Hi,
I'm cross-compiling my app from PC Linux to ARMBE-Linux. And I'm using the
cURLlibpp library which is a http transfer library. There is a callback
inside it which I must specify in order to read data from the response data
block from a remote web server.
There are 15 different polymorphic methods inside the class called Options
which manifests itself with a no of 1-15 parameters that I can make use of.
I don't know why the compiler always goes for 3 parameters instead of 4

size_t write_data (void *ptr, size_t size, size_t nmemb, void * stream)
{
int written = fwrite (ptr, size, nmemb, stream);
return written;
}

in the main I have
try
{
cURLpp::Cleanup myCleanup;

cURLpp::Options::Url myUrl("192.168.0.19");

etc

cURLpp::Types::WriteFunctionFunc functor (write_data);
cURLpp::Options::WriteFunction *test = new
cURLpp::Options::WriteFunction(functor);
myRequest.setOpt(test);

myRequest.perform();

etc

I have re-configured the library and the app for many times but this error
is still occurring... Pls help

Webcam.cpp:204: instantiated from here
/usr/local/include/utilspp/functor/FunctorHandler.cpp:50: error: too few
arguments to function

I don't know why the compiler keeps choosing the wrong version of callback
functions


Thanks
Jack

What is line 50 in the FunctorHandler.cpp file?

OK
line 50
ResultType operator()(typename ParentFunctor::Param1 p1, typename
ParentFunctor::Param2 p2, typename ParentFunctor::Param3 p3)
{ return (mFun)(p1,p2,p3); }

ResultType operator()(typename ParentFunctor::Param1
p1, typename ParentFunctor::Param2 p2, typename ParentFunctor::Param3 p3,
typename ParentFunctor::Param4 p4)
{ return (mFun)(p1, p2, p3, p4); }

It's part of libcURLpp Thanks
Jack

From the looks of your second post, mFun is your 4 argument callback, however the 3 argument operator () is called somewhere somehow (as a result of line 204 of Webcam.cpp), thereby submitting one too few arguments to your callback. Try giving stream a default value in write_data and see what happens (although that is by no means the solution.)
ta0kira

PS Your problem is with function overloading, not polymorphism.