[Issue 20012] export inside mixin doesn't seem to work

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20012

--- Comment #6 from Walter Bright <bugzilla at digitalmars.com> ---
You can also use:

enum M = "export extern(C) void fun() {}";
mixin(M);

--