feat: EDO add combinable estimators

Useful to edit the distribution during init, restart or even search.

edo/src/edoEstimatorAdaptiveEdit.h

@@ -0,0 +1,79 @@
+/*
+The Evolving Distribution Objects framework (EDO) is a template-based,
+ANSI-C++ evolutionary computation library which helps you to write your
+own estimation of distribution algorithms.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Copyright (C) 2020 Thales group
+*/
+/*
+Authors:
+    Johann Dréo <johann.dreo@thalesgroup.com>
+*/
+
+#ifndef _edoEstimatorAdaptiveEdit_h
+#define _edoEstimatorAdaptiveEdit_h
+
+#include <eoPop.h>
+
+#include "edoEstimatorAdaptive.h"
+
+/** An estimator that calls `reset` on the managed distribution.
+ *
+ * @ingroup Estimators
+ */
+template<class D, class P = typename D::EOType>
+class edoEstimatorAdaptiveEdit : public edoEstimatorAdaptive<D>
+{
+public:
+    typedef typename D::EOType EOType;
+
+    /** Edit the given distribution's members with the given accessors.
+     *
+     * For example, to shift the distribution's mean toward pop's best element
+     * (note the lack of parenthesis):
+     * @code
+     * edoEstimatorAdaptiveEdit<D> e(distrib,
+     *      std::bind(&eoPop<S>::best_element, &pop),
+     *      // std::bind(&D::mean, &distrib, std::placeholders::_1) // Fail to deduce templates
+     *      // but you can use lambdas (even more readable):
+     *      [&distrib](S center){distrib.mean(center);}
+     * distrib.mean, pop.best_element);
+     * @endcode
+     */
+    edoEstimatorAdaptiveEdit<D>(
+        D& distrib,
+        std::function<P()> getter,
+        std::function<void(P)> setter
+    ) :
+        edoEstimatorAdaptive<D>(distrib),
+        _getter(getter),
+        _setter(setter)
+    {}
+
+    virtual D operator()( eoPop<EOType>& pop )
+    {
+        _setter( _getter() );
+        return this->_distrib;
+    }
+
+protected:
+    std::function<  P ( )> _getter;
+    std::function<void(P)> _setter;
+
+};
+
+#endif // !_edoEstimatorAdaptiveEdit_h