Re: stream operators for number

From: Gero Peterhoff (g.peterhoff_at_[hidden])
Date: 2022-08-15 19:10:59

Am 13.08.22 um 14:01 schrieb John Maddock via Boost:
> On 13/08/2022 12:26, Gero Peterhoff via Boost wrote:
>> Hello,
>> can you please provide the << and >> operators for boost::multiprecision::number as a stream template?
>>
>> currently (fixed ostream)
>> template <class Backend, expression_template_option ExpressionTemplates>
>> std::ostream& operator<<(std::ostream& os, const number<Backend, ExpressionTemplates>&)
>>
>> useful
>> template <typename Char, typename Traits, typename Backend, expression_template_option ExpressionTemplates>
>> std::basic_ostream<Char, Traits>& operator<<(std::basic_ostream<Char, Traits>& stream, const number<Backend, ExpressionTemplates>&)
> 
> I dodged that when first writing multiprecision because some backends (all those that are external C libraries) have narrow character conversions only.
> 
> So far - and somewhat to my surprise - not one person has requested template iostream operators.  Do you have a concrete use case?
> 
> Best, John.

My game is called "Compatibility" :-)

thx
Gero