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    <p>Here's one of my favorites, but it doesn't use <code>std::ostream_iterator</code>:</p> <pre><code>#include &lt;iterator&gt; #include &lt;string&gt; #include &lt;iosfwd&gt; template &lt;class C&gt; auto print(std::ostream&amp; os, const C&amp; c, const std::string&amp; delim = std::string(", "), const std::string&amp; open_brace = std::string("{"), const std::string&amp; close_brace = std::string("}") ) -&gt; decltype(std::begin(c), std::end(c), os) { os &lt;&lt; open_brace; auto i = std::begin(c); auto e = std::end(c); if (i != e) { os &lt;&lt; *i; for (++i; i != e; ++i) os &lt;&lt; delim &lt;&lt; *i; } os &lt;&lt; close_brace; return os; } #include &lt;list&gt; #include &lt;iostream&gt; int main() { std::list&lt;double&gt; x{1,2,3,4,5,6}; print(std::cout, x) &lt;&lt; '\n'; } {1, 2, 3, 4, 5, 6} </code></pre> <p><strong>Update</strong></p> <p>Oliver goaded me into a challenge I couldn't resist. :-)</p> <pre><code>#include &lt;iterator&gt; #include &lt;string&gt; #include &lt;iosfwd&gt; namespace my { template &lt;class C&gt; auto print(std::ostream&amp; os, const C&amp; c, const std::string&amp; delim = std::string(", "), const std::string&amp; open_brace = std::string("{"), const std::string&amp; close_brace = std::string("}") ) -&gt; decltype(std::begin(c), std::end(c), os); template &lt;class C, typename std::enable_if &lt; !std::is_same&lt;C, std::string&gt;::value, bool&gt;::type = false &gt; inline auto operator&lt;&lt; (std::ostream&amp; os, const C&amp; c) -&gt; decltype(print(os, c)) { return print(os, c); } template &lt;class C&gt; auto print(std::ostream&amp; os, const C&amp; c, const std::string&amp; delim, const std::string&amp; open_brace, const std::string&amp; close_brace ) -&gt; decltype(std::begin(c), std::end(c), os) { os &lt;&lt; open_brace; auto i = std::begin(c); auto e = std::end(c); if (i != e) { os &lt;&lt; *i; for (++i; i != e; ++i) os &lt;&lt; delim &lt;&lt; *i; } os &lt;&lt; close_brace; return os; } } #include &lt;list&gt; #include &lt;forward_list&gt; #include &lt;iostream&gt; int main() { std::forward_list&lt;std::list&lt;double&gt;&gt; x{{}, {3, 2, 1}, {1,2,3,4,5,6}}; my::print(std::cout, x) &lt;&lt; '\n'; } {{}, {3, 2, 1}, {1, 2, 3, 4, 5, 6}} </code></pre> <p>It isn't perfect, but it was fun. :-) There's probably a better way to do it that would propagate the custom delimiter and braces more faithfully.</p>
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    1. CO+1 Is there a tweak to this so that it can print `list<list<double> >`? Maybe recursively calling print on the inner objects if they're containers?
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    2. COMay I ask why is that `decltype(std::begin(c), std::end(c), os)` for? Couldn't the return value just be `std::ostream&`?
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    3. CO@Oliver: Yes, recursively calling print on the inner objects is probably the way to go. I slapped together an alternative just for fun.
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