``` struct mg_str { }; void mg_str_s() { } #define mg_str(s) mg_str_s(s) ``` The following fail with DMD ``` #defines(119): Error: template `bug.mg_str(__MP21)(__MP21 s)` conflicts with struct `bug.mg_str` at bug.c(1) ``` Perhaps this doesn't cover templates? https://github.com/dlang/dmd/pull/12567