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.