an example of how to make a new genotype within EO - see HTML doc

eo/tutorial/Lesson5/eoOneMaxQuadCrossover.h

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+/** -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+The above line is usefulin Emacs-like editors
+ */
+
+/*
+Template for simple quadratic crossover operators
+=================================================
+
+Quadratic crossover operators modify the both genotypes
+*/
+
+#ifndef eoOneMaxQuadCrossover_H
+#define eoOneMaxQuadCrossover_H
+
+#include <eoOp.h>
+
+/** 
+ *  Always write a comment in this format before class definition
+ *  if you want the class to be documented by Doxygen
+ *
+ * THere is NO ASSUMPTION on the class GenoypeT.
+ * In particular, it does not need to derive from EO
+ */
+template<class GenotypeT> 
+class eoOneMaxQuadCrossover: public eoQuadOp<GenotypeT>
+{
+public:
+  /**
+   * Ctor - no requirement
+   */
+// START eventually add or modify the anyVariable argument
+  eoOneMaxQuadCrossover()
+  //  eoOneMaxQuadCrossover( varType  _anyVariable) : anyVariable(_anyVariable) 
+// END eventually add or modify the anyVariable argument
+  {
+    // START Code of Ctor of an eoOneMaxEvalFunc object
+    // END   Code of Ctor of an eoOneMaxEvalFunc object
+  }
+
+  /// The class name. Used to display statistics
+  string className() const { return "eoOneMaxQuadCrossover"; }
+
+  /**
+   * eoQuad crossover - modifies both parents
+   * @param _genotype1 The first parent
+   * @param _genotype2 The second parent
+   */
+  bool operator()(GenotypeT& _genotype1, GenotypeT & _genotype2) 
+  {
+    bool oneAtLeastIsModified;
+    // START code for crossover of _genotype1 and _genotype2 objects
+
+       /** Requirement
+	* if (at least one genotype has been modified) // no way to distinguish
+	*     oneAtLeastIsModified = true;
+	* else
+	*     oneAtLeastIsModified = false;
+	*/
+    return oneAtLeastIsModified;
+    // END code for crossover of _genotype1 and _genotype2 objects
+  }
+
+private:
+// START Private data of an eoOneMaxQuadCrossover object
+  //  varType anyVariable;		   // for example ...
+// END   Private data of an eoOneMaxQuadCrossover object
+};
+
+#endif