Idea: Introduce zero-terminated string specifier

[Andrej Mitrovic]

I've noticed I'm having to do a lot of to!string calls when I want to
call the versatile writef() function. So I was thinking, why not
introduce a special zero-terminated string specifier which would both
alleviate the need to call to!string and would probably save on
needless memory allocation. If all we want to do is print something,
why waste time duplicating a string?

Let's say we call the new specifier %zs (we can debate for the actual name):

extern(C) const(void)* GetName();  // e.g. some C api functions..
extern(C) const(void)* GetLastName();

Before:
writefln("Name %s, Last Name %s", to!string(GetName()),
to!string(GetLastName()));

After:
writefln("Name %zs, Last Name %zs", GetName(), GetLastName());

Of course in this simple case you could just use printf(), but
remember that writef() is much more versatile and allows you to
specify %s to match any type. It would be great to match printf's
original meaning of %s with another specifier.