Re: [boost] Re: [review] hash functions

From: Peter Dimov (pdimov_at_[hidden])
Date: 2005-03-13 14:12:41

Thorsten Ottosen wrote:
> "David Abrahams" <dave_at_[hidden]> wrote in message
> news:ubr9ow6b6.fsf_at_boost-consulting.com...
>>
>> There's no guarantee that the integer type will have sufficient size.
>
> BOOST_STATIC_ASSERT( sizeof(void*) >= sizeof(std::size_t))
>
> ?

The reverse, probably. Technically, it's still not enough; sizeof gives you 
the size of the object in chars, not the number of value bits. This aside, 
the assert doesn't tell you whether reinterpret_cast produces a reasonable 
hash value; this is an inherently non-portable characteristic of the 
particular platform.