[boost] [test] interfacing with units proposal

From: Matthias Schabel (boost_at_[hidden])
Date: 2007-03-28 13:54:04

This may be of interest to the Boost.Test maintainers...

Matthias

> From: Steven Watanabe <steven_at_[hidden]>
> Date: March 28, 2007 11:55:39 AM MDT
> To: Matthias Schabel <boost_at_[hidden]>
> Cc: "K. R. Walker" <krwalker_at_[hidden]>
> Subject: Re: [boost][units] interfacing with boost::ublas
>
> AMDG
>
> Matthias Schabel wrote:
>> This ought to work (untested) :
>>
>> BOOST_CHECK_CLOSE(a,b,0.1*SI::meters);
> It doesn't.  The comparison is fine as is.
>
> replace floating_point_comparison.hpp line 71 ff. with
>
> template<typename FPT, typename PersentType = FPT >
> class close_at_tolerance {
> public:
>    // Public typedefs
>    typedef bool result_type;
>
>    // Constructor
>    explicit    close_at_tolerance( PersentType  
> percentage_tolerance, floating_point_comparison_type fpc_type =  
> FPC_STRONG )
>    : p_fraction_tolerance( static_cast<FPT>(0.01) 
> *percentage_tolerance ), p_strong_or_weak( fpc_type ==   
> FPC_STRONG ) {}
>
>    bool        operator()( FPT left, FPT right ) const
>    {
>        FPT diff = tt_detail::fpt_abs( left - right );
>              return impl(tt_detail::safe_fpt_division( diff,  
> tt_detail::fpt_abs( right ) ),
>            tt_detail::safe_fpt_division( diff, tt_detail::fpt_abs 
> ( left ) ));
>    }
>
>    template<class F>
>    bool impl(F d1,F d2) const {
>        return p_strong_or_weak ? (d1 <= p_fraction_tolerance.get()  
> && d2 <= p_fraction_tolerance.get())
>                                : (d1 <= p_fraction_tolerance.get()  
> || d2 <= p_fraction_tolerance.get());
>    }
>
>    // Public properties
>    readonly_property<FPT>  p_fraction_tolerance;
>    readonly_property<bool> p_strong_or_weak;
> };
>
> In Christ,
> Steven Watanabe
>