Bug 19766 – Cannot pass overload set consisting solely of templated functions as alias

Consider the following code: // void foo(int) { } void foo(T : int)(T) { } void bar(T : string)(T) { } void baz(T : bool)(T) { } alias a = foo; alias a = bar; alias a = baz; void test(alias fn)() { fn(0); fn(null); fn(true); } void main() { test!a(); } Result: onlineapp.d: Error: overload alias `onlineapp.a` forward declaration If `foo` is a function, as per the comment, I can pass `a` as an overload set to `test()`, even though the other two functions in the set are templated. However, since `foo` is also a template, I get an inexplicable error message.

*** This issue has been marked as a duplicate of issue 21255 ***