Boost Users :
Subject: Re: [Boost-users] RES: How do I print a standard pair?
From: Krzysztof Å»elechowski (giecrilj_at_[hidden])
Date: 2011-09-26 03:51:54
Matheus Peschke de Azevedo wrote:
> According to the C++ standard, the ostream output (cout and wcout) will
> only handle built-in types (e.g., int, char, double, etc).
Not true, vide ::std:: complex.
> It's up to the
> developer implement how all other types will print to the output. See full
> rationale and details in Stroustrup, Bjarne TCPPPL 3rd Edition - 21.2.2
> Output of Built In Types.
> In short, you'll have to define a global operator<< for type std::pair<T,
> template<typename CharType, typename T, typename U>
> std::basic_ostream<CharType>& operator<< (std::basic_ostream<CharType>& o,
> std::pair<T, U> mypair)
> return o << "This is my way of printing a pair: first: " <<
> mypair.first << " and second: " << mypair.second;
This is strictly forbidden by the standard AFAIK.
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