On Tuesday, 16 April 2019 at 21:07:51 UTC, Machine Code wrote:
void f(appender!string buffer) { }
appender isn't a type, it is a helper function that returns a type called Appender:
http://dpldocs.info/experimental-docs/std.array.appender.1.html http://dpldocs.info/experimental-docs/std.array.Appender.html So try like `void f(Appender!string buffer) {}`