Integer to hexadecimal string
BCS
ao at pathlink.com
Wed Jul 9 11:37:37 PDT 2008
Reply to Jarrett,
> "BCS" <ao at pathlink.com> wrote in message
> news:55391cb32ef558caafbcbd0e7af2 at news.digitalmars.com...
>
>> Reply to Jarrett,
>>
>>> "BCS" <ao at pathlink.com> wrote in message
>>> news:55391cb32eed78caaf3194222520 at news.digitalmars.com...
>>>> you can even force the format string to be built at compile time.
>>>>
>>>> char[] toHex(T)(T arg){ return format("%."~itoa!(T.sizeof * 2)~"x",
>>>> arg); }
>>>>
>>> No function necessary.
>>>
>>> return format("%." ~ (T.sizeof * 2).stringof ~ "x", arg);
>>>
>>> Untested, but you can use .stringof to do number to string at
>>> compile time. Not sure if it'll give "T.sizeof * 2" instead here :P
>>> might have to put it in a const.
>>>
>> I think that won't work. The only place I know that .stringof works
>> that way is __LINE__.stringof but that's special cased in the lexer
>> IIRC.
>>
> Just try it, please?
>
> template Itoa(int x)
> {
> const Itoa = x.stringof;
> }
> pragma(msg, (5).stringof); // "5"
> pragma(msg, (3 + 4).stringof); // "3 + 4"
> pragma(msg, Itoa!(3 + 4)); // "7"
I stand corrected:
It didn't work last time I tried it. (I think I only managed to test case
2 & 1but with consts)
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