logging::keywords::format = logging::expressions::stream
        << logging::expressions::attr<unsigned int>("LineID")
        << ": <" << logging::trivial::severity
        << "> " << logging::expressions::smessage
    );

    // 添加公共属性，例如时间戳
    logging::add_common_attributes();
}

int main()
{
    init_logging();

    // 设置缩进级别
    unsigned int indent_level = 0;

    // 打印日志
    BOOST_LOG_TRIVIAL(trace) << std::string(indent_level, ' ') << "This is a trace message";
    BOOST_LOG_TRIVIAL(debug) << std::string(indent_level, ' ') << "This is a debug message";

    // 增加缩进级别
    indent_level += 4;

    BOOST_LOG_TRIVIAL(info) << std::string(indent_level, ' ') << "This is an info message";

    // 减少缩进级别
    indent_level -= 4;

    BOOST_LOG_TRIVIAL(warning) << std::string(indent_level, ' ') << "This is a warning message";
    BOOST_LOG_TRIVIAL(error) << std::string(indent_level, ' ') << "This is an error message";
    BOOST_LOG_TRIVIAL(fatal) << std::string(indent_level, ' ') << "This is a fatal message";

    return 0;
}