Regarding hex strings

[foobar]

On Thursday, 18 October 2012 at 10:05:06 UTC, bearophile wrote:
> The docs say:
> http://dlang.org/lex.html
>
>>Hex strings allow string literals to be created using hex data. 
>>The hex data need not form valid UTF characters.<
>
> But this code:
>
>
> void main() {
>     immutable ubyte[4] data = x"F9 04 C1 E2";
> }
>
>
>
> Gives me:
>
> temp.d(2): Error: Outside Unicode code space
>
> Are the docs correct?
>
> --------------------------
>
> foobar:
>
>> Seems to me this is in the same ballpark as the built-in 
>> complex numbers. Sure it's nice to be able to write "4+5i" 
>> instead of "complex(4,5)" but how frequently do you actually 
>> ever need the _literals_ even in complex computational heavy 
>> code?
>
> Compared to "oct!5151151511", one problem with code like this 
> is that binary blobs are sometimes large, so supporting a x"" 
> syntax is better:
>
> immutable ubyte[4] data = hex!"F9 04 C1 E2";
>
> Bye,
> bearophile

How often large binary blobs are literally spelled in the source 
code (as opposed to just being read from a file)?
In any case, I'm not opposed to such a utility library, in fact I 
think it's a rather good idea and we already have a precedent 
with "oct!"
I just don't think this belongs as a built-in feature in the 
language.