https://issues.dlang.org/show_bug.cgi?id=12100 --- Comment #12 from bearophile_hugs at eml.cc --- VC++ and GCC have "__COUNTER__": http://stackoverflow.com/questions/652815/has-anyone-ever-had-a-use-for-the-counter-pre-processor-macro http://msdn.microsoft.com/en-us/library/b0084kay.aspx --