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POHow do I create overloaded operators for boost pointers in C++?
 

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  1. POHow do I create overloaded operators for boost pointers in C++?
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    <p>From this post I see that you can't overload operators for pointers: <a href="https://stackoverflow.com/questions/1419997/c-operator-overloading-of-for-pointers-to-objects">C++: Operator overloading of &lt; for pointers to objects</a></p> <p>But is there any way I could overload operators for boost pointers? For example:</p> <pre><code> boost::shared_ptr&lt;ClassB&gt; operator||(boost::shared_ptr&lt;ClassA&gt; lhs, boost::shared_ptr&lt;ClassA&gt; rhs) { boost::shared_ptr&lt;ClassB&gt; returnVal = CreateClassBSharedPtr(lhs, rhs); return returnVal; } </code></pre> <p>When attempting this, I get an ambiguous overload error (it conflicted with the built in operator||(bool, bool)). Any ideas to get around this?</p> <p><strong>Edit: Adding some more details below as to why I'd like to do this.</strong></p> <p>I'll try to explain what I'm attempting as best I can. What I'd like to do is make a "validator" object for maps that can check if certain properties hold. For example:</p> <pre><code>boost::shared_ptr&lt;MyValidator&gt; my_validator = IsEmpty("key name 1") &amp;&amp; IsNotEmpty("key name 2") || HasNElements("key name 3", num) </code></pre> <p>Later, to validate a map:</p> <pre><code>if(my_validator.validate(some_map)) { ... } </code></pre> <p>I think I'm stuck with using pointers because I can't use pass by value (since I'm making use of polymorphism) and I can't use pass by const reference (since there would be temporary object created by nesting operators that would not exist later when trying to validate). </p> <p><strong>Edit: Added a new question specific to my problem here:</strong> <a href="https://stackoverflow.com/questions/3441608/implementation-suggestions-for-creating-an-expression-later-used-to-evaluate-the">Implementation suggestions for creating an expression later used to evaluate the contents of a map in c++?</a></p>
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    1. COnot that it answers your question, but... **why would you do this**?!?
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      1. POHow do I create overloaded operators for boost pointers in C++?
      1. USEvan Teran
    2. COFollowing Evan's comment: http://www.parashift.com/c++-faq-lite/operator-overloading.html#faq-13.8
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    3. COSo you really want to construct an expression, and then later apply that expression to the contents of a map? If so, I would ask another, different question about that, leaving out the shared pointer stuff, which seems to be an implementation detail.
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