...but the issue is also introduced by template translation here. So it looks like there...

...the compiler, User Defined Attributes now parse template arguments.
- In the standard library, `std.typecons...

...Segfault for malformed static if in imported template
(#15097)

https://github.com/dlang/dmd/pull...

...Fix Issue 22765 - Assertion failure in CppMangleVisitor.template_args
(#15100)

- dc9aeabc2383d39adcd4bb3955083f396c01a592 by Razvan Nitu:
  Fix...

...let you generalize the pattern by using template declaration:

```d
int fnAdd(T)(T v...

...program, not with every instance of S.

(Template functions may be instantiated more than once...

...std.meta: Filter;

struct S
{
    int x;
}

template Const(alias value)
{
    enum Const(A...) = value...

...in time, and no will to improve anything, the motto is go template yourself! (sumtype)

https://issues.dlang.org/show_bug.cgi?id=22765

--- Comment #3 from Dlang Bot <dlang...

...This presents problems in handling function and template overloads, as well as variadic parameter lists...