added PSO ring topology test

eo/test/t-eoRingTopology.cpp

@@ -0,0 +1,68 @@
+//-----------------------------------------------------------------------------
+// t-eoRingTopology.cpp
+//-----------------------------------------------------------------------------
+
+
+#include <eo>
+
+typedef eoRealParticle < double >Indi;
+
+//Evaluation function
+double f (const Indi & _indi)
+{
+    double sum = 0;
+    for (unsigned i = 0; i < _indi.size (); i++)
+      sum += pow(_indi[i],2);
+    return (-sum);
+}
+
+int the_main(int argc, char **argv)
+{
+	//Parameters
+    const unsigned int VEC_SIZE = 2;        
+    const unsigned int POP_SIZE = 10;        
+    const unsigned int NEIGHBORHOOD_SIZE= 3; 
+
+    rng.reseed (33);
+    eoEvalFuncPtr<Indi, double, const Indi& > plainEval(f);
+    eoEvalFuncCounter < Indi > eval (plainEval);
+    eoUniformGenerator < double >uGen (0., 5.);
+    eoInitFixedLength < Indi > random (VEC_SIZE, uGen);   
+    eoUniformGenerator < double >sGen (-1., 1.);
+    eoVelocityInitFixedLength < Indi > veloRandom (VEC_SIZE, sGen);
+    eoFirstIsBestInit < Indi > localInit;
+    eoStandardFlight < Indi > flight; 
+    eoPop < Indi > pop;
+    pop.append (POP_SIZE, random);
+    apply(eval, pop);
+    apply < Indi > (veloRandom, pop);
+    apply < Indi > (localInit, pop);
+    eoRingTopology<Indi> topology(NEIGHBORHOOD_SIZE);
+    topology.setup(pop);
+    std::cout<<"\n\n\nPopulation :\n\n"<<pop;
+    std::cout<<"\n\nNeighborhood :\n\n";
+    topology.printOn();
+    int k = NEIGHBORHOOD_SIZE/2;
+    for(unsigned i=0;i<pop.size();i++)
+    {
+    	std::cout<<"\nBetween : ";
+    	for(unsigned j=0;j<NEIGHBORHOOD_SIZE;j++)
+    		std::cout<<"\n"<<pop[((pop.size()+i-k+j)%pop.size())];
+    	std::cout<<"\nThe best is : \n"<<topology.best(i)<<"\n";
+    }
+    std::cout<<"\n\n";
+	return 1;
+}
+
+int main(int argc, char **argv)
+{
+    try
+    {
+        the_main(argc, argv);
+    }
+    catch(std::exception& e)
+    {
+        std::cout << "Exception: " << e.what() << std::endl;
+    }
+
+}