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From: John Maddock (jz.maddock_at_[hidden])
Date: 2022-08-13 12:01:20

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.

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