Trouble creating a formatted assert wrapper

[Chris Nicholson-Sauls]

On Sunday, 2 September 2012 at 23:40:01 UTC, Peter Alexander 
wrote:
>
> Consider:
>
> myAssert(false, "%d", 1);
>
> What is Args? "%d", 1 could refer to the optional arguments, or 
> the variadic arguments. Both match.

Easy: the variadic arguments are not, themselves, optional.  
Match the variadic.  This kind of problem is already solved in 
every language with "scattering" assignments, and other such 
features.