Change representation of dynamic arrays?

[Anders F Björklund]

Walter Bright wrote:

>>> 1) Passing dynamic arrays to printf as in:
>>>     printf("my string is %*.s\n", str);
>>
>> Hmmm, currently I use printf("foo %s\n",std.string.toStringz(bar))
>> anyway, never tried what you're doing there. Did I miss something?
> 
> printf("my string is %*.s\n", str.length, str.ptr);
> 
> will be a little faster, because it doesn't need to allocate memory.

When I try this in C, it gives a warning about the "length" argument:
field precision should have type 'int', but argument 2 has type 'size_t'

Wouldn't this warning apply to C too, when using the printf function ?
I'm thinking it might need a cast(int) to work properly on 64-bit... ?

--anders