import std.experimental.logger;

import std.concurrency : Tid;

import std.datetime.systime : SysTime;

​

class FooLogger : Logger

{

    this(LogLevel lv)

    {

        super(lv);

    }

​

    void beginLogMsg(Sink)(Sink sink, string, int, string, string, string, LogLevel, Tid, SysTime, Logger)

    {

        sink.put("asdf");

    }

​

    override void beginLogMsg(string file, int line, string funcName, string prettyFuncName, string moduleName, LogLevel, Tid threadId, SysTime timestamp, Logger logger) @trusted

    {

        import std.stdio : stdout;

        beginLogMsg(stdout.lockingTextWriter, file, line, funcName, prettyFuncName, moduleName, logLevel, threadId, timestamp, logger);

    }

}