https://issues.dlang.org/show_bug.cgi?id=17453
--- Comment #5 from Soar <your...@126.com> --- (In reply to Rainer Schuetze from comment #4) > > when i create a project,has > > myproject/core/exception.d directory and file hierarchy > > > and im write a module in a file like "module winmain;" > > but i cant use any other like "module winmain.?" > > That's how the module system works (and the compiler complaining about > misusage). You might want to check the language specifications, e.g. > https://dlang.org/spec/module.html. Questions about it might be more > appropriate on the forum: https://forum.dlang.org/group/learn if directly use dub to complete,thats will be build sucess --