printf() metaprogramming challenge

[Walter Bright]

On 5/24/2019 8:35 AM, Jacob Carlborg wrote:
> This is kind of nice, but I would prefer to have a complete implementation 
> written in D (of sprintf) that is @nogc @safe nothrow and pure. To avoid having 
> to add various hacks to apply these attributes.

C's sprintf is already @nogc nothrow and pure. Doing our own is not that easy, 
in particular, the floating point formatting is a fair amount of tricky work.

Besides, this is a few lines of code, and would fit in fine with betterC.


> I can also add that there was this guy at DConf that said that if a D string 
> should be passed to a C library it should manually pass the pointer and length 
> separately without any magic ;)

That wouldn't work with %.*s because the .length argument must be cast to int.