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POC++ template compilation error: expected primary-expression before ‘>’ token
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  1. POC++ template compilation error: expected primary-expression before ‘>’ token
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    copied!<p>This code compiles and works as expected (it throws at runtime, but never mind):</p> <pre><code>#include &lt;iostream&gt; #include &lt;boost/property_tree/ptree.hpp&gt; void foo(boost::property_tree::ptree &amp;pt) { std::cout &lt;&lt; pt.get&lt;std::string&gt;("path"); // &lt;--- } int main() { boost::property_tree::ptree pt; foo(pt); return 0; } </code></pre> <p>But as soon as I add templates and change the <code>foo</code> prototype into</p> <pre><code>template&lt;class ptree&gt; void foo(ptree &amp;pt) </code></pre> <p>I get an error in GCC:</p> <pre><code>test_ptree.cpp: In function ‘void foo(ptree&amp;)’: test_ptree.cpp:7: error: expected primary-expression before ‘&gt;’ token </code></pre> <p>but no errors with MSVC++! The error is in the marked line <code>&lt;---</code>. And again, if I change the problem line into</p> <pre><code>--- std::cout &lt;&lt; pt.get&lt;std::string&gt;("path"); // &lt;--- +++ std::cout &lt;&lt; pt.get("path", "default value"); </code></pre> <p>the error disappears (the problem is in explicit <code>&lt;std::string&gt;</code>).</p> <p><a href="http://www.boost.org/doc/libs/1_44_0/doc/html/property_tree.html" rel="noreferrer" title="Boost.PropertyTree">Boost.PropertyTree</a> requires Boost >= 1.41. Please help me to understand and fix this error.</p> <hr> <p><strong>See <a href="https://stackoverflow.com/questions/1682844/templates-template-function-not-playing-well-with-classs-template-member-functi">Templates: template function not playing well with class’s template member function</a></strong> — a similar popular question containing other good answers and explanations.</p>
 

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