C string to D without memory allocation?

[Jakob Ovrum via Digitalmars-d-learn]

On Monday, 21 December 2015 at 08:35:22 UTC, Jonathan M Davis 
wrote:
> There's also fromStringz that Jakob suggests using elsewhere in 
> this thread, but that really just boils down to
>
>     return cString ? cString[0 .. strlen(cString)] : null;
>
> So, using that over simply slicing is primarily for 
> documentation purposes, though it does make it so that you 
> don't have to call strlen directly or check for null before 
> calling it.

To add to this, the main motivation behind `fromStringz` is that 
`cString` is often a non-trivial expression, such as a function 
call. With `fromStringz`, this expression can always be put in 
the argument list and it will only be evaluated once. Otherwise a 
variable has to be added:

auto cString = foo();
return cString[0 .. strlen(cString)];