expanding variadic into format

[rikki cattermole]

On 01/11/2018 12:53 AM, Codifies wrote:
> I have a routine that was happily printing ASCII strings and values 
> using opengl, however I want to improve it so it can be used in the same 
> manner as some other languages printf function...
> 
> void printValue(Font fnt,float x, float y, string frmt, ...)
> {
>      /* matrix math and other stuff removed for readability */
>      string message = format(frmt, _arguments);
> 
> 
> no surprise this naive attempt causes a runtime error as its trying to 
> format a range using the first format specifier in frmt
> 
> am I going to have to chop frmt into descrete chunks that have just one 
> % symbol in them and then build up the formatted message string like that?
> 
> is there some way to somehow transfer my input variadic into formats 
> variadic ?

Just to confirm, format there is std.format:format right?

Because that isn't using C variadics, its using template variadics.