Re: [Boost-users] Does boost have a float-to-integer conversion?

From: linux (linux_at_[hidden])
Date: 2008-02-07 12:23:57

Actually, I was hoping Boost had an float-to-integer conversion so I 
could look at the implementation.  I need to convert a float to int, but 
not in OpenGL Shading Language, which is "C like" but it doesn't have 
pointers, bit-shifts etc.

Ed

Frank Mori Hess wrote:
> On Thursday 07 February 2008 07:40 am, Fernando Cacciola wrote:
>   
>> Then I suspect you don't really want to "convert" the float to int but to
>> get at the value-representation of the float.
>> If that's the case, you can do this:
>>
>> char* float_value_rep =
>> static_cast<char*>(static_cast<void*>(&your_float));
>>     
>
> Isn't this what reinterpret_cast is for?  It wouldn't require bouncing through 
> a void*.  Also, to the original poster, don't succumb to the temptation to 
> cast to anything other than a char* (like an int*) or you'll end up in strict 
> aliasing violation hell.
>
>   
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