• Dylan Knutson (10/10) Jun 04 2013 Hello!
• Simen Kjaeraas (6/15) Jun 04 2013 Try without the alias - variadic template parameters may be aliases or
• Dylan Knutson (4/7) Jun 04 2013 Oh; I didn't know that variadic template params were aliased.
• Timon Gehr (4/10) Jun 04 2013 Oh, it is more subtle than that. DMD won't accept built-in types as
• Timon Gehr (7/16) Jun 04 2013 It wouldn't add any functionality.

"Dylan Knutson" <tcdknutson gmail.com> writes:

Hello!
As far as I can tell, you can't have a variadic of alias 
parameters on a template, which is strange to me. Eg, you can't 
do something like:

template Foo(alias Args...) {
  ...
}

int i = 0;
Foo!(std.conv, "123", i);

Is there a reason for this restriction?

"Simen Kjaeraas" <simen.kjaras gmail.com> writes:

On 2013-06-05, 00:33, Dylan Knutson wrote:

 Hello!
 As far as I can tell, you can't have a variadic of alias parameters on a  
 template, which is strange to me. Eg, you can't do something like:

 template Foo(alias Args...) {
   ...
 }

 int i = 0;
 Foo!(std.conv, "123", i);

 Is there a reason for this restriction?

Try without the alias - variadic template parameters may be aliases or
types or any mix thereof.

Also, please ask such questions in digitalmars.D.learn in the future.

-- 
Simen

"Dylan Knutson" <tcdknutson gmail.com> writes:

 Also, please ask such questions in digitalmars.D.learn in the 
 future.

Sorry; I was trying to decide if if belonged there or here, so I 
decided on here because it was a question about D's grammar.

 It wouldn't add any functionality.

Oh; I didn't know that variadic template params were aliased. 
Thanks for the clarification :-)

Timon Gehr <timon.gehr gmx.ch> writes:

On 06/05/2013 01:13 AM, Dylan Knutson wrote:
 Also, please ask such questions in digitalmars.D.learn in the future.

 Sorry; I was trying to decide if if belonged there or here, so I decided
 on here because it was a question about D's grammar.

 It wouldn't add any functionality.

 Oh; I didn't know that variadic template params were aliased. Thanks for
 the clarification :-)

Oh, it is more subtle than that. DMD won't accept built-in types as 
arguments to alias template parameters, but they still can be passed as 
arguments to variadic template params.

Timon Gehr <timon.gehr gmx.ch> writes:

On 06/05/2013 12:33 AM, Dylan Knutson wrote:
 Hello!
 As far as I can tell, you can't have a variadic of alias parameters on a
 template, which is strange to me. Eg, you can't do something like:

 template Foo(alias Args...) {
   ...
 }

 int i = 0;
 Foo!(std.conv, "123", i);

 Is there a reason for this restriction?

It wouldn't add any functionality.

template Foo(Args...) {
  ...
}

int i = 0;
Foo!(std.conv, "123", i);