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    <p><strong>EDIT:</strong></p> <p>OK, I've figured out your problem. It is the non-reference version of the <code>operator==</code>. It makes the <code>operator==</code> ambiguous. Simply remove it (as I originally suggested) and it'll work fine.</p> <hr> <p><strong>EDIT:</strong></p> <p>In response to your edit, you should still remove the first version of the <code>operator==</code> There is no need to make a copy of the object in question and then compare it. The second <code>operator==</code> looks reasonable and should work. Is there anything else you are leaving out?</p> <hr> <p><strong>EDIT:</strong></p> <p>The following compiles just fine for me using g++ 4.4.1:</p> <pre><code>#include &lt;iostream&gt; struct DistinctWord { DistinctWord(const std::string &amp;s) : strWord(s){} bool operator==(const DistinctWord&amp; W) const { return strWord == W.strWord; } std::string strWord; }; int main() { DistinctWord* wordOne = new DistinctWord("Test"); DistinctWord* wordTwo = new DistinctWord("Test"); if(*wordOne == *wordTwo) std::cout &lt;&lt; "true"; else std::cout &lt;&lt; "false"; } </code></pre> <p>If you are still having problems, then you are not showing all relevant code...</p> <hr> <p>First of all, where is the definition for <code>DistinctWord</code> and how does it relate to <code>Word</code>?</p> <p>Beyond that, you should do this:</p> <pre><code>bool Word::operator==(const Word&amp; W) const { return strWord == W.strWord; } </code></pre> <p>and just remove the two <code>operator==</code>'s you currently have. The first is making a copy then comparing which is silly, and your second is comparing a modifiable reference and always returning true which doesn't really serve any purpose.</p> <p>This one should work fine.</p>
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    1. COEdit show what I have now. Error still there The reason for two methods is so I can pass by reference or by value. I just placed return true in there for testing purposes. Thanks for the help.
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    2. COWhy do you wish to pass by value? The only useful things to pass should be allowed by the const ref version.
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    3. COYours works for me in a new project, but not in my current one. I'm going to go thru and see what I can find. I'll post back in a bit with the results. Thanks
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