Re: operator<< for std::map

From:

"Jim Langston" <tazmaster@rocketmail.com>

Newsgroups:

comp.lang.c++.moderated

Date:

Sun, 21 Oct 2007 10:43:05 CST

Message-ID:

<nWqSi.29$GB1.16@newsfe06.lga>

"Barry" <dhb2000@gmail.com> wrote in message
news:ffbuel$ird$1@news.cn99.com...

mojmir wrote:

hello,

template<typename K, typename T>
inline
std::ostream & operator<< (std::ostream & s, std::map<K,T> const & m)
{
     s << "(";
     typedef typename std::map<K,T>::value_type t;
     std::copy(m.begin(), m.end(), std::ostream_iterator<t>(s, " "));
     s << ")";
     return s;
}

but the copy line fails to compile and i am unable to guess why.

The code compiles fine,
make sure you include the <iterator> and <algorithm>

I was trying to compile his code, and it won't compile for me. Microsoft
Visual C++ .net 2003.

error C2679: binary '<<' : no operator found which takes a right-hand
operand of type 'const t' (or there is no acceptable conversion)

It's complaining for me about the std::copy.

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