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POC++ STL wrong keys types
 

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  1. POC++ STL wrong keys types
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    <p>can't understand this: g++ compiler is angry on:</p> <pre><code>lengths.insert(pair&lt;Deux,long&gt;(d,one)); </code></pre> <p>where</p> <pre><code>struct Deux {long big; long small}; map&lt;Deux, long&gt; lengths; Deux d; long one; </code></pre> <p>so, g++ said, that i miss <code>operator&lt;</code>. after making overloaded <code>operator&lt;</code> for <code>struct Deux</code>, i saw new interesting, but the same error:</p> <pre><code>map &lt;long, Node*&gt;ArrayOfNodes; map &lt;long, Node*&gt;::iterator it; for (it=ArrayOfNodes[Root]-&gt;nodes.begin();it&lt;ArrayOfNodes[Root]-&gt;nodes.end();++it) cout&lt;&lt;it-&gt;first&lt;&lt;endl; </code></pre> <p>also used structure Node: </p> <pre><code>struct Node { long name; long guest; map &lt;long,Node*&gt;nodes; /*bool operator&lt;(const Node&amp; node)const{ if ((*this).name&lt;node.name) return true; if ((*this).name&gt;node.name) return false; return (*this).guest&lt;(*this).guest; }*/ </code></pre> <p>and error is: </p> <pre><code> no match for operator&lt; in it &lt; ((Path*)this)-&gt;Path::ArrayOfNodes. std::map&lt;_Key, _Tp, _Compare, _Alloc&gt;::operator[] [with _Key = long int, _Tp = Node*, _Compare = std::less&lt;long int&gt;, _Alloc = std::allocator&lt;std::pair&lt;const long int, Node*&gt; &gt;] (((const long int&amp;)((const long int*)(&amp;((Path*)this)-&gt;Path::Root))))-&gt;Node::nodes.std::map&lt;_Key, _Tp, _Compare, _Alloc&gt;::end [with _Key = long int, _Tp = Node*, _Compare = std::less&lt;long int&gt;, _Alloc = std::allocator&lt;std::pair&lt;const long int, Node*&gt; &gt;]() </code></pre>
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    1. USgaussblurinc
    1. USgaussblurinc
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    1. COWhat is the compiler error?
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      1. USConstantinius
    2. COWhat is the compiler error message?
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      1. USOliver Charlesworth
    3. COWhy don't you update your question to show us actual code and the actual compiler error message?
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      1. USSebastian Mach
 

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