Re: uint64_t error and architecture targets
Re: uint64_t error and architecture targets
- Subject: Re: uint64_t error and architecture targets
- From: "Clark S. Cox III" <email@hidden>
- Date: Thu, 10 Feb 2011 20:06:15 -0800
The standard guarantees that -1, when converted to an unsigned type becomes the largest value representable by that type.
Sent from my iPhone
On Feb 10, 2011, at 19:52, Jeff Laing <email@hidden> wrote:
>> The "UL" at the end of your literal indicates that you want it to be (unsigned
>> long). On 32-bit, that isn't possible, and that is what the compiler is
>> telling you. Use "ULL".
>>
>> On the other hand, a convenient way to get the maximum value into an unsigned
>> variable, regardless of its size is to use -1"
>>
>> uint64_t y = -1;
>
> Hmmm, I'd have thought proper compilers would have complained about that being a signed value in an unsigned variable. Are you sure you don't have a warning turned down somewhere?
>
> I've always used ~0 to achieve this result.
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