[boost] Re: Boost.Random patch for gcc-3.4.1

From: David Abrahams (dave_at_[hidden])
Date: 2004-07-21 06:20:20

Synge Todo <wistaria_at_[hidden]> writes:

> From: Michael Stevens <Michael.Stevens_at_[hidden]>
> Date: Sat, 17 Jul 2004 15:51:47 +0200
>> The patches add #include<cmath> to a couple of the Random headers.
>> This is I assume to provide std::pow definitions for builtin types.
>
> Yes.
>
>> In this situation this is wrong. The Random headers are totally generic and 
>> can be used on a variety of numeric types. Not necessarily the builtin float 
>> etc. It is the user's responsibility to make sure that a 'pow' is defined for 
>> the specific type used. Random will find such definition in namespace std or 
>> with type dependant (Konig) lookup.
>
> I am a bit confused.  Can "using std::pow;" be accepted by the
> compilers without a declaration of std::pow?

No it can't.

-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com