• Satoshi (14/14) Apr 12 2016 Hello, I have a little problem with Variadic functions.
• Steven Schveighoffer (4/16) Apr 12 2016 Tango used to do this (probably still does). I don't remember the
• Adam D. Ruppe (8/10) Apr 12 2016 In C, you would make a version of the function that takes the

Satoshi <satoshi gshost.eu> writes:

Hello, I have a little problem with Variadic functions.

I have function like:

void perform(string method, ...) {
// here I want to call method findMethod with _argptr and 
_arguments

}

MethodDesc findMethod(string method, ...) {
// some lookup through the tables...
}


I know there are variadic templates, but I want to use this style 
of implementation.

Is it possible to pass varargs to another function or must I do 
it by asm?


Thanks for help :)

Steven Schveighoffer <schveiguy yahoo.com> writes:

On 4/12/16 5:08 AM, Satoshi wrote:
 Hello, I have a little problem with Variadic functions.

 I have function like:

 void perform(string method, ...) {
 // here I want to call method findMethod with _argptr and _arguments

 }

 MethodDesc findMethod(string method, ...) {
 // some lookup through the tables...
 }


 I know there are variadic templates, but I want to use this style of
 implementation.

 Is it possible to pass varargs to another function or must I do it by asm?


 Thanks for help :)

Tango used to do this (probably still does). I don't remember the 
details, but yes, it is definitely possible.

-Steve

Adam D. Ruppe <destructionator gmail.com> writes:

On Tuesday, 12 April 2016 at 09:08:06 UTC, Satoshi wrote:
 Is it possible to pass varargs to another function or must I do 
 it by asm?


In C, you would make a version of the function that takes the 
va_list type (see, for example, vprintf).

I believe in D, you'd want to do the same thing. Make another 
version of your function, one does foo(...) and one does 
foo(void* argptr, TypeInfo[] argtypes) and to forward the (...) 
version to the other, you call foo(_argptr, _arguments), which 
holds the real implementation.