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POPlease explain this C++ syntax which seems to be incomplete or lacks assignment?
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copied!<pre><code>reply_form::reply_form() { using cppcms::locale::translate; author.message(translate("Author")); comment.message(translate("Comment")); send.value(translate("Send")); *this + author + comment + send; author.limits(1,64); comment.limits(1,256); } </code></pre> <p>In the given constructor definition, someone please explain what this syntax means or its intended use and benefits:</p> <pre><code>*this + author + comment + send; </code></pre> <p>To me, it appears as if a concatenation/addition which is done without it being assigned to anything, and thats really confusing me as I am not able to understand its purpose.</p> <p>I have made good searches on web with the problem, but probably, I am not using the right term to search for it as I do not know what exactly this type of syntax is termed as.</p> <p>I feel as if its the part of latest C++1x features, but not sure, so not able to find the right book for it. Finally chose stackoverflow for rescue :-)</p> <p>EDIT:</p> <p>the Most relevant I could provide is its declaration in header file, which is:</p> <pre><code>struct reply_form : public cppcms::form { cppcms::widgets::text author; cppcms::widgets::textarea comment; cppcms::widgets::submit send; reply_form(); }; </code></pre> <p>EDIT2:Revision2 (corrected again after checking comments)</p> <p>Ok, I was able to traceback the operator+ thing, and found out the way it was overloaded:</p> <pre><code> inline form &operator + (form &f) { add(f); return *this; } </code></pre> <p>So this was the case of operator overloading. Thanks for your answer. I have been recently migrated to C++ and had found some strange things as I had posted in this thread: <a href="https://stackoverflow.com/questions/6928913/explain-blank-class-functions-in-c">Explain blank class functions in C++</a> which appeared to me as multifunction list with blank body, but later I understood it as a syntax and a way of declaring a variable or calling the base class constructor.</p> <p>Thanks for your answers, it were really helpful and very quick!</p>

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