Re: [boost] [units] Interest in UDLs (e.g. _kg) for units?

Subject: Re: [boost] [units] Interest in UDLs (e.g. _kg) for units?
From: Sebastian Redl (sebastian.redl_at_[hidden])
Date: 2014-08-25 10:03:58

On 25 Aug 2014, at 13:24, Mathias Gaunard <mathias.gaunard_at_[hidden]> wrote:

> On 22/08/14 10:08, Curdeius Curdeius wrote:
>> Hi all,
>> 
>> I was wondering if there is any interest in adding User-Defined Literals
>> (UDLs) to Boost.Units.
>> 
>> IMO, it could simplify some code and improve code readability in some cases.
>> For example instead of writing (it's a somehow artificial example)
>>     5.34 * si::milli * si::kilogram;
>>     1234 * si::kilogram;
>> one would write
>>     5.34_g;
>>     1234_kg;
> 
> Did you mean to write
> 5.34_g * si::milli;
> or
> 5.34_mg;
> ?

No, to get grams you need si::milli * si::kilogram. I assume the intention is that the _g suffix already includes that scaling - otherwise it’d be broken.

Sebastian