I'm having trouble understanding the docs on this. From what I could tell, it seemed like both of these should work:

writef("%.2X", myByte);
writef("%02X", myByte);

But both of them just simply print the format string as-is.

"Nick Sabalausky" <a@a.a> wrote in message news:i5cnrn$30hv$1@digitalmars.com...
> I'm having trouble understanding the docs on this. From what I could tell, it seemed like both of these should work:
>
> writef("%.2X", myByte);
> writef("%02X", myByte);
>
> But both of them just simply print the format string as-is.

I gotta learn not to simplify my test cases without re-testing them...

The above examples work fine, but the following don't - what I'm trying to do here is output a percent sign followed by a hex byte (as in URL escape sequences), but these just output "%%02X":

ubyte myByte = 0x09;
writef("%%%.2X", myByte);
writef("%%%02X", myByte);

I know I can easily work around that, but I'm wondering if this is a bug or if I've misunderstood how that format syntax is supposed to work.

On 29.08.2010 07:06, Nick Sabalausky wrote:
> ubyte myByte = 0x09;
> writef("%%%.2X", myByte);
> writef("%%%02X", myByte);

On codepad.org (DMD 1.026 last time I checked), this prints this:
%09%09

So it's probably a bug in the new formatting code.  I assume it's supposed to follow the C behavior in this case.

"torhu" <no@spam.invalid> wrote in message news:i5cqgo$37l$1@digitalmars.com...
> On 29.08.2010 07:06, Nick Sabalausky wrote:
>> ubyte myByte = 0x09;
>> writef("%%%.2X", myByte);
>> writef("%%%02X", myByte);
>
> On codepad.org (DMD 1.026 last time I checked), this prints this:
> %09%09
>
> So it's probably a bug in the new formatting code.  I assume it's supposed to follow the C behavior in this case.

http://d.puremagic.com/issues/show_bug.cgi?id=4775