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POC++ unpack/unbox class method arguments
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copied!<p>I have a a bunch of subclasses each with static class factory methods of varying argument numbers and types, and would also like to instantiate them from data loaded via a json data file using <a href="http://jsoncpp.sourceforge.net/" rel="nofollow noreferrer">jsonpp</a>.</p> <p>So say I'll have an array of Json::Value objects for the arguments, is there a smart way, using macros or something in c++ to create alternate proxy methods that accepts the Json::Value array and calls the original method, e.g.)</p> <pre><code>Foo* Foo::create(int a, const char* b) { /* ... */ } Foo* Foo::create(Json::Value args) { //the Json::Value args represents an array value here // can I avoid having to manually create each of these Json methods? return Foo::create(args[0].asInt(), args[1].asCString()); } </code></pre> <p>Sorry, my c++ is still getting up to speed. I've found a few topics that seem to deal with unpacking tuple arguments for example,</p> <ul> <li><a href="https://stackoverflow.com/questions/10766112/c11-i-can-go-from-multiple-args-to-tuple-but-can-i-go-from-tuple-to-multiple?lq=1">C++11: I can go from multiple args to tuple, but can I go from tuple to multiple args?</a></li> <li><a href="https://stackoverflow.com/questions/687490/how-do-i-expand-a-tuple-into-variadic-template-functions-arguments">How do I expand a tuple into variadic template function's arguments?</a></li> <li><a href="https://stackoverflow.com/questions/11044504/any-solution-to-unpack-a-vector-to-function-arguments-in-c">Any Solution to Unpack a Vector to Function Arguments in C++?</a></li> </ul> <p>but I am unsure of which approach to proceed with. Thanks for the help</p>

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