...12: error: none of the overloads of template 'core.stdc.stdarg.va_arg' are callable...

...generic things, e.g. type erasure), collapse template instances, and keep ctfe things ctfe only...

Note that this doesn't work in gdc.

The templated version is actually more akin...

here's how

```d
import core.vararg;

void main()
{
    foo(.5, 5);
}

void foo(...)
{
    int...

https://dlang.org/phobos/core_vararg.html

The common way to use **va_arg** is...

...pull request #15572 "Fix Issue 24135 - Eponymous template member overloads not shown as call candidates...

...generally be static, why not use a template parameter?  Besides, everything can be expressed with...

...Error: template instance `opCast!int` does not match template declaration
`opCast(T : bool)()`
Error: template...

...be like how const disappears on a template parameter when the type itself is already...

...to be flexible enough by using a template parameter?

```d
enum Options : bool
{
  silenceErrorsOff, silenceErrorsOn...