• JG (18/18) Jan 25 2022 Any ideas how one can achieve what is written in the subject line?
• Dennis (8/10) Jan 25 2022 ```D
• WebFreak001 (4/14) Jan 25 2022 note: default arguments after variadic arguments are supported
• JG (2/12) Jan 25 2022 Thank you very much.

JG <someone somewhere.com> writes:

Any ideas how one can achieve what is written in the subject line?

f below does achieve this but I one would expect that it produces
significant template bloat.

g achieves the aim but isn't very elegant.

     import std;
     void f(string file=__FILE__,size_t line=__LINE__,R...)(R r)
     {
       writeln(file,":",line," ",r);
     }
     void g(T)(T t,string file=__FILE__,size_t line=__LINE__)
     {
          writeln(file,":",line," ",t.expand);
     }

     void main()
     {
        f("hello ", 123);
        g(tuple("hello ",123));
     }

Dennis <dkorpel gmail.com> writes:

On Tuesday, 25 January 2022 at 12:11:01 UTC, JG wrote:
 Any ideas how one can achieve what is written in the subject 
 line?

```D
void f(T...)(auto ref T args, string file = __FILE__, int line = 
__LINE__)
{
     writeln(file, ":", line, ": ", args);
}
```

WebFreak001 <d.forum webfreak.org> writes:

On Tuesday, 25 January 2022 at 12:27:16 UTC, Dennis wrote:
 On Tuesday, 25 January 2022 at 12:11:01 UTC, JG wrote:
 Any ideas how one can achieve what is written in the subject 
 line?

 ```D
 void f(T...)(auto ref T args, string file = __FILE__, int line 
 = __LINE__)
 {
     writeln(file, ":", line, ": ", args);
 }
 ```

note: default arguments after variadic arguments are supported 
since D 2.079.0: 
https://dlang.org/changelog/2.079.0.html#default_after_variadic

JG <someone somewhere.com> writes:

On Tuesday, 25 January 2022 at 12:27:16 UTC, Dennis wrote:
 On Tuesday, 25 January 2022 at 12:11:01 UTC, JG wrote:
 Any ideas how one can achieve what is written in the subject 
 line?

 ```D
 void f(T...)(auto ref T args, string file = __FILE__, int line 
 = __LINE__)
 {
     writeln(file, ":", line, ": ", args);
 }
 ```

Thank you very much.